United States

In response to the global challenge of climate change 136 countries accounting for 90% of global GDP and 85% of the population have now set net-zero targets. A transition to net-zero will require the decarbonization of all sectors of the economy. Green-hydrogen produced from renewable energy sources poses little to no threat to the environment and increasing its production will support net-zero targets Our study examined the evolution of green-hydrogen research themes since the UN Sustainable Development Goals were adopted in 2015 by utilizing bibliographic couplings keyword co-occurrence and keyphrase analysis of 642 articles from 2016 to 2021 in the Scopus database. We studied bibliometrics indicators and temporal evolution of publications and citations patterns of open access the effect of author collaboration influential publications and top contributing countries. We also consider new indicators like publication views keyphrases topics with prominence and field weighted citation impact and Altmetrics to understand the research direction further. We find four major thematic distributions of green-hydrogen research based on keyword co-occurrence networks: hydrogen storage hydrogen production electrolysis and the hydrogen economy. We also find networks of four research clusters that provide new information on the journal’s contributions to green-hydrogen research. These are materials chemistry hydrogen energy and cleaner production applied energy and fuel cells. Most green-hydrogen research aligns with Affordable and Clean Energy (SDG 7) and Climate Action (SDG 13). The outcomes of policy decisions in the United States Europe India and China will profoundly impact green-hydrogen production and storage over the next five years. If these policies are implemented these countries will account for two-thirds of this growth. Asia will account for the most significant part and become the second-largest producer globally.

Hydrogen fuel cells have the potential to play a significant role in the decarbonization of the transportation sector globally and especially in California given the strong regulatory and policy focus. Nevertheless numerous questions arise regarding the environmental impact of the hydrogen supply chain. Hydrogen is usually delivered on trucks in gaseous form but can also be transported via pipelines as gas or via trucks in liquid form. This study is a comparative attributional life cycle analysis of three hydrogen production methods alongside truck and pipeline transportation in gaseous form. Impacts assessed include global warming potential (GWP) nitrogen oxide volatile organic compounds and particulate matter 2.5 (PM2.5). In terms of GWP the truck transportation pathway is more energy and ecologically intensive than pipeline transportation despite gaseous truck transport being more economical. A sensitivity analysis of pipeline transportation and life cycle inventories (LCI) attribution is included. Results are compared across multiple scenarios of the production and transportation pathways to discover the strongest candidates for minimizing the environmental footprint of hydrogen production and transportation. The results indicate the less ecologically intensive pathway is solar electrolysis through pipelines. For 1 percent pipeline attribution the total CO2eq produced per consuming 1 MJ of hydrogen in a fuel cell pickup truck along this pathway is 50.29 g.

Hydrogen could be used in many hard-to-decarbonize sectors. Foremost amongst them is the steel manufacturing industry. On this episode of EAH we speak with Dr. Martin Pei Executive Vice President and CTO of SSAB and the first Chairman of the Board for Hybrit Development AB. SSAB is a global steel company with a leading position in high-strength steels and related services. Together with their partners LKAB and Vattenfall SSAB are making a unique joint effort to change the Swedish iron and steel industry fundamentally. With HYBRIT technology SSAB aims to be the first steel company in the world to bring fossil-free steel to the market already in 2026 and largely eliminate carbon dioxide emissions from the company's own operations as soon as 2030.

The podcast can be found on their website.

Expanding decarbonization efforts beyond the power sector are contingent on cost-effective production of energy carriers like H2 with near-zero life-cycle carbon emissions. Here we assess the levelized cost of continuous H2 supply (95% availability) at industrial-scale quantities (100 tonnes/day) in 2030 from integrating commodity technologies for solar photovoltaics electrolysis and energy storage. Our approach relies on modeling the least-cost plant design and operation that optimize component sizes while adhering to hourly solar availability production requirements and component inter-temporal operating constraints. We apply the model to study H2 production costs spanning the continental United States and through extensive sensitivity analysis explore system configurations that can achieve $2.5/kg levelized costs or less for a range of plausible 2030 technology projections at high-irradiance locations. Notably we identify potential sites and system configurations where PV-electrolytic H2 could substitute natural gas-derived H2 at avoided CO2 costs (%$120/ton) similar to the cost of deploying carbon capture and sequestration.

