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Climate benefit of a future hydrogen economy

Environmental Studies and Forestry

Climate benefit of a future hydrogen economy

D. Hauglustaine, F. Paulot, et al.

Investigating the climate impact of a future hydrogen economy, this research by Didier Hauglustaine, Fabien Paulot, William Collins, Richard Derwent, Maria Sand, and Olivier Boucher reveals the climate benefits of green hydrogen while highlighting potential penalties from blue hydrogen. Discover how hydrogen production pathways and leakage rates play a critical role in mitigating CO2 emissions!

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~3 min • Beginner • English
Abstract
Hydrogen is recognised as an important future energy vector for applications in many sectors. Hydrogen is an indirect climate gas which induces perturbations of methane, ozone, and stratospheric water vapour, three potent greenhouse gases. Using data from a state-of-the-art global numerical model, here we calculate the hydrogen climate metrics as a function of the considered time-horizon and derive a 100-year Global Warming Potential of 12.8 ± 5.2 and a 20-year Global Warming Potential of 40.1 ± 24.1. The considered scenarios for a future hydrogen transition show that a green hydrogen economy is beneficial in terms of mitigated carbon dioxide emissions for all policy-relevant time-horizons and leakage rates. In contrast, the carbon dioxide and methane emissions associated with blue hydrogen reduce the benefit of a hydrogen economy and lead to a climate penalty at high leakage rate or blue hydrogen share. The leakage rate and the hydrogen production pathways are key levers to reach a clear climate benefit from a large-scale transition to a hydrogen economy.
Publisher
Communications Earth & Environment
Published On
Oct 26, 2022
Authors
Didier Hauglustaine, Fabien Paulot, William Collins, Richard Derwent, Maria Sand, Olivier Boucher
Tags
climate impact
hydrogen economy
green hydrogen
blue hydrogen
CO2 emissions
methane emissions
leakage rates
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