Hydrogen for Decarbonization: A Realistic Assessment

The paper argues that low-carbon hydrogen should be reserved for 'no-regrets' industrial applications—such as refining, ammonia, methanol, and steel production—rather than residential heating or light-duty vehicles, due to high energy costs and physical transport challenges.

• Current global hydrogen production is overwhelmingly carbon-intensive, with approximately 59 million metric tons (MT) produced annually from natural gas via steam methane reforming and 20 MT from coal gasification.
• Low-carbon hydrogen is currently in short supply; in 2022, water electrolysis accounted for only 0.1% of global production due to poor economics and an undeveloped supply chain.
• The physical properties of hydrogen, specifically its low volumetric density and extremely low boiling point (-253°C), make maritime transport costly and inefficient.
• Replacing unabated hydrogen in crude oil refining is identified as a 'low-hanging' decarbonization opportunity that could reduce CO2 emissions by 240–380 MT/y.
• Decarbonizing hydrogen for ammonia and methanol production is prioritized due to their critical roles in global food security (fertilizers) and industrial chemicals.
• Hydrogen fuel cell electric vehicles (FCEVs) are viewed as a viable complement to battery electric vehicles (BEVs) for heavy-duty long-haul trucking, though they require approximately 2.5 times more electricity to travel the same distance.
• Using electrolytic hydrogen for power generation is inefficient due to a round-trip efficiency (RTE) of only 24%, meaning 76% of the input electricity is lost.
• Hydrogen is deemed unsuitable for residential heating and light-duty vehicles because alternatives like heat pumps and BEVs are more efficient, more economic, and safer.

APA

Wakim, G. (2023). Hydrogen for Decarbonization: A Realistic Assessment. Clean Air Task Force. https://www.catf.us/resource/hydrogen-decarbonization-realistic-assessment/

Chicago

Wakim, Ghassan. Hydrogen for Decarbonization: A Realistic Assessment. Clean Air Task Force, 2023. https://www.catf.us/resource/hydrogen-decarbonization-realistic-assessment/.

Wikipedia

{{cite report |last1=Wakim |first1=Ghassan |title=Hydrogen for Decarbonization: A Realistic Assessment |publisher=Clean Air Task Force |date=21 November 2023 |url=https://www.catf.us/resource/hydrogen-decarbonization-realistic-assessment/ |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{wakim2023hydrogen, author = {Wakim, Ghassan}, title = {{Hydrogen for Decarbonization: A Realistic Assessment}}, institution = {Clean Air Task Force}, year = {2023}, month = nov, url = {https://www.catf.us/resource/hydrogen-decarbonization-realistic-assessment/}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }