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A comment on NASA can now reliably produce a tree’s worth of oxygen on Mars. Parent comment

Re:NASA can now reliably produce a tree’s worth of oxygen on... by im3w1l on Tuesday September 06, 2022 @11:47AM (#32738748)
He means that you use carbon monoxide and iron-compound-rich mars dust to get elemental iron and carbon dioxide.
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Re:NASA can now reliably produce a tree’s worth of oxygen on... by PaulHoule on Tuesday September 06, 2022 @11:55AM (#32738868)
This is how a blast furnace works

https://en.wikipedia.org/wiki/Blast_furnace

since it partially burns coke to make CO which reduces FeO to Fe producing CO2. An alternate approach is to reduce FeO with hydrogen producing H2O. Either way this is likely to be a circular process in a space economy since volatiles like H2O and CO2 are precious.

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