United Kingdom

This work programme was focused on identifying a suitable odorant for use in a 100% hydrogen gas grid (domestic use such as boilers and cookers). The research involved a review of existing odorants (used primarily for natural gas) and the selection of five suitable odorants based on available literature. One odorant was selected based on possible suitability with a Polymer Electrolyte Membrane (PEM) based fuel cell vehicle which could in future be a possible end-user of grid hydrogen. NPL prepared Primary Reference Materials containing the five odorants in hydrogen at the relevant amount fraction levels (as would be found in the grid) including ones provided by Robinson Brothers (the supplier of odorants for natural gas in the UK). These mixtures were used by NPL to perform tests to understand the effects of the mixtures on pipeline (metal and plastic) appliances (a hydrogen boiler provided by Worcester Bosch) and PEM fuel cells. HSE investigated the health and environmental impact of these odorants in hydrogen. Olfactory testing was performed by Air Spectrum to characterise the ‘smell’ of each odorant. Finally an economic analysis was performed by E4tech. The results confirm that Odorant NB would be a suitable odorant for use in a 100% hydrogen gas grid for combustion applications but further research would be required if the intention is to supply grid hydrogen to stationery fuel cells or fuel cell vehicles. In this case further testing would need to be performed to measure the extent of fuel cell degradation caused by the non-sulphur odorant obtained as part of this work programme and also other UK projects such as the Hydrogen Grid to Vehicle (HG2V) project would provide important information about whether a purification step would be required regardless of the odorant before the hydrogen purity would be suitable for a PEM fuel cell vehicle. If purification was required it would be fine to use Odorant NB as this would be removed during the purification step.

This report and any attachment is freely available on the ENA Smarter Networks Portal here. IGEM Members can download the report and any attachment directly by clicking on the pdf icon above.

Time is rapidly running out to make the crucial planning decisions and secure investment to keep the UK on track to deliver a reliable affordable and decarbonised energy system to meet future emissions regulation enshrined in the 2008 Climate Change Act according to a report published today by the Royal Academy of Engineering.

Prepared for the Prime Minister's Council for Science and Technology A critical time for UK energy policy details the actions needed now to create a secure and affordable low carbon energy system for 2030 and beyond.

The study looks at the future evolution of the UK’s energy system in the short to medium term. It considers how the system is expected to develop across a range of possible trajectories identified through modelling and scenarios.

The following actions for government are identified as a matter of urgency:

• enable local or regional whole-system large scale pilot projects to establish real-world examples of how the future system will work. These must move beyond  current single technology demonstrators and include all aspects of the energy systems along with consumer behaviour and financial mechanisms
• drive forward new capacity in the three main low carbon electricity generating technologies: nuclear carbon capture and storage (CCS) and offshore wind
• develop policies to accelerate demand reduction especially in domestic heating and introduce smarter demand management
• clarify and stabilise market mechanisms and incentives in order to give industry the confidence to invest.

New technologies could become unexpectedly significant – such as solar PV which has recently become much cheaper. But large scale deployment of novel technologies would take decades and the system cannot be planned on promises and aspirations alone. The Academy calls instead for a combination of known technologies to be scaled up to unprecedented levels and integrated in smarter ways.

The report notes that the addition of shale gas or tight oil is unlikely to have a major impact on the evolution of the UK's energy system as we already have secure and diverse supplies of hydrocarbons from multiple sources.

Dr David Clarke FREng who led the group that produced the report says: “Updating the UK energy system to meet the ‘trilemma’ of decarbonisation security and affordability is a massive undertaking. Meeting national targets affordably requires substantial decarbonisation of the electricity system by 2030 through a mix of nuclear power CCS and renewables with gas generation for balancing. Beyond 2030 we must then largely decarbonise heat and transport potentially through electrification but also using other options such as hydrogen and biofuels. We also need to adapt our transmission and distribution networks to become ‘smarter’”.

"Failure to plan the development of the whole energy system carefully will result at best in huge increases in the cost of delivery or at worst a failure to deliver. Substantial investment is needed and current investment capacity is fragile. For example in the last month projects like Carlton’s new Trafford CCGT plant have announced further financing delays and the hoped-for investment by Drax in the White Rose CCS demonstrator has been withdrawn. The UK has also dropped four places to 11th in EY’s renewable energy country attractiveness index.”

Link to document download on Royal Society Website

According to European Directive 2014/94/EU hydrogen providers have the responsibility to prove that their hydrogen is of suitable quality for fuel cell vehicles. Contaminants may originate from hydrogen production transportation refuelling station or maintenance operation. This study investigated the probability of presence of the 13 gaseous contaminants (ISO 14687-2) in hydrogen on 3 production processes: steam methane reforming (SMR) process with pressure swing adsorption (PSA) chlor-alkali membrane electrolysis process and water proton exchange membrane electrolysis process with temperature swing adsorption. The rationale behind the probability of contaminant presence according to process knowledge and existing barriers is highlighted. No contaminant was identified as possible or frequent for the three production processes except oxygen (frequent for chlor-alkali membrane process) carbon monoxide (frequent) and nitrogen (possible) for SMR with PSA. Based on it a hydrogen quality assurance plan following ISO 19880-8 can be devised to support hydrogen providers in monitoring the relevant contaminants.

<br/>Our industry is beginning its journey on the transition to providing the world with sufficient sustainable affordable and low emission energy.<br/><br/>Decarbonisation is now a key priority. Steps range from reducing emissions from traditional oil and gas operations to investing in renewable energy and supplementing natural gas supplies with greener gasses such as hydrogen.<br/><br/>This paper looks at the role hydrogen could play in decarbonisation.

Seizing the clean growth opportunity. The move to cleaner economic growth is one of the greatest industrial opportunities of our time. This Strategy will ensure Britain is ready to seize that opportunity. Our modern Industrial Strategy is about increasing the earning power of people in every part of the country. We need to do that while not just protecting but improving the environment on which our economic success depends. In short we need higher growth with lower carbon emissions. This approach is at the heart of our Strategy for clean growth. The opportunity for people and business across the country is huge. The low carbon economy could grow 11 per cent per year between 2015 and 2030 four times faster than the projected growth of the economy as a whole. This is spread across a large number of sectors: from low cost low carbon power generators to more efficient farms; from innovators creating better batteries to the factories putting them in less polluting cars; from builders improving our homes so they are cheaper to run to helping businesses become more productive. This growth will not just be seen in the UK. Following the success of the Paris Agreement where Britain played such an important role in securing the landmark deal the transition to a global low carbon economy is gathering momentum. We want the UK to capture every economic opportunity it can from this global shift in technologies and services.<br/>Our approach to clean growth is an important element of our modern Industrial Strategy: building on the UK’s strengths; improving productivity across the country; and ensuring we are the best place for innovators and new businesses to start up and grow. A good example of this is offshore wind where costs have halved in just a few years. A combination of sustained commitment – across different Governments – and targeted public sector innovation support harnessing the expertise of UK engineers working in offshore conditions and private sector ingenuity has created the conditions for a new industry to flourish while cutting emissions. We need to replicate this success in sectors across our economy. This Strategy delivers on the challenge that Britain embraced when Parliament passed the Climate Change Act. If we get it right we will not just deliver reduced emissions but also cleaner air lower energy bills for households and businesses an enhanced natural environment good jobs and industrial opportunity. It is an opportunity we will seize.

