How to Produce Green Hydrogen for $1/kg

Comments

• MrMakabar@slrpnk.net ⁨10⁩ ⁨months⁩ ago

  The problem is electrolysers are expensive right now. We do have cheap enough electricity, in great location solar, which is pretty common.

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• Cl1nk@sh.itjust.works ⁨10⁩ ⁨months⁩ ago

  Looks like a really good article, will come back to comment after reading it

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• silence7@slrpnk.net ⁨10⁩ ⁨months⁩ ago

  The tradeoff they’re talking about, where lower capital expenditures allow them to run a less efficient electrolyzer when the sun shines or the wind blows is something I expect to see a lot more of in industrial process design.

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  • schroedingershat@lemmy.world ⁨10⁩ ⁨months⁩ ago

    They’re assuming a monopoly on load-shifting the cheap power.

    Any process with fixed costs lower than the electrolyser will just expand that stage of the supply chain and buffer the inputs and outputs.

    Industrial heat is trivially stored at much higher density per volume in bricks, sand, or graphite.

    Low grade heat is way easier to store in a pond.

    Any variance with more than 100 cycles/yr is better served by batteries.

    So you’re left with electrolysers running at 1-5% capacity factor if you want the “unwanted” electricity. Otherwise you’re paying the same as anyone else not drawing from a battery.

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• oldGregg@lemm.ee ⁨10⁩ ⁨months⁩ ago

  Water powered car goes brrrrrrr

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  • greengnu@slrpnk.net ⁨10⁩ ⁨months⁩ ago

    Actually you would never want hydrogen powered cars from an engineering perspective.

    Ideally this would only be producing hydrogen for chemical processes which require a hydrogen feed stock.

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    • JoBo@feddit.uk ⁨10⁩ ⁨months⁩ ago

      Green hydrogen has a lot of advantages for cars compared to batteries: quick refuelling, much less weight, better range. Compared to CO2 emitting fuels (including non-green hydrogen), no contest.

      It’s especially good for heavy vehicles. It’s the only way we can currently use non-carbon fuels for air travel. It’s much more feasible for trucking than batteries.

      Green hydrogen is more like a kind of battery than a fuel. It’s a good way to store renewable energy that cannot be used immediately, or that needs to be used off-grid. How hydrogen is transforming these tiny Scottish islands

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    • oldGregg@lemm.ee ⁨10⁩ ⁨months⁩ ago

      You wouldn’t want the water to hydrogen plant inside the car but a hydrogen powered car would operate fine

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