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Journal Articles Nature Geoscience Year : 2022

Orange hydrogen is the new green


Maintaining global warming well below 2 °C, as stipulated in the Paris Agreement, will require a complete overhaul of the world energy system. Hydrogen is considered to be a key component of the decarbonization strategy for large parts of the transport system, as well as some heavy industries. Today, about 96% of current hydrogen production comes from the steam reforming of coal or natural gas (labelled black and grey hydrogen, respectively). If hydrogen is to become a solution, then black and grey hydrogen need to be replaced by a low-carbon option. One method that has received much attention is to produce so-called green hydrogen by coupling water electrolysis with renewable energies. However, green hydrogen is expensive and energy-intensive to produce. Here, we explore an alternative option and highlight the benefits of rock-based hydrogen (white and orange) compared with classic electrolysis-based technologies. We show that the exploitation of native hydrogen and its combination with carbon sequestration has the potential to fuel a large part of the energy transition without the substantial energy and raw material cost of green hydrogen.
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insu-03858117 , version 1 (18-11-2022)



Florian Osselin, Cyprien Soulaine, C. Fauguerolles, E. C. Gaucher, Bruno Scaillet, et al.. Orange hydrogen is the new green. Nature Geoscience, 2022, 15, pp.765-769. ⟨10.1038/s41561-022-01043-9⟩. ⟨insu-03858117⟩
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