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671

How is the hydrogen made? (slrpnk.net)

submitted 1 year ago by [email protected] to c/[email protected]

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cross-posted from: https://slrpnk.net/post/8569504

How is the hydrogen made?

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[–] [email protected] 257 points 1 year ago* (last edited 1 year ago) (56 children)

To save you all a google: it's made from natural gas, at a pretty significant energy loss compared to just burning the gas. It generates about 4 times more co2 than burning diesel.

[–] [email protected] 7 points 1 year ago (19 children)

Are those CO2 emissions? I don't get where the CO2 comes from.

I know this is an animation, but it shows pretty well, how hydrogen is made from natural gas. No CO2 emissions. And using the hydrogen should produce H2O.

https://www.youtube.com/watch?v=aHseMOXbefs

[–] [email protected] 10 points 1 year ago (2 children)

I think the issue is where the energy to heat the reaction vessel comes from. The video shows green sources, but that isn't the only way to do it. The thing is, this is ultimately an energy storage tech rather than an energy generation tech. You need excess capacity to make it work, and if that means you have to make up for a shortful with conventional generators elsewhere, you aren't actually saving anything.

I don't know if the previous poster is right of course, but the planet is an almost closed system, and there really is no such thing as a free lunch when it comes to energy.

[–] [email protected] 3 points 1 year ago (1 children)

The ultimate idea afaik is to build huge renewable energy power plants (for example solar energy in deserts) to generate it there, and then transport it through pipelines to wherever you need it.

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