The UK is a world leader in the fight against climate change. In 2019 we became the first major economy in the world to pass laws to end its contribution to global warming by 2050. Reaching this target will require extensive systematic change across all sectors including industry. We must get this change right as the products made by industry are vital to life in the UK and the sector supports local economies across the country.<br/><br/>This strategy covers the full range of UK industry sectors: metals and minerals chemicals food and drink paper and pulp ceramics glass oil refineries and less energy-intensive manufacturing. These businesses account for around one sixth of UK emissions and transformation of their manufacturing processes is key if we are to meet our emissions targets over the coming decades (BEIS Final UK greenhouse gas emissions from national statistics: 1990 to 2018: Supplementary tables 2020).<br/><br/>The aim of this strategy is to show how the UK can have a thriving industrial sector aligned with the net zero target without pushing emissions and business abroad and how government will act to support this. An indicative roadmap to net zero for UK industry based on the content in this strategy is set out at the end of this summary. This strategy is part of a series of publications from government which combined show how the net zero transition will take place across the whole UK economy.

Thermal hazards from an under-expanded (900 bar) hydrogen jet fire have been numerically investigated. The simulation results have been compared with the flame length and radiative heat flux measured for the horizontal jet fire experiment conducted at INERIS. The release blowdown characteristics have been modelled using the volumetric source as an expanded implementation of the notional nozzle concept. The CFD study employs the realizable k-ε model for turbulence and the Eddy Dissipation Concept for combustion. Radiation has been taken into account through the Discrete Ordinates (DO) model. The results demonstrated good agreement with the experimental flame length. Performance of the model shall be improved to reproduce the radiative properties dynamics during the first stage of the release (time < 10 s) whereas during the remaining blowdown time the simulated radiative heat flux at five sensors followed the trend observed in the experiment.

A key element in the safe operation of a modern gas distribution system is gas detection. The addition of hydrogen to natural gas will alter the characteristics of the fuel and therefore its impact on gas detection must be considered. It is important that gas detectors remain sufficiently sensitive to the presence of hydrogen and natural gas mixtures and that they do not lead to false readings. This paper presents analyses of work performed as part of the Office for Gas and Energy Markets (OFGEM) funded HyDeploy project on the response of various natural gas industry detectors to blended mixtures up to 20 volume percent (vol%) of hydrogen in natural gas. The scope of the detectors under test included survey instruments and personal monitors that are used in the gas industry. Four blend ratios were analysed (0 10 15 and 20 vol% hydrogen in natural gas). The laboratory testing undertaken investigated the following:

• Flammable response to blends in the ppm range (0-0.2 vol%);
• Flammable response to blends in the lower explosion limit range (0.2-5 vol%);
• Flammable response to blends in the volume percent range (5-100 vol%);
• Oxygen response to blends in the volume percent range (0-25 vol%); and
• Carbon monoxide response to blends in the ppm range (0-1000 ppm).

Catalytic and thermal conductivity based flammable detectors in the volume percent range are as expected affected in the form of a relative increase in output. All of the carbon monoxide detectors tested were found to be cross-sensitive to hydrogen in the blended mixtures tested at levels which have the potential to cause false alarms at current permissible leakage rates. In summary a number of measurement ranges across multiple detectors commonly used in the gas industry have been found to be cross-sensitive to hydrogen in natural gas blends to differing degrees. This required the HyDeploy project to select alternative instruments for the purpose of gas detection as part of the trial. This paper relates to the preparatory work to introduce hydrogen into the Keele closed network.

<br/>Cyclic Voltammetry Measurements performed on a Cobaloxime Catalyst designed for photochemical hydrogen production.

This report summarises key themes emerging from the Energy Technologies Institute’s (ETI) project ‘Enabling efficient networks for low carbon futures’. The project aimed to explore the options for reforming the governance and regulatory arrangements to enable major changes to and investment in the UK’s energy network infrastructures. ETI commissioned four expert perspectives on the challenges and options facing the UK.

This paper proposes that whilst the exact pathway to decarbonising heat in the UK is not yet clear there are a range of actions that could be taken in the next ten years to shift heat onto the right route to meet our 2050 net zero obligation. We already possess many of the skills and technologies required but there are a number of significant barriers preventing a spontaneous movement towards low carbon heat on the scale required – a starting impulse is needed.<br/><br/>Energy efficiency and low carbon heating have the potential to radically improve the quality of life of not just the poorest in our society but all residents of the United Kingdom. With the right approach the decarbonisation of heat can improve health outcomes for millions create new jobs in manufacturing and construction reduce air pollution in our cities and reduce the burden on our health service. This in addition to leading the world in mitigating the climate emergency.

HyNet North West (NW) is an innovative integrated low carbon hydrogen production distribution and carbon capture utilisation and storage (CCUS) project. It provides hydrogen distribution and CCUS infrastructure across Liverpool Manchester and parts of Cheshire in support of the Government’s Clean Growth Strategy (CGS) and achievement of the UK’s emissions reduction targets.<br/>Hydrogen will be produced from natural gas and sent via a new pipeline to a range of industrial sites for injection as a blend into the existing natural gas network and for use as a transport fuel. Resulting carbon dioxide (CO2) will be captured and together with CO2 from local industry which is already available sent by pipeline for storage offshore in the nearby Liverpool Bay gas fields. Key data for the Project are presented in Table ES1.

Capturing and sealing away carbon dioxide released from industrial processes and electricity generation is acknowledged internationally to be potentially a winning intervention in the battle against climate change. The collected technologies that make up Carbon Capture and Storage (CCS) could remove more than 90% of the carbon emissions from energy intensive industries and electricity production. In power generation CCS not only provides low-carbon output but it also preserves capacity in fossil fuel-fired plant to respond to shifts in demand. This is a near-unique combination that could mitigate the different shortcomings of harnessing the wind the sun or nuclear fission.<br/>CCS could clear a path to the UK’s carbon reduction targets; secure its energy supplies; and reduce the cost of those achievements. With CCS in play a low-carbon future with secure energy supplies becomes affordable. However without our research has found that the costs of meeting the UK’s lowcarbon targets could double to £60bn a year by 2050 at today’s prices.<br/>However CCS has to be honed technically and commercially before it can become a reality. ETI supported by its partners has made important progress and continues to do so.

Our gas network is one of the best developed in the world providing safe secure affordable energy to homes and businesses across the UK.<br/><br/>To meet the biggest energy challenge of our generation – making deep cuts to carbon emissions by 2050 – it needs to embrace new technology which builds on these strengths and delivers the integrated flexible network of the future. This briefing sets out how it is already doing that. Take a look at our Gas Futures Messages booklet attached.

The Hydrogen Taskforce welcomes the opportunity to submit evidence to the Business Energy and Industrial Strategy Committee’s inquiry into decarbonising heat in homes. It is the Taskforce’s view that:

• Decarbonising heat is one of the biggest challenges that the UK faces in meeting Net Zero and several solutions will be required;
• Hydrogen can play a valuable role in reducing the cost of decarbonising heat. Its high energy density enables it to be stored cost effectively at scale providing system resilience;
• Hydrogen heating can be implemented at minimal disruption to the consumer;
• The UK holds world-class advantages in hydrogen production distribution and application; and
• Other economies are moving ahead in the development of this sector and the UK must respond.

In March 2020 the Taskforce has defined a set of policy recommendations for Government which are designed to ensure that hydrogen can scale to meet the future demands of a net zero energy system: • Development of a cross departmental UK Hydrogen Strategy within UK Government;• Commit £1bn of capex funding over the next spending review period to hydrogen production storage and distribution projects;• Develop a financial support scheme for the production of hydrogen in blending industry power and transport.• Amend Gas Safety Management Regulations (GSMR) to enable hydrogen blending and take the next steps towards 100% hydrogen heating through supporting public trials and mandating 100% hydrogen-ready boilers by 2025; and• Commit to the support of 100 Hydrogen Refuelling Stations (HRS) by 2025 to support the rollout of hydrogen transport.





