article · Global Challenges
Hydrogen is gaining global recognition as a viable energy vector and alternative fuel source. While both renewable and conventional energy sources can be used for its generation, wind and solar power represent the most promising sustainable options. In particular, water electrolysis powered by wind energy or off-grid solar systems offers practical opportunities to supply hydrogen in remote, isolated locations away from existing infrastructure. Producing hydrogen from renewable resources derived from undeveloped streams or waste flows can enhance the flexibility and affordability of semi-centralised and distributed reforming systems, all while releasing fewer or no net greenhouse gases. However, widespread deployment faces technical barriers across all production methods. Key hurdles include improving conversion efficiency, handling varied feedstock types, and ensuring the safe integration of hydrogen production units with downstream storage and purification technologies.
Transitioning to clean fuel alternatives requires scalable methods to generate energy without harmful emissions. Hydrogen offers a flexible path towards decarbonisation, especially when generated using solar, wind, or waste resources. Identifying current production constraints helps researchers and industry focus on critical operational issues, such as efficiency and safe system integration, which are needed to deploy clean energy in both centralised and off-grid settings.
The findings point towards distributed hydrogen reforming units and off-grid water electrolysis systems, which could serve remote facilities or decentralised energy operators. However, the work represents an assessment of technological barriers rather than a tested commercial prototype. Widespread practical use remains hindered by early-stage engineering challenges, specifically regarding conversion efficiencies, feedstock variability, and the safe, unified integration of generation systems with dedicated purification and storage technologies.
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Hydrogen is promising as an innovative energy vector beyond its conventional role and receiving international identification as a feasible fuel source. This review provides a concise examination of current advances in hydrogen production techniques employing renewable and conventional energy sources, as well as important difficulties in hydrogen production. Wind and solar are the two most promising sustainable energy sources for hydrogen manufacturing. The hydrogen production from renewable sources generated from undeveloped or other waste flows increases the affordability and flexibility of semi-centralized and distributed reforming while emitting no net or fewer greenhouse gases. Water electrolysis apparatus powered by wind energy or off-grid solar can also used in distant places away from the framework. Every hydrogen-producing technology presents technological obstacles. These obstacles include conversion efficiency, feedstock type, and the requirement to safely integrate the production of hydrogen systems with storage and purification technology.
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DOI: 10.1002/gch2.202500086
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