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by giancarlostoro4 hours ago |
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upvoteby pjc504 hours ago|
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It's very easy to create hydrogen from fossil natural gas. Which is the real motivation behind 99% of H2 projects; continue to emit CO2, just hidden from the end user.

Battery electric is now pretty much inevitable.

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upvoteby pfdietz4 hours ago|
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In fairness, hydrogen from gas would enable the CO2 to be sequestered. If the vehicle itself burned the natural gas that would require recapturing the CO2 from the atmosphere itself, which is much more challenging.

None of this is to detract from the attractiveness of battery vehicles.

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upvoteby pjc502 hours ago|
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Carbon sequestration is another of those "if we did this, it might solve the problem, but there's no serious move to do it and pay for it on the scale required, plus it's prone to cheating".
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upvoteby 2muchcoffeeman3 hours ago|
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How do you solve aeronautical and maritime applications?
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upvoteby danhor3 hours ago|
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Certainly not with hydrogen directly. It might be involved in the production chain, but it's such a pain. If it's at all possible to electrify, that'll very likely win.

For flights, a combination of batteries for smaller, regional planes starting with "islands hoppers" now and SAF from either Biofuel or produced from Electricity (with Hydrogen as an intermediate step). Although I think that we might first see moves to reduce the 2x non CO2 Climate Impacts which can be much cheaper to tackle (such as Contrails).

For maritime applications, batteries when regularly near ports, probably hybrids with methanol for cross-ocean passage far away from coasts.

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upvoteby pjc502 hours ago|
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The Toyota Mirai neither flies nor floats.

There's a bit of a movement for battery electric ships, but currently limited to short haul ferries. I have a suspicion this simply won't be "solved" for quite some time after car and heating electrification.

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upvoteby fsh2 hours ago|
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Hydrogen is not great for airplanes since the extremely low density makes the tanks too large. The best solution would be synthetic hydrocarbons (synthesized using hydrogen) which can outperform fossil jet fuel.
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upvoteby Rohansi4 hours ago|
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Creating hydrogen isn't the only problem. Storage and transportation is a big one since it is an actual gas instead of a liquid. Needs to be compressed, causes embrittlement, highly flammable, etc...
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upvoteby mono4424 hours ago|
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It's possible to create hydrogen from coal and carbon capture is supposed to be feasible. Though I don't know how commercially viable this is.
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upvoteby peterfirefly3 hours ago|
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Carbon doesn't really contain all that much hydrogen.

Feasibility is key.

https://www.youtube.com/watch?v=1GSV2kVkO1w

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upvoteby pfdietz3 hours ago|
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> Carbon doesn't really contain all that much hydrogen.

The hydrogen also comes from water reacted (mildly endothermically) with carbon, and by further reaction of carbon monoxide with water.

C + H2O --> CO + H2

CO + H2O --> CO2 + H2

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