You can download the whole document from the Hydrogen Taskforce website here

Outline

This is the eighth annual Progress Report to the Scottish Parliament required by Scottish Ministers under the Climate Change (Scotland) Act 2009. It assesses Scotland’s progress in achieving its legislated targets to reduce greenhouse gas emissions

Overall greenhouse gas emissions reduced by 3% in 2017 compared to a 10% fall in 2016. The fall was again led by the power sector due in large part to Scotland’s first full year of coal-free electricity generation. Recent performance in other sectors shows only incremental improvement at best and unless emissions reductions are delivered economy-wide Scotland is at risk of missing its new interim target of a 56% reduction in emissions by 2020.

Key findings

Setting a net-zero greenhouse gas emissions target for 2045 represents a step-change in ambition for Scotland.

The Scottish Parliament’s 2030 target to reduce emissions by 75% will be extremely challenging to meet. It must be backed up by steps to drive meaningful emissions reductions immediately.

Scotland’s Programme for Government 2019-20 alongside other recent policies sent a clear signal that the Scottish Government is taking its more ambitious targets seriously but there is much more to do.

Scotland’s ability to deliver its net-zero target is contingent on action taken in the UK and vice versa.

The rare earth metals have been identified by the European Union and the United States as being at greatest supply risk of all the materials for clean energy technologies. Of particular concern are neodymium and dysprosium both of which are employed in neodymium–iron–boron based magnets. Recycling of magnets based on these materials and contained within obsolete electronic equipment could provide an additional and secure supply. In the present work hydrogen has been employed as a processing agent to decrepitate sintered neodymium–iron–boron based magnets contained within hard disk drives into a demagnetised hydrogenated powder. This powder was then extracted mechanically from the devices with an extraction efficiency of 90 ± 5% and processed further using a combination of sieves and ball bearings to produce a powder containing <330 parts per million of nickel contamination. It is then possible for the extracted powder to be re-processed in a number of ways namely directly by blending and re-sintering to form fully dense magnets by Hydrogenation Disproportionation Desorption Recombination processing to produce an anisotropic coercive powder suitable for bonded magnets by re-melting; or by chemical extraction of the rare earth elements from the alloy. For example it was shown that by the re-sintering route it was possible to recover >90% of the magnetic properties of the starting material with significantly less energy than that employed in primary magnet production. The particular route used will depend upon the magnetic properties required the level of contamination of the extracted material and the compositional variation of the feedstock. The various possibilities have been summarised in a flow diagram.

Underexpanded jet releases from circular nozzles have been studied extensively both experimentally and numerically. However jet releases from rectangular openings have received much less attention and information on their dispersion behaviour is not as widely available. In this paper Computational Fluid Dynamics (CFD) is used to assess the suitability of using a pseudo-source approach to model jet releases from rectangular openings. A comparative study is performed to evaluate the effect of nozzle shape on jet structure and dispersion characteristics for underexpanded hydrogen jet releases. Jet releases issuing from a circular nozzle and rectangular nozzles with aspect ratios ranging from two to eight are modelled including resolution of the near-field behaviour. The experimental work of Ruggles and Ekoto (2012 2014) is used as a basis for validating the modelling approach used and an additional case study in which jets with a stagnation-to-ambient pressure ratio of 300:1 are modelled is also performed. The CFD results show that for the 10:1 pressure ratio release the hazard volume and hazard distance remain largely unaffected by nozzle shape. For the higher pressure release the hazard volume is larger for the rectangular nozzle releases than the equivalent release through a circular orifice though the distance to lower flammability limit is comparable across the range of nozzle shapes considered. For both of the release pressures simulated the CFD results illustrate that a pseudo-source approach produces conservative results for all nozzle shapes considered. This finding has useful practical implications for consequence analysis in industrial applications such as the assessment of leaks from flanges and connections in pipework.

Purpose- To present an overview of the research and development carried out in a European funded framework 7 (FP7) project called SafeHPower for the implementation of neutron radiography to inspect fatigue cracks in vehicle and storage hydrogen fuel tanks. Project background– Hydrogen (H2) is the most promising replacement fuel for road transport due to its abundance efficiency low carbon footprint and the absence of harmful emissions. For the mass market of hydrogen to take off the safety issue surrounding the vehicle and storage hydrogen tanks needs to be addressed. The problem is the residual and additional stresses experienced by the tanks during the continuous cyclic loading between ambient and storage pressure which can result in the development of fatigue cracks. Steel tanks used as storage containers at service stations and depots and/or the composite tanks lined with steel are known to suffer from hydrogen embrittlement (HE). Another issue is the explosive nature of hydrogen (when it is present in the 18-59% range) where it is mixed with oxygen which can lead to catastrophic consequences including loss of life. Monitoring systems that currently exist in the market impose visual examination tests pressure tests and hydrostatic tests after the tank installation [1] [2]. Three inspection systems have been developed under this project to provide continuous monitoring solutions. Approach and scope- One of the inspection systems based on the neutron radiography (NR) technology that was developed in different phases with the application of varied strategies has been presented here. Monte Carlo (MCNP) simulation results to design and develop a bespoke collimator have been presented. A limitation of using an inertial electrostatic Deuterium-Tritium (D-T) pulsed neutron generator for fast neutron radiography has been discussed. Radiographs from the hydrogen tank samples obtained using thermal neutrons from a spallation neutron source at ISIS Rutherford laboratory UK have been presented. Furthermore radiograph obtained using thermal neutrons from a portable D-T neutron generator has been presented. In conclusion a proof in principle has been made to show that the defects in the hydrogen fuel tank can be detected using thermal neutron radiography.

Smart energy hubs (Smart Hubs) equipped with Vehicle-to-Grid (V2G) charging photovoltaic (PV) energy generation and hydrogen storage capabilities are an emerging technology with potential to alleviate the impact of electric vehicles (EV) on the electricity grid. Their operation however is characterised by intermittent PV energy generation as well as uncertainties in EV traffic and driver preference. These uncertainties when combined with the need to maximise their financial return while guaranteeing driver satisfaction yields a challenging decision-making problem. This paper presents a novel Monte-Carlo-based modelling and computational framework for simulating the operation of Smart Hubs — providing a means for a holistic assessment of their technical and financial viability. The framework utilises a compact and representative mathematical model accounting for power losses PV module degradation variability in EV uptake price inflation driver preference and diversity in charge points and EVs. It provides a comprehensive approach for dealing with uncertainties and dependencies in EV data while being built on an energy management algorithm that maximises revenue generation ensures driver satisfaction and preserves battery life. The energy management problem is formulated as a mixed-integer linear programming problem constituting a business case that includes an adequate V2G reward model for drivers. To demonstrate its applicability the framework was used to assess the financial viability of a fleet management site for various caps on vehicle stay at the site. From the assessment controlled charging was found to be more financially rewarding in all cases yielding between 1.7% and 3.1% more revenue than uncontrolled charging. The self-consumption of the site was found to be nearly 100% due mainly to local load shifting and dispatchable hydrogen generation. V2G injection was however negligible — suggesting its unattractiveness for sites that do not participate in the demand side response market. Overall the numerical results obtained validate the applicability of the proposed framework as a decision-support tool in the sustainable design and operation of Smart Hubs for EV charging.

The Energy Research Accelerator (ERA) and the Birmingham Energy Institute have launched a policy commission to examine the state of play barriers challenges and opportunities for Energy from Waste (EfW) to form part of the regional energy circular economy in the Midlands. This policy commission explores the case for regional investment whilst helping shape the regional local government and industry thinking surrounding critical issues such as fuel poverty and poor air quality.

