Germany
PyPSA-Earth Sector-coupled: A Global Open-source Multi-energy System Model Showcased for Hydrogen Applications in Countries of the Global South
Jan 2025
Publication
This study presents sector-coupled PyPSA-Earth: a novel global open-source energy system optimization model that incorporates major demand sectors and energy carriers in high spatial and temporal resolution to enable energy transition studies worldwide. The model includes a workflow that automatically downloads and processes the necessary demand supply and transmission data to co-optimize investment and operation of energy systems of cou Read More
Underground Hydrogen Storage in Sandstone Reservoirs: Effects of Geochemical Reactivity of Hydrogen on Reservoir Performance
Jan 2025
Publication
Underground hydrogen storage in porous rocks is a promising method to stabilize renewable energy fluctuations. However data on the geochemical reactivity of hydrogen with reservoir rocks and its potential effects on reservoir performance are limited. This study investigates the geochemical reactivity of hydrogen with Bunt sandstein reservoir sandstones from northern Germany collected at a depth of about 2.5 km. Experiments were performed at Read More
Green Hydrogen Potential Assessment in Ghana: Application of PEM Electrolysis Process and Geospatial-multi-criteria Approach
Sep 2023
Publication
With green hydrogen gaining traction as a viable sustainable energyoption the present study explores the potential of producing greenhydrogen from wind and solar energy in Ghana. The study combinedthe use of geospatial multi-criteria approach and PEM electrolysisprocess to estimate the geographical and technical potential of theselected two renewable resources. The study also included anassessment of potential areas for grid integration. Technolo Read More
Methane Pyrolysis for Zero-Emission Hydrogen Production: A Potential Bridge Technology from Fossil Fuels to a Renewable and Sustainable Hydrogen Economy
Aug 2021
Publication
Hydrogen plays a key role in many industrial applications and is currently seen as one of the most promising energy vectors. Many efforts are being made to produce hydrogen with zero CO 2 footprint via water electrolysis powered by renewable energies. Nevertheless the use of fossil fuels is essentialin the short term. The conventional coal gasification and steam methane reforming processes for hydrogen production are undesirable due to the huge CO2 e Read More
Decarbonization of Long-Haul Heavy-Duty Truck Transport: Technologies, Life Cycle Emissions, and Costs
Feb 2025
Publication
Decarbonizing long-haul heavy-duty transport in Europe focuses on batteryelectric trucks with high-power chargers or electric road systems and fuel-cell-electric vehicles with hydrogen refueling stations. We present a comparative life cycle assessment and total cost of ownership analysis of these technologies for 20% of Germany’s heavy-duty long-haul transport alongside internal combustion engine vehicles. The results show that fuel cell vehicles with o Read More
Analysis of the Sugarcane Biomass Use to Produce Green Hydrogen: Brazilian Case Study
Feb 2025
Publication
Conventional hydrogen production processes which often involve fossil raw materials emit significant amounts of carbon dioxide into the atmosphere. This study critically evaluates the feasibility of using sugarcane biomass as an energy source to produce green hydrogen. In the 2023/2024 harvest Brazil the world’s largest sugarcane producer processed approximately 713.2 million metric tons of sugarcane. This yielded 45.68 million metric tons of sug Read More
Experimental Investigation of Hydrogen-Air Flame Propagation in Fire Extinguishing Foam
Sep 2024
Publication
An important element of modern firefighting is sometimes the use of foam. After the use of extinguishing foam on vehicles or machinery operated by compressed gases it is conceivable that masses of foam were enriched by escaping fuel gas. Furthermore new foam creation enriched with a high level of fuel gas from the deposed foam solution becomes theoretically possible. The aim of this study was to carry out basic experimental investigations Read More
Optimal Configuration of Hydrogen- and Battery-based Electric Bus Transit Systems
Feb 2025
Publication
Electric bus transit is crucial in reducing greenhouse gas (GHG) emissions decreasing fossil fuel reliance and combating climate change. However the transition to electric-powered buses demands a comprehensive plan for optimal resource allocation technology choice infrastructure deployment and component sizing. This study develops system configuration optimization models for battery electric buses (BEBs) and hydrogen fuel cell buses (H Read More
The German Scramble for Green Hydrogen in Namibia: Colonial Legacies Revisited?