Fission Batteries (FBs) are nuclear reactors for customers with heat demands less than 250 MWt—replacing oil and natural gas in a low-carbon economy. Individual FBs would have outputs between 5 and 30 MWt. The small FB size has two major benefits: (1) the possibility of mass production and (2) ease of transport and leasing with return of used FBs to factory for refurbishing and reuse. Comparatively these two features are lacking in larger conventional reactors. Larger reactors are not transportable and thus can’t obtain the manufacturing economics possible with mass production or the operational advantages of returning the FB to the factory after use. Leasing places the regulatory maintenance and fuel-cycle burden on the leasing company that is minimized by large-fleet operations of identical units. The markets and economic requirements for FBs were examined. The primary existing markets are industrial biofuels off-grid electricity and container ships. Two major future markets were identified—advanced biofuels and hydrogen. In a low-carbon world the competitive price range for heat is $20–50/MWh ($6–15/million BTU) and $70–115/MWh for non-grid electricity. The primary competition in these sectors is likely to be biofuels and hydrogen produced using alternative energy sources—grid electricity is non-competitive. Larger users of energy have alternative low-carbon energy choices including modular nuclear reactors and fossil fuels with carbon capture and sequestration (CCS).

Consumption of fossil fuels especially in transport and energy-dependent sectors has led to large greenhouse gas production. Hydrogen is an exciting energy source that can serve our energy purposes and decrease toxic waste production. Decomposition of methane yields hydrogen devoid of COx components thereby aiding as an eco-friendly approach towards large-scale hydrogen production. This review article is focused on hydrogen production through thermocatalytic methane decomposition (TMD) for hydrogen production. The thermodynamics of this approach has been highlighted. Various methods of hydrogen production from fossil fuels and renewable resources were discussed. Methods including steam methane reforming partial oxidation of methane auto thermal reforming direct biomass gasification thermal water splitting methane pyrolysis aqueous reforming and coal gasification have been reported in this article. A detailed overview of the different types of catalysts available the reasons behind their deactivation and their possible regeneration methods were discussed. Finally we presented the challenges and future perspectives for hydrogen production via TMD. This review concluded that among all catalysts nickel ruthenium and platinum-based catalysts show the highest activity and catalytic efficiency and gave carbon-free hydrogen products during the TMD process. However their rapid deactivation at high temperatures still needs the attention of the scientific community.

Growth in the hydrogen and fuel cell industries will lead to vast new employment opportunities and these will be created in a wide variety of industries skills tasks and earnings. Many of these jobs do not currently exist and do not have occupational titles defined in official classifications. In addition many of these jobs require different skills and education than current jobs and training requirements must be assessed so that this rapidly growing part of the economy has a sufficient supply of trained and qualified workers. We discuss the current hydrogen economy and technologies. We then identify by occupational titles the new jobs that will be created in the expanding hydrogen/fuel cell economy estimate the average US salary for each job identify the minimum educational attainment required to gain entry into that occupation and specify the recommended university degree for the advanced educational requirements. We provide recommendations for further research.

This paper presents a new model of fuel cells for two different modes of operation: constant fuel utilization control (constant stoichiometry condition) and constant fuel flow control (constant flow rate condition). The model solves the long-standing problem of mixing reversible and irreversible potentials (equilibrium and non-equilibrium states) in the Nernst voltage expression. Specifically a Nernstian gain term is introduced for the constant fuel utilization condition and it is shown that the Nernstian gain is an irreversibility in the computation of the output voltage of the fuel cell. A Nernstian loss term accounts for an irreversibility for the constant fuel flow operation. Simulation results are presented. The model has been validated against experimental data from the literature.

The fuel cell game is not new and for many it is has been a long time coming. Few know this better than Ballard Power Systems the third ever founded Fuel Cell company that has operated since the 1970s. On the show we ask Nicolas Pocard about Ballards history and why this time the market is different for fuel cell companies.

The podcast can be found on their website

Due to its much lower air pollution and potential greenhouse gas (GHG) emissions benefits liquefied natural gas (LNG) is frequently discussed as a fuel pathway towards greener maritime transport. While LNG’s air quality improvements are undeniable there is debate within the sector as to what extent LNG may be able to contribute to decarbonizing shipping. This report “The Role of LNG in the Transition Toward Low- and Zero-Carbon Shipping” considers the potential of LNG to play either a transitional role in which existing LNG infrastructure and vessels could continue to be used with compatible zero-carbon bunker fuels after 2030 or a temporary one in which LNG would be rapidly supplanted by zero-carbon alternatives from 2030. Over concerns about methane leakage which could diminish or even offset any GHG benefits associated with LNG and additional capital expenditures the risk of stranded assets as well as a technology lock-in the report concludes that LNG is unlikely to play a significant role in decarbonizing maritime transport. Instead the research finds that LNG is likely to only be used in niche shipping applications or in its non-liquefied form as a feedstock to kickstart the production of zero-carbon bunker fuels when used in conjunction with carbon capture and storage technology. The research further suggests that new public policy in support of LNG as a bunker fuel should be avoided existing policy support should be reconsidered and methane emissions should be regulated.