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Hydrogen-Powered Planes: Pie in the Sky?

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Vlad - little point in linking an article behind a paywall. Better to copy a couple of key paragraphs and paste them in your post. As for the point, most of the material I've seen about making air travel green has been about buying carbon offsets. Otherwise, finding a viable way to cut emissions fort air travel is hard. One way to reduce emissions in air travel would be to ban activists from attending international meetings on emission reductions, but I don't think that is going to happen.    

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On 3/16/2021 at 8:16 AM, Vlad Kovalenko said:

Liquid hydrogen has to be kept at -253C. The tanks to contain it are not only heavier but four times the size of conventional fuel storage. Even the keenest advocates admit hydrogen will initially be limited to smaller, shorter-range aircraft.

https://www.ft.com/content/7099d84c-07b8-4970-b826-ac28b4e59841

There's always the "Hindenburg" usage.  That's a LOT lighter.

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Perhaps hydrogen fuel for airplanes is possible.  I read that Novatek, now specializing in turning NG from Russian Arctic into LNG, wants to export hydrogen in the future.  The actual text says that it would be in the form of ammonia, which is like methane, except with nitrogen instead of a carbon.  That would suggest that it is easy to detach hydrogen atoms from a nitrogen atom and burn it.  Liquified ammonia is quite feasible to store, this is part of the premise of exporting hydrogen in this form.

Could ammonia be used to fuel "hydrogen airplanes"?

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