The Challenge

Tackling climate change is one of the most pressing issues of our time. To follow the path for limiting global warming below 2^ᵒC set out in the 2015 Paris agreement requires significant reduction in greenhouse gas emissions. The UK has committed to bring all greenhouse gas emissions to net zero by 2050 requiring action at a local regional and national level to transition to a zero carbon economy.

To decarbonise and decentralise the UK’s energy system we must implement technologies that provide energy supply solutions across the UK.

In the Midlands many industrial sites are unable to access supply of affordable clean and reliable energy to meet their demands.

Energy from Waste (EfW) could offer a solution to the Midlands based industrial sites. EfW sites provide affordable secure energy supply solutions that form part of a developing circular economy. EfW reduces our reliance on landfills and obtains the maximum value from our waste streams. There are a number of merging technologies that could potentially play an important role which treats waste as a resource properly integrated into an energy and transport system and fully respects the potential of linking in the circular economy.

Investment into EfW infrastructure in the region could lead to job creation and economic growth and could help provide inward investment needed to redevelop old industrial sites and retiring power stations. However for EfW to be part of a net-zero energy system (either in transition or long-term) technologies and processes are needed that reduce the current carbon emissions burden.

EfW could play a significant role in the net zero carbon transition in the Midlands supplying heat power and green fuels and solve other problems - the region has some of the highest levels of energy/fuel poverty and poor air quality in the UK.  The policy commission will help shape the regional local government and industry thinking surrounding this important topic.

Report Recommendations

Recovery Resource Cluster

The EfW policy commission proposes three major areas where it believes that government investment would be highly beneficial

• Building a network of local and regional Resource Recovery Clusters
• Creating a National Centre for the Circular Economy
• Launching an R&D Grand Challenge to develop small-scale circular carbon capture technologies.

The Resource Recovery Clusters (RRC) will be developed on post-industrial sites which could produce significant environmental economic and regeneration benefits. The RRCs combine a spread of EfW and recycling technologies with businesses that can consume their cheap electricity heat fuels CO₂ and material outputs.

The National Centre for the Circular Economy would analyse material flows throughout the economy down to regional and local levels and develop deep expertise in recycling and EfW technologies. The CCE would also provide expert guidance and support for local authorities as they develop local or regional strategies and planning frameworks.

The R&D Grand Challenge aims to make big advances in small-scale carbon capture technologies in order to turn 100% of CO₂ produced through the process of converting waste to energy into useful products. This is very important for areas such as the Midlands which are remoted from depleted oil and gas reservoirs.

Hydrogen could be used as a ‘cleaner’ cooking fuel particularly in communities that rely on biomass and fossil fuels to reduce local pollution and related health effects. However hydrogen must be produced using sustainable feedstocks and energy sources to ensure that local impacts are not reduced at the expense of other impacts generated elsewhere in the life cycle. To this end this paper evaluates life cycle environmental impacts of renewable hydrogen produced in a proton-exchange membrane electrolyser using solar energy. The aim of the study is to find out if hydrogen produced in this system and used as a cooking fuel is environmentally sustainable in comparison with conventional cooking fuels typically used in developing countries such as liquefied petroleum gas (LPG) charcoal and firewood. The results suggest that hydrogen would reduce the climate change impact by 2.5–14 times to 0.04 kg CO₂ eq./MJ compared to firewood (0.10 kg CO2 eq./MJ) and LPG (0.57 kg CO₂ eq./MJ). Some other impacts would also be lower by 6%–35 times including depletion of fossil fuels summer smog and health effects from emissions of particulates both locally and across the rest of the life cycle. However some other impacts would increase by 6%–6.7 times such as depletion of metals and freshwater and marine ecotoxicity. These are mainly due to the solar photovoltaic panels used to generate power for the electrolyser. In terms of the local impacts the study suggests that hydrogen would reduce local pollution and related health impacts by 8%–35 times. However LPG is still environmentally a better option than hydrogen for most of the impacts both at the point of use and on a life cycle basis.

Expectations for energy storage are high but large-scale underground hydrogen storage in porous media (UHSP) remains largely untested. This article identifies and discusses the scientific challenges of hydrogen storage in porous media for safe and efficient large-scale energy storage to enable a global hydrogen economy. To facilitate hydrogen supply on the scales required for a zero-carbon future it must be stored in porous geological formations such as saline aquifers and depleted hydrocarbon reservoirs. Large-scale UHSP offers the much-needed capacity to balance inter-seasonal discrepancies between demand and supply decouple energy generation from demand and decarbonise heating and transport supporting decarbonisation of the entire energy system. Despite the vast opportunity provided by UHSP the maturity is considered low and as such UHSP is associated with several uncertainties and challenges. Here the safety and economic impacts triggered by poorly understood key processes are identified such as the formation of corrosive hydrogen sulfide gas hydrogen loss due to the activity of microbes or permeability changes due to geochemical interactions impacting on the predictability of hydrogen flow through porous media. The wide range of scientific challenges facing UHSP are outlined to improve procedures and workflows for the hydrogen storage cycle from site selection to storage site operation. Multidisciplinary research including reservoir engineering chemistry geology and microbiology more complex than required for CH₄ or CO₂ storage is required in order to implement the safe efficient and much needed large-scale commercial deployment of UHSP.

Concerns about greenhouse gases as well as the price and security of oil supply have acted as a spur to sustainable automobile development. The hydrogen fuel cells electric vehicle (HFCEV) is generally recognised by leading automobile manufacturers and scientists as one of the optimum technologies for long-term future low carbon vehicle. In a typical HFCEV power train a DC–DC converter is required to balance the voltage difference between the fuel cells (FCs) stack and batteries. However research shows that a considerable amount of energy generated by the hydrogen FCs stack is deplete during this conversion process as heat. This experiment aims to improve the power train efficiency by eliminating the DC–DC converter by finding the best combination of FC stack and batteries matching the size and capacity of the electrical components.

Humans directly or indirectly generate over 105 billion tonnes of organic wastes globally each year all of which release harmful methane and other greenhouse gas emissions directly into the atmosphere as they decompose. These organic wastes include food waste sewage and garden wastes food and drink processing wastes and farm and agricultural wastes. Today only 2% of these are treated and recycled.



By simply managing these important bioresources more effectively we can cut global Greenhouse Gas (GHG) emissions by 10% by 2030. This report maps out how the global biogas industry can enable countries to deliver a 10% reduction in global GHG emissions by 2030. The pathways put humanity back on track to deliver by 2030 on the ambitions of both the Paris Agreement and UN Sustainable Development Goals (SDGs).



The report and the executive summary can be downloaded at this link

In super duplex stainless steels (SDSSs) both austenite and ferrite are susceptible to hydrogen embrittlement however there is a lack of understanding into the effect of hydrogen in each phase. In this study in neutron diffraction was applied on hydrogen-charged (H-charged) samples to investigate the hydrogen embrittlement behaviour in super duplex stainless steels. The result reveals that austenite maintains good plasticity during tensile testing whilst a loss of it is realised in ferrite. Fractography analysis reveals the diffusion of hydrogen induced a brittle-to-ductile transition from the sample surface towards the centre; hydrogen embrittlement vanishes as the specimen’s centre is approached while it is demonstrated to disappear first in austenite but not in ferrite. This transition can be predicted by applying a physics-based hydrogen embrittlement model which incorporates the effects of hydrogen concentration hydrogen diffusivity residual stress loading state and temperature. The present work demonstrates the dissimilar susceptibility of austenite and ferrite to hydrogen embrittlement providing a tool to describe it.

This report identifies and assesses a range of high-level deployment options for industrial carbon capture usage and storage (CCUS) technology located in non-clustered ‘dispersed’ sites that are isolated from potential carbon dioxide transport infrastructure in the UK.