Feb 2025
Publication
Namibia is positioning itself as a green hydrogen superpower to supply the German market with the muchneeded energy carrier. While the hydrogen hype is marketed as a pathway facilitating the German and Euro pean green transition that is mutually beneficial for African interests social movements and affected commu nities have been denouncing green colonialist tendencies of the hydrogen rush. This paper is centring these claims. Applying a heuristic of Read More
Integration of a Model-based System Engineering Framework with Safety Assessment for Early Design Phases: A Case Study for Hydrogen-based Aircraft Fuel System Architecting
Feb 2025
Publication
Novel hydrogen-based aircraft concepts pose significant challenges for the system development process. This paper proposes a generic adaptable and multidisciplinary framework for integrated model-based systems engineering (MBSE) and model-based safety assessment (MBSA) for the conceptual design of complex systems. The framework employs a multi-granularity modelcentric approach whereby the architectural specification is utilized for desi Read More
Techno-economic Analysis of Green Hydrogen Supply for a Hydrogen Refueling Station in Germany
Feb 2025
Publication
Green hydrogen is a cornerstone in the global quest for a carbon-neutral future offering transformative potential for decarbonizing transportation. This study investigates its role by assessing the feasibility of a large-scale hydrogen refueling station in Germany focusing on integrating renewable energy sources. A hydrogen demand model with a 10-min time resolution to refuel 30 trucks and 20 vans (1019 kg/day) is combined with a techno-economic optimiz Read More
Does the Public Want Green Hydrogen in Industry? Local and National Acceptance of Methanol and Steel Transitions in Germany
Feb 2025
Publication
Public perceptions might determine the ease of the transition from a fossil-based to a green hydrogen-based production pathway in the industrial sector. The primary objective of this paper is to empirically identify the antecedents of the acceptance of two relevant industrial applications of green hydrogen: green methanol and green steel. The analysis relying on linear regression models utilises survey data from samples of residents near a chemical park an Read More
Challenges and Potentials for Additive Manufacturing of Hydrogen Energy Components: A Review
Mar 2025
Publication
Climate change necessitates the development of sustainable energy systems with hydrogen technologies playing a key role in this transition. Additive manufacturing (AM) offers a significant potential to enhance the efficiency of hydrogen energy components and reduce their costs through rapid prototyping design freedom and functional integration. This review provides the first comprehensive summary of the current state of research on the applicati Read More
Participatory Mapping of Local Green Hydrogen Cost-potentials in Sub-Saharan Africa
Mar 2025
Publication
C. Winkler,
Heidi Heinrichs,
S. Ishmam,
B. Bayat,
Amin Lahnaoui,
Solomon Nwabueze Agbo,
E.U. Pena Sanchez,
David Franzmann,
N. Oijeabou,
C. Koerner,
Y. Michael,
B. Oloruntoba,
C. Montzka,
H. Vereecken,
H. Hendricks Franssen,
J. Brendt,
S. Brauner,
Wilhelm Kuckshinrichs,
S. Venghaus,
Daouda Kone,
Bruno Korgo,
Kehinde Olufunso Ogunjobi,
Jane Olwoch,
V. Chiteculo,
Z. Getenga,
Jochen Linßen and
Detlef Stolten
Green hydrogen is a promising solution within carbon free energy systems with Sub-Saharan Africa being a possibly well-suited candidate for its production. However green hydrogen production in Sub-Saharan Africa is not yet investigated in detail. This work determines the cost-potential for green hydrogen production within this region. Therefore a potential analysis for PV wind and hydropower groundwater analysis and energy systems optimization a Read More
Governance of Future-making: Green Hydrogen in Namibia and South Africa
Feb 2025
Publication
The green-hydrogen sector has created considerable expectations in the Global South about export-oriented development and industrial path creation. However whether and how these expectations are really materializing requires further scrutiny. This article develops a conceptual approach that we call governance of futuremaking. Thereby we want to understand how actors try to coordinate their expectations about future economic development Read More
Conceptual Design of a Metal Hydride System for the Recovery of Gaseous Hydrogen Boil-Off Losses from Liquid Hydrogen Tanks
Mar 2025
Publication
Liquid hydrogen (LH2) is a promising energy carrier to decrease the climate impact of aviation. However the inevitable formation of hydrogen boil-off gas (BOG) is a main drawback of LH2. As the venting of BOG reduces the overall efficiency and implies a safety risk at the airport means for capturing and re-using should be implemented. Metal hydrides (MHs) offer promising approaches for BOG recovery as they can directly absorb the BOG at ambient Read More
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