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    $\begingroup$ The process on MOXIE will convert 2 CO2 to 2 CO + O2 if I'm not mistaken. It has a carbon monoxide vent. $\endgroup$
    – dotancohen
    Commented Aug 3, 2014 at 11:52
  • $\begingroup$ By the way, hematite is an iron oxide Fe2O3. There are many different iron oxides with the formula FexOy with different numbers for x and y: FeO, Fe2O3, Fe3O4, Fe4O5, Fe5O6, Fe5O7 and more. $\endgroup$
    – Uwe
    Commented Sep 30, 2019 at 14:48