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A comment on Direct conversion of CO2 to solid carbon by Gallium-based liquid metals. Parent comment

Re:Direct conversion of CO2 to solid carbon by Gallium-based... by analog31 on Tuesday January 18, 2022 @10:28PM (#29989596)
How is it smelted from ore in the first place? Quick look suggests that it starts out as an oxide, and is a byproduct of aluminum production.
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