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Hydrogen is a storage technology. When I looked at it last, it was largely planned to be produced by electrolysis, so the greenness of that depends on the power
by outside1234 4y ago
Hydrogen is a storage technology. When I looked at it last, it was largely planned to be produced by electrolysis, so the greenness of that depends on the power source for that operation. So it could be green if powered by solar? Or brown, if powered by coal.
- dredmorbius 4y agoHydrogen can also be "reformed" from other fuels, most particularly natural gas, or through carbon capture and storage (CCS). There are trade terms that have emerged, including "black", "brown", "grey", "blue", and "green" hydrogen which ... aren't especially clear or consistent in my experience. WEF have a 'splainer, though I'm not sure the classifications are universally accepted: <https://www.weforum.org/agenda/2021/07/clean-energy-green-hydrogen/ https://www.weforum.org/agenda/2021/07/clean-energy-green-hy...> Apparently NG -> H2 is "grey" or "torquiose", and CCS is "blue". "Green" is hydrolysis from renewable electricity.