It provides:

• an identification of the challenges and barriers to CCUS deployment specifically at these dispersed sites
• an appraisal of the range of high-level options for CCUS deployment and the risks associated with each challenge
• an assessment of the most promising options based on their cost risk and emission reduction potential
• BEIS commissioned Element Energy to produce the report.

Currently the technology associated with charging stations for electric vehicles (EV) needs to be studied and improved to further encourage its implementation. This paper presents a new energy management system (EMS) based on a Biogeography-Based Optimization (BBO) algorithm for a hybrid EV charging station with a configuration that integrates Z-source converters (ZSC) into medium voltage direct current (MVDC) grids. The EMS uses the evolutionary BBO algorithm to optimize a fitness function defining the equivalent hydrogen consumption/generation. The charging station consists of a photovoltaic (PV) system a local grid connection two fast charging units and two energy storage systems (ESS) a battery energy storage (BES) and a complete hydrogen system with fuel cell (FC) electrolyzer (LZ) and hydrogen tank. Through the use of the BBO algorithm the EMS manages the energy flow among the components to keep the power balance in the system reducing the equivalent hydrogen consumption and optimizing the equivalent hydrogen generation. The EMS and the configuration of the charging station based on ZSCs are the main contributions of the paper. The behaviour of the EMS is demonstrated with three EV connected to the charging station under different conditions of sun irradiance. In addition the proposed EMS is compared with a simpler EMS for the optimal management of ESS in hybrid configurations. The simulation results show that the proposed EMS achieves a notable improvement in the equivalent hydrogen consumption/generation with respect to the simpler EMS. Thanks to the proposed configuration the output voltage of the components can be upgraded to MVDC while reducing the number of power converters compared with other configurations without ZSC.

Globally the accelerating use of renewable energy sources enabled by increased efficiencies and reduced costs and driven by the need to mitigate the effects of climate change has significantly increased research in the areas of renewable energy production storage distribution and end-use. Central to this discussion is the use of hydrogen as a clean efficient energy vector for energy storage. This review by experts of Task 32 “Hydrogen-based Energy Storage” of the International Energy Agency Hydrogen TCP reports on the development over the last 6 years of hydrogen storage materials methods and techniques including electrochemical and thermal storage systems. An overview is given on the background to the various methods the current state of development and the future prospects. The following areas are covered; porous materials liquid hydrogen carriers complex hydrides intermetallic hydrides electro-chemical storage of energy thermal energy storage hydrogen energy systems and an outlook is presented for future prospects and research on hydrogen-based energy storage

On 26 June the World Energy Council held a webinar presenting the results of its latest Innovation Insights Brief on hydrogen engaging three key experts on the topic:



Nigel Brandon Dean of the Faculty of Engineering Imperial College London



Craig Knight Director of Industrial Solutions Horizon Fuel Cell Technology



Dan Sadler H21 Project Manager for Equinor



During the webinar the experts answered a series of policy technical and safety questions from the audience. The webinar started with a poll to get a sense of which sectors attendees saw hydrogen playing a key role in 2040 - 77% chose industrial processes 54% mobility and 31% power generation. The questions ranged from the opportunities and limitations of blending hydrogen with natural gas to safety concerns surrounding hydrogen.



KEY HIGHLIGHTS:

How much hydrogen can be blended with natural gas depends on the rules and regulation of each country. The general consensus is that blending 10% by volume of hydrogen presents no safety concerns or specific difficulties. This would provide an opportunity to develop low hydrogen markets. Nevertheless blending should not be the end destination. It is not sufficient to meet carbon abatement targets.



Low carbon ammonia has a role to play in the new hydrogen economy. It is a proven and understood technology which is easier to move around the world and could be used directly as ammonia or cracked back into hydrogen.



One of the main focus today should be to replace grey hydrogen with green hydrogen in existing supply chains as there would be no efficiency losses in the process.



In China the push for hydrogen is transport-related. This is driven by air quality and energy independence concerns. In the next 10 years the full life cost of fuel cell electric vehicles (FCEVs) is expected to be lower than for internal combustion engines. This is due to the fact that FCEVs require less maintenance and that the residual value in the fuel cells is relatively high. At the end of life 95% of the platinum in fuel cells can be repurposed.



FCEVs should not be regarded as competing with battery electric vehicles they sit next to each other on product maps. FCEVs can benefit from the all of the advances in electric drive train systems and electric motors.



To close the webinar attendees were asked whether hydrogen was going through another hype cycle or if it was here to stay. 10% answered hype and 90% here to stay.

Carbon capture and storage is expected to play a pivotal role in achieving the emission reduction targets established by the Paris Agreement. However the most mature technologies have been shown to reduce the net efficiency of fossil fuel-fired power plants by at least 7% points increasing the electricity cost. Carbonate looping is a technology that may reduce these efficiency and economic penalties. Its maturity has increased significantly over the past twenty years mostly due to development of novel process configurations and sorbents for improved process performance. This review provides a comprehensive overview of the calcium looping concepts and statistically evaluates their techno-economic feasibility. It has been shown that the most commonly reported figures for the efficiency penalty associated with calcium looping retrofits were between 6 and 8% points. Furthermore the calcium-looping-based coal-fired power plants and sorption-enhanced hydrogen production systems integrated with combined cycles and/or fuel cells have been shown to achieve net efficiencies as high as 40% and 50–60% respectively. Importantly the performance of both retrofit and greenfield scenarios can be further improved by increasing the degree of heat integration as well as using advanced power cycles and enhanced sorbents. The assessment of the economic feasibility of calcium looping concepts has indicated that the cost of carbon dioxide avoided will be between 10 and 30 € per tonne of carbon dioxide and 10–50 € per tonne of carbon dioxide in the retrofit and greenfield scenarios respectively. However limited economic data have been presented in the current literature for the thermodynamic performance of calcium looping concepts.

As part of Work Package 2 (WP2) of the Hy4Heat programme DNV produced a substantive report regarding colourant within a potential hydrogen gas network within the UK. Considering the advances within the hydrogen industry over the past year this covering document provides an update to the results as presented by DNV based on current industry progress and research.

• Advancements have been made in the understanding of key topics:
• Flame visibility and supervision
• Health and safety of colourant additives
• Production of Nitrogen Oxides (NOx)
• Likelihood of ignition from domestic electrical installations
• Nature of gas escapes

The Hydrogen Colourant report was a study to determine if there is a requirement for adding a colourant to hydrogen to ensure that safe burning and user acceptance is achieved and to investigate the optimum solution if a colourant is required. The recommendation is that adding colourant to a future hydrogen gas network for use within buildings is not necessary if engineering measures are put in place to enable safe appliance operation."

Power to hydrogen (P2H) provides a promising solution to the geographic mismatch between sources of renewable energy and the market due to its technological maturity flexibility and the availability of technical and economic data from a range of active demonstration projects. In this review we aim to provide an overview of the status of P2H analyze its technical barriers and solutions and propose potential opportunities for future research and industrial demonstrations. We specifically focus on the transport of hydrogen via natural gas pipeline networks and end-user purification. Strong evidence shows that an addition of about 10% hydrogen into natural gas pipelines has negligible effects on the pipelines and utilization appliances and may therefore extend the asset value of the pipelines after natural gas is depleted. To obtain pure hydrogen from hydrogen-enriched natural gas (HENG) mixtures end-user separation is inevitable and can be achieved through membranes adsorption and other promising separation technologies. However novel materials with high selectivity and capacity will be the key to the development of industrial processes and an integrated membrane-adsorption process may be considered in order to produce high-purity hydrogen from HENG. It is also worth investigating the feasibility of electrochemical separation (hydrogen pumping) at a large scale and its energy analysis. Cryogenics may only be feasible when liquefied natural gas (LNG) is one of the major products. A range of other technological and operational barriers and opportunities such as water availability byproduct (oxygen) utilization and environmental impacts are also discussed. This review will advance readers’ understanding of P2H and foster the development of the hydrogen economy.

