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Orange hydrogen is the new green

Florian Osselin 1, 2, * Cyprien Soulaine 1, 2 C. Fauguerolles 1 E. C. Gaucher 3 Bruno Scaillet 1, 4 Michel Pichavant 1, 4 
* Corresponding author
2 Milieux Poreux - UMR7327
ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327 : UMR7327
4 Magma - UMR7327
ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327
Abstract : 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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Submitted on : Friday, November 18, 2022 - 3:56:25 PM
Last modification on : Saturday, November 19, 2022 - 3:58:38 AM

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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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