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Additionally, unless I'm missing something, we don't actually have the economics at scale to produce "green hydrogen" right now - it's definitely cleaner than o
by munk-a 5y ago
Additionally, unless I'm missing something, we don't actually have the economics at scale to produce "green hydrogen" right now - it's definitely cleaner than oil, but it's still rather environmentally expensive to produce.
- ZeroGravitas 5y agoIt's not evironmentally expensive, but it is currently money expensive due to a combination of implicit subsidies of the fossil fuel industry and small scale of production.
- nradov 5y agoAt the moment most hydrogen is produced by reforming natural gas. So in some ways it's less "green" than just burning the natural gas.
- ZeroGravitas 5y agoIt's a complicated area but the key difference is to only use it for things that can't be otherwise electrified, which are mostly chemical input tasks, but cargo shipping on (or under) water is probably one of the sensible uses. Here's an article with a handy chart: https://www.rechargenews.com/energy-transition/liebreich-oil-sector-is-lobbying-for-inefficient-hydrogen-cars-because-it-wants-to-delay-electrification-/2-1-1033226 https://www.rechargenews.com/energy-transition/liebreich-oil...
- c_o_n_v_e_x 5y agoUnless the sub has a snorkel to the surface or some ability to extract dissolved O2 from seawater, the sub will also need an onboard supply of O2.. presumably compressed O2.. or they use hydrogen peroxide like in torpedoes?
- nradov 5y agoYes fuel cell powered submarines always carry an onboard oxygen supply, either compressed gas or liquid. It's not practical to extract that much dissolved O2 from seawater.