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A comment on Sweden delivered the world’s first fossil fuel-free steel. Parent comment

Re:Sweden delivered the world’s first fossil fuel-free steel by missedthecue on Saturday September 04, 2021 @02:02PM (#28417475)
Prior to the invention of the Bessemer Process, it was mostly made with charcoal, so yes. Of course it was also very expensive and made in small batches.
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Re:Sweden delivered the world’s first fossil fuel-free steel by aurizon on Saturday September 04, 2021 @02:26PM (#28417721)
there are new exploited deposits of hydrogen, formed at great depths under high pressure and temperatures. https://hydroma.ca/en/ is one I do not know if there are more and their production volume?
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Re:Sweden delivered the world’s first fossil fuel-free steel by extropy on Saturday September 04, 2021 @06:23PM (#28419913)
It's still a fossil fuel though. Not emitting climate affecting gasses one but still.

Turns out releasing hydrogen in the atmosphere has some greenhouse effects: http://www.ghgonline.org/otherhydrogen.htm

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Re:Sweden delivered the world’s first fossil fuel-free steel by aurizon on Saturday September 04, 2021 @07:22PM (#28420302)
No, It is a reaction between buried iron oxide and water. This is very high temperature high pressure reaction. The iron oxide changes oxidation state, releasing hydrogen. Here is one, there are others, like the one I cited. https://www.preprints.org/manuscript/202010.0589/v1/download
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