Comments on: Green Ethanol and Green Hyrdogen https://gregladen.com/blog/2023/10/13/green-ethanol-and-green-hyrdogen/ Fri, 20 Oct 2023 22:26:46 +0000 hourly 1 https://wordpress.org/?v=6.4.8 By: wereatheist https://gregladen.com/blog/2023/10/13/green-ethanol-and-green-hyrdogen/#comment-1004035 Fri, 20 Oct 2023 22:26:46 +0000 https://gregladen.com/blog/?p=35336#comment-1004035 In reply to Christopher Winter.

You cannot ‘replace’ coke in steel production by hydrogen, because the carbon from coke is what makes steel from iron.
Of course one possibly can reduce the amount of coke needed.

]]> By: Greg Laden https://gregladen.com/blog/2023/10/13/green-ethanol-and-green-hyrdogen/#comment-1004015 Fri, 20 Oct 2023 17:49:30 +0000 https://gregladen.com/blog/?p=35336#comment-1004015 In reply to wereatheist.

They are close to the efficiency of combustion engines, nothing close to electric motors.

]]> By: Christopher Winter https://gregladen.com/blog/2023/10/13/green-ethanol-and-green-hyrdogen/#comment-1003909 Wed, 18 Oct 2023 04:21:26 +0000 https://gregladen.com/blog/?p=35336#comment-1003909 Another use for hydrogen is to replace coke in steelmaking. A Swedish company has a small-scale prototype working. Commercial use will of course require large quantities of hydrogen. Replacing coke with hydrogen will have little benefit if the hydrogen is not green.

Dr. Sabine Hossenfelder has an excellent overview of hydrogen on her YouTube channel.

https://www.youtube.com/watch?v=Zklo4Z1SqkE

Sorry about the ads. They appeared about a week ago.

]]> By: wereatheist https://gregladen.com/blog/2023/10/13/green-ethanol-and-green-hyrdogen/#comment-1003761 Fri, 13 Oct 2023 23:32:22 +0000 https://gregladen.com/blog/?p=35336#comment-1003761 Fuel cells are at least as efficient as large, high weight-to-power-ratio (ship)diesel engines.
And brazilian not-so-green sugar cane ethanol is still somewhat better than just running trucks with the diesel fuel used by the agrarian equipment to produce said ethanol.

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