The opportunities and challenges to reducing industrial energy demand and carbon dioxide (CO₂ ) emissions in the Chemicals sector are evaluated with a focus on the situation in the United Kingdom (UK) although the lessons learned are applicable across much of the industrialised world. This sector can be characterised as being heterogeneous; embracing a diverse range of products (including advanced materials cleaning fluids composites dyes paints pharmaceuticals plastics and surfactants). It sits on the boundary between energy-intensive (EI) and non-energy-intensive (NEI) industrial sectors. The improvement potential of various technological interventions has been identified in terms of their energy use and greenhouse gas (GHG) emissions. Currently-available best practice technologies (BPTs) will lead to further short-term energy and CO₂ emissions savings in chemicals processing but the prospects for the commercial exploitation of innovative technologies by mid-21st century are far more speculative. A set of industrial decarbonisation ‘technology roadmaps’ out to the mid-21st Century are also reported based on various alternative scenarios. These yield low-carbon transition pathways that represent future projections which match short-term and long-term (2050) targets with specific technological solutions to help meet the key energy saving and decarbonisation goals. The roadmaps’ contents were built up on the basis of the improvement potentials associated with various processes employed in the chemicals industry. They help identify the steps needed to be undertaken by developers policy makers and other stakeholders in order to ensure the decarbonisation of the UK chemicals industry. The attainment of significant falls in carbon emissions over this period will depends critically on the adoption of a small number of key technologies [e.g. carbon capture and storage (CCS) energy efficiency techniques and bioenergy] alongside a decarbonisation of the electricity supply.

Low-carbon hydrogen has the potential to play a significant role in tackling climate change and poor air quality. This policy briefing considers how hydrogen could be produced at a useful scale to power vehicles heat homes and supply industrial processes.

Four groups of hydrogen production technologies are examined:

Thermochemical Routes to Hydrogen

These methods typically use heat and fossil fuels. Steam methane reforming is the dominant commercial technology and currently produces hydrogen on a large scale but is not currently low carbon. Carbon capture is therefore essential with this process. Innovative technology developments may also help and research is underway. Alternative thermal methods of creating hydrogen indicate biomass gasification has potential. Other techniques at a low technology readiness level include separation of hydrogen from hydrocarbons using microwaves.

Electrolytic Routes to Hydrogen

Electrolytic hydrogen production also known as electrolysis splits water into hydrogen and oxygen using electricity in an electrolysis cell. Electrolysis produces pure hydrogen which is ideal for low temperature fuel cells for example in electric vehicles. Commercial electrolysers are on the market and have been in use for many years. Further technology developments will enable new generation electrolysers to be commercially competitive when used at scale with fluctuating renewable energy sources.

Biological Routes to Hydrogen

Biological routes usually involve the conversion of biomass to hydrogen and other valuable end products using microbial processes. Methods such as anaerobic digestion are feasible now at a laboratory and small pilot scale. This technology may prove to have additional or greater impact and value as route for the production of high value chemicals within a biorefinery concept.

Solar to Fuels Routes to Hydrogen

A number of experimental techniques have been reported the most developed of which is ‘solar to fuels’ - a suite of technologies that typically split water into hydrogen and oxygen using solar energy. These methods have close parallels with the process of photosynthesis and are often referred to as ‘artificial photosynthesis’ processes. The research is promising though views are divided on its ultimate utility. Competition for space will always limit the scale up of solar to fuels.

The briefing concludes that steam methane reforming and electrolysis are the most likely technologies to be deployed to produce low-carbon hydrogen at volume in the near to mid-term providing that the challenges of high levels of carbon capture (for steam methane reforming) and cost reduction and renewable energy sources (for electrolysis) can be overcome.

There is a growing conversation around the role that hydrogen can play in the future of the UK and how to best harness its potential to secure jobs show climate leadership promote industrial competitiveness and drive innovation. The Government’s ‘Ten Point Plan for a Green Industrial Revolution’ included hydrogen as one of its ten actions targeting 5GW of ‘low carbon’ hydrogen production by 2030. Britain is thus joining the EU US Japan Germany and a host of other countries seeking to be part of the hydrogen economy of the future.<br/><br/>A focus on clean green hydrogen within targeted sectors and hubs can support multiple Government goals – including demonstrating climate leadership reducing regional inequalities through the ‘levelling up’ agenda and ensuring a green and cost-effective recovery from the coronavirus pandemic which prioritises jobs and skills. A strategic hydrogen vision must be honest and recognise where green hydrogen does not present the optimal pathway for decarbonisation – for instance where alternative solutions are already readily available for roll-out are more efficient and cost-effective. A clear example is hydrogen use for heating where it is estimated to require around 30 times more offshore wind farm capacity than currently available to produce enough green hydrogen to replace all gas boilers as well as adding costs for consumers.<br/><br/>This paper considers the offer of hydrogen for key Government priorities – including an inclusive and resilient economic recovery from the pandemic demonstrating climate leadership and delivering for all of society across the UK. It assesses existing evidence and considers the risks and opportunities and how they might inform a strategic vision for the UK. Ahead of the forthcoming Hydrogen Strategy it sets expectations for Government and outlines key recommendations.

Titanium dioxide coatings have potential applications including photocatalysts for solar assisted hydrogen production solar water disinfection and self-cleaning windows. Herein we report the use of suspension plasma spraying (SPS) for the deposition of conformal titanium dioxide coatings. The process utilises a nanoparticle slurry of TiO₂ (ca. 6 and 12 nm respectively) in water which is fed into a high temperature plasma jet (ca. 7000–20 000 K). This facilitated the deposition of adherent coatings of nanostructured titanium dioxide with predominantly anatase crystal structure. In this study suspensions of nano-titanium dioxide made via continuous hydrothermal flow synthesis (CHFS) were used directly as a feedstock for the SPS process. Coatings were produced by varying the feedstock crystallite size spray distance and plasma conditions. The coatings produced exhibited ca. 90–100% anatase phase content with the emainder being rutile (demonstrated by XRD). Phase distribution was homogenous throughout the coatings as determined by micro-Raman spectroscopy. The coatings had a granular surface with a high specific surface area and consisted of densely packed agglomerates interspersed with some melted material. All of the coatings were shown to be photoactive by means of a sacrificial hydrogen evolution test under UV radiation and compared favourably with reported values for CVD coatings and compressed discs of P25.

The recommended minimum separation distances in IGEM/TD/1 were based on a research programme that studied the different ways in which a failure of one buried natural gas transmission pipeline can affect another similar pipeline installed adjacent to the first taking account of the initial pressure wave propagating through the ground the size of the ground crater produced and the threat of escalation from fire if the second pipeline is exposed. The methodology developed from the research was first published in 2010 and is implemented in a software program (“PROPHET”). The distances in IGEM/TD/1 are generally cautious and are essentially determined by the size of the ground crater produced by pipeline ruptures as predicted by the methodology.

To assess the impact of hydrogen transmission on the recommended separation distances the possibility of one pipeline transporting natural gas and the other transporting hydrogen was considered as well as both pipelines transporting hydrogen. The following steps were carried out to assess the impact of hydrogen transmission on parallel pipeline separation distances drawing on existing knowledge only:

• Estimate the ground pressure loading predicted from a hydrogen pipeline rupture.
• Consider the ground pressure effect on a parallel natural gas or hydrogen pipeline.
• Evaluate available ground crater formation models and assess if existing natural gas model is cautious for hydrogen.
• Consider effects of thermal loading due to hydrogen fires where recommended natural gas separation distances are not met.

The following conclusions were made as to whether the current methodology for natural gas is cautious when applied to hydrogen:

• Ground pressure loading: The current natural gas methodology is cautious.
• Ground pressure effects: The current natural gas methodology is applicable (no change for hydrogen).
• Ground crater formation: The current natural gas methodology is cautious for ruptures and applicable for punctures (almost no change for hydrogen).
• Thermal loading: The current natural gas methodology is cautious for the thermal loading from ruptures but not necessarily cautious for punctures. Calculations of the minimum flow velocity required to prevent failure of a natural gas pipeline are not cautious for hydrogen.

In summary the recommended minimum separation distances in IGEM/TD/1 for parallel natural gas pipelines should be cautious when applied to parallel hydrogen pipelines. However in cases where the recommended minimum separation distances are not met the calculations to predict the thermal loading and response of the exposed pipeline should take account of the properties of hydrogen as the natural gas results will not necessarily be cautious.

It is now well established that electrochemical systems can optimally perform only within a narrow range of temperature. Exposure to temperatures outside this range adversely affects the performance and lifetime of these systems. As a result thermal management is an essential consideration during the design and operation of electrochemical equipment and can heavily influence the success of electrochemical energy technologies. Recently significant attempts have been placed on the maturity of cooling technologies for electrochemical devices. Nonetheless the existing reviews on the subject have been primarily focused on battery cooling. Conversely heat transfer in other electrochemical systems commonly used for energy conversion and storage has not been subjected to critical reviews. To address this issue the current study gives an overview of the progress and challenges on the thermal management of different electrochemical energy devices including fuel cells electrolysers and supercapacitors. The physicochemical mechanisms of heat generation in these electrochemical devices are discussed in-depth. Physics of the heat transfer techniques currently employed for temperature control are then exposed and some directions for future studies are provided.

Heating and hot water within buildings account for almost a quarter of global energy consumption. Approximately 90% of this heat is derived directly from the combustion of fossil fuels primarily natural gas leading to the unabated emission of carbon dioxide. This paper assesses the environmental sustainability of a range of heating technologies and scenarios on a life cycle basis. The major technologies considered are natural gas boilers air source heat pumps hydrogen boilers and direct electric heaters. The scenarios use the UK as an example due to its status as a major economy with a legally-binding net-zero carbon target for 2050; they consider plausible future electricity and natural gas mixes including the potential growth of domestic shale gas. The environmental impacts are estimated using ReCiPe 2016. Current gas boilers have a climate change impact of 220 g CO₂ eq./kWh of heat which could fall to 64 g CO₂ eq./kWh for boilers fuelled by hydrogen derived from natural gas with carbon capture. Heat from electric air source heat pumps or hydrogen from electrolysis can achieve net zero with a decarbonised electricity mix but electrolysis has the highest energy demand of all options which leads to the highest impacts across 17 of the 19 categories. Despite their high carbon emissions gas boilers remain the lowest impact option across 12 categories as they avoid the impacts related to electricity generation including metal depletion toxicities and eutrophication. By 2050 the best performing scenario sees the climate change impact of the heating mix fall by 95%; this is achieved by prioritising electric air source heat pumps without hydrofluorocarbon refrigerants alongside demand reduction. The results show that if infrastructure and financial challenges can be overcome there are several viable decarbonisation strategies for heating with heat pumps offering the most environmentally sustainable option of those considered here. However increased renewable electricity demand may worsen some environmental impacts compared to natural gas boilers.

Hydrogen is receiving increasing attention as a versatile energy vector to help accelerate the transition to a decarbonised energy future. Gas turbines will continue to play a critical role in providing grid stability and resilience in future low-carbon power systems; however it is recognised that this role is contingent upon achieving increased thermal efficiencies and the ability to operate on carbon-neutral fuels such as hydrogen. An important consideration in the development of gas turbine combustors capable of operating with pure hydrogen or hydrogen-enriched natural gas are the significant changes in thermoacoustic instability characteristics associated with burning these fuels. This article provides a review of the effects of burning hydrogen on combustion dynamics with focus on swirl-stabilised lean-premixed combustors. Experimental and numerical evidence suggests hydrogen can have either a stabilising or destabilising impact on the dynamic state of a combustor through its influence particularly on flame structure and flame position. Other operational considerations such as the effect of elevated pressure and piloting on combustion dynamics as well as recent developments in micromix burner technology for 100% hydrogen combustion have also been discussed. The insights provided in this review will aid the development of instability mitigation strategies for high hydrogen combustion.

Hydrogen in the UK is beginning to shift from hypothetical debates to practical demonstration projects. An ever-growing evidence base has showcased how the costs of hydrogen and its barriers to entry are reducing such that it now has practical potential to contribute to the decarbonisation of the UK's energy sector.

Despite this hydrogen has yet to have wide commercial uptake due in part to a number of barriers where measurement plays a critical role. To accelerate the shift towards the hydrogen economy these challenges have been identified and prioritised by NPL.

The report Energy transition: Measurement needs within the hydrogen industry outlines the challenges identified. The highest priority issues are:

• Material development for fuel cells and electrolysers to reduce costs and assess critical degradation mechanisms – extending lifetime and durability is key to the commercialisation of these technologies.
• Impact assessment of added odorant to hydrogen to aid leak detection. Measurement of its impact during pipeline transportation and on the end-use application (particularly fuel cell technology) will be important to provide assurance that it will not affect lifetime and durability.
• Determination of the blend ratio when hydrogen is mixed with natural gas in the gas grid. Accurate flow rate measurement and validated metering methods are needed to ensure accurate billing of the consumer.
• Measurement of the combustion properties of hydrogen including flame detection and propagation temperature and nitrogen oxides (NOx) emissions should it be used for heat applications to ensure existing and new appliances are suitable for hydrogen.
• Assessment of the suitability of existing gas infrastructure and materials for hydrogen transportation. Building an understanding of what adaptations might need to be made to avoid for example air permeation metal embrittlement and hydrogen leakage.
• Validated techniques for hydrogen storage which will require measurement of the efficiency and capacity of each mechanism through robust metering leakage detection and purity analysis to ensure they are optimised for the storage of hydrogen gas.

These challenges were identified through an industry-wide workshop in-depth interviews and consultation with key stakeholders within the hydrogen industry

This Document can be downloaded from their website

The virtual energy storage system (VESS) is one of the emerging novel concepts among current energy storage systems (ESSs) due to the high effectiveness and reliability. In fact VESS could store surplus energy and inject the energy during the shortages at high power with larger capacities compared to the conventional ESSs in smart grids. This study investigates the optimal operation of a multi-carrier VESS including batteries thermal energy storage (TES) systems power to hydrogen (P2H) and hydrogen to power (H2P) technologies in hydrogen storage systems (HSS) and electric vehicles (EVs) in dynamic ESS. Further demand response program (DRP) for electrical and thermal loads has been considered as a tool of VESS due to the similar behavior of physical ESS. In the market three participants have considered such as electrical thermal and hydrogen markets. In addition the price uncertainties were calculated by means of scenarios as in stochastic programming while the optimization process and the operational constraints were considered to calculate the operational costs in different ESSs. However congestion in the power systems is often occurred due to the extreme load increments. Hence this study proposes a bi-level formulation system where independent system operators (ISO) manage the congestion in the upper level while VESS operators deal with the financial goals in the lower level. Moreover four case studies have considered to observe the effectiveness of each storage system and the simulation was modeled in the IEEE 33-bus system with CPLEX in GAMS.

Introduction of hydrogen into the UK gas main has been reviewed in terms of how materials within the Keele G3 gas distribution network (G3 GDN) on the Keele University network may be affected by contact with natural gas (NG):hydrogen blends up to a limit of 20 % mol/mol hydrogen.<br/>This work has formed part of the supporting evidence for a 1 year hydrogen blending trial on the Keele G3 GDN coordinated by the HyDeploy consortium (formed of representatives of Cadent Northern Gas Networks ITM Power Progressive Energy HSL and Keele University).<br/>A wide range of materials were identified and assessed via a combination of literature review and practical test programmes. No significant changes to material properties in terms of accelerated material degradation or predicted efficiency of gas confinement were identified which would cause concern for the year-long trial at Keele.<br/>It can be concluded that materials on the Keele G3 GDN should be acceptable to provide a safe operating network the HyDeploy demonstrator project up to a level of 20 % mol/mol hydrogen.<br/>Check the supplements tab for the other documents in this report

Several alternative fuel–vehicle combinations are being considered for replacement of the internal combustion engine (ICE) vehicles to reduce greenhouse gas (GHG) emissions and the dependence on fossil fuels. The International Energy Agency has proposed the inclusion of low carbon alternatives such as electricity hydrogen and biofuels in the transport sector for reducing the GHG emissions and providing a sustainable future. This paper compares the use of these alternative fuels viz. electricity hydrogen and bio-ethanol in combination with battery electric vehicle (BEV) and fuel cell electric vehicle (FCEV) technologies on the basis of their overall efficiency and GHG emissions involved in the conversion of the primary energy source to the actual energy required at wheels through a well-to-wheel analysis. The source of energy for electricity production plays a major role in determining the overall efficiency and the GHG emissions of a BEV. Hence electricity production mix of Germany (60% fossil fuel energy) France (76% nuclear energy) Sweden and Austria (60 and 76% renewable energy respectively) the European Union mix (48% fossil fuel energy) and the United States of America (68% fossil fuel energy) are considered for the BEV analysis. In addition to the standard hydrogen based FCEVs CNG and bio-ethanol based FCEVs are analysed. The influence of a direct ethanol fuel cell (DEFC) on GHG emissions and overall chain efficiency is discussed. In addition to the standard sources of bio-ethanol (like sugarcane corn etc.) sources like wood waste and wheat straw are included in the analysis. The results of this study suggest that a BEV powered by an electricity production mix dominated by renewable energy and bio-ethanol based DEFC electric vehicles offer the best solution in terms of GHG emissions efficiency and fossil fuel dependency. Bio-ethanol as a fuel has the additional advantage to be implemented readily in ICE vehicles followed by advancements through reformer based FCEVs and DEFC electric vehicles. Although important this analysis does not include the health effects of the alternative vehicles. Bio-ethanol used in an ICE may lead to increased emission of acetaldehydes which however might not be the case if it is used in fuel cells.

Producing hydrogen by water electrolysis suffers from the kinetic barriers in the oxygen evolution reaction (OER) that limits the overall efficiency. With spin-dependent kinetics in OER to manipulate the spin ordering of ferromagnetic OER catalysts (e.g. by magnetization) can reduce the kinetic barrier. However most active OER catalysts are not ferromagnetic which makes the spin manipulation challenging. In this work we report a strategy with spin pinning effect to make the spins in paramagnetic oxyhydroxides more aligned for higher intrinsic OER activity. The spin pinning effect is established in oxideFM/oxyhydroxide interface which is realized by a controlled surface reconstruction of ferromagnetic oxides. Under spin pinning simple magnetization further increases the spin alignment and thus the OER activity which validates the spin effect in rate-limiting OER step. The spin polarization in OER highly relies on oxyl radicals (O∙) created by 1st dehydrogenation to reduce the barrier for subsequent O-O coupling.

Low-cost high-performance coatings for hydrogen production via electrolytic water-splitting are of great importance for de-carbonising energy. In this study the Raney2.0 coating was analysed using various electrochemical techniques to assess its absolute performance and it was confirmed to have an extremely low overpotential for hydrogen evolution of just 28 mV at 10 mA/cm². It was also confirmed to be an acceptable catalyst for oxygen evolution making it the highest performing simple bifunctional electrocatalyst known. The coating exhibits an extremely high capacitance of up to 1.7 F/cm² as well as being able to store 0.61 J/cm² in the form of temporary hydride deposits. A new technique is presented that performs a best-fit of a transient simulation of an equivalent circuit containing a constant phase element to cyclic voltammetry measurements. From this the roughness factor of the coating was calculated to be approximately 40000 which is the highest figure ever reported for this type of material. The coating is therefore an extremely useful improved bifunctional coating for the continued roll-out of alkaline electrolysis for large-scale renewable energy capture via hydrogen production.

Hydrogen has potential applications across our future energy systems due particularly to its relatively high energy weight ratio and because it is emission-free at the point of use. Hydrogen is also abundant and versatile in the sense that it could be produced from a variety of primary energy sources and chemical substances including water and used to deliver power in a variety of applications including fuel cell combined heat and power technologies. As a chemical feedstock hydrogen has been used for several decades and such expertise could be fed back into the relatively new areas of utilising hydrogen to meet growing energy demands.<br/>The UK interest in hydrogen is also growing with various industrial academic and governmental organisations investigating how hydrogen could be part of a diverse portfolio of options for a low carbon future. While hydrogen as an alternative fuel is yet to command mass-appeal in the UK energy market IGEM believes hydrogen is capable of allowing us to use the wide range of primary energy sources at our disposal in a much greener and sustainable way.<br/>IGEM also sees hydrogen playing a small but key role in the gas industry whereby excess renewable energy is used to generate hydrogen which is then injected into the gas grid for widespread distribution and consumption. Various studies suggest admixtures containing up to 10 – 50%v/v hydrogen could be safely administered into the existing natural gas infrastructure. However IGEM understands that this would currently not be permissible under the Gas Safety (Management) Regulations (GS(M)R) for gas conveyance here in the UK. Also proper assessments of the risks associated with adding hydrogen to natural gas streams will need to be performed so that such systems can be managed effectively.<br/>IGEM has also identified a need for standards that cover the safety requirements of hydrogen technologies particularly those pertaining to installations in commercial or domestic environments. IGEM also recommend that the technical measures used to determine separation distances for hydrogen installations particularly refuelling stations are re-assessed through a systematic identification and control of potential sources of ignition.<br/>Hydrogen has the potential to be a significant fuel of the future and part of a diverse portfolio of energy options capable of meeting growing energy needs. This report therefore seeks to demonstrate how hydrogen could be a potential option for energy storage and power generation in a diverse energy system. It also aims to inform the readers on the current state of hydrogen here in the UK and abroad. This report has been assembled for IGEM members interested bodies and the general public.

Increased penetration of renewable energy sources and decarbonisation of the UK's gas supply will require large-scale energy storage. Using hydrogen as an energy storage vector we estimate that 150 TWh of seasonal storage is required to replace seasonal variations in natural gas production. Large-scale storage is best suited to porous rock reservoirs. We present a method to quantify the hydrogen storage capacity of gas fields and saline aquifers using data previously used to assess CO2 storage potential. We calculate a P50 value of 6900 TWh of working gas capacity in gas fields and 2200 TWh in saline aquifers on the UK continental shelf assuming a cushion gas requirement of 50%. Sensitivity analysis reveals low temperature storage sites with sealing rocks that can withstand high pressures are ideal sites. Gas fields in the Southern North Sea could utilise existing infrastructure and large offshore wind developments to develop large-scale offshore hydrogen production.

Gi Editor Sharon Baker-Hallam sits down with Chris Stark CEO of the Committee on Climate Change to talk about this year’s Sir Denis Rooke Memorial Lecture the economic opportunities to be found in going green and why 2020 is a critical year in the ongoing battle against rising global temperatures