From: niklas.holsti@tidorum.invalid   
      
   On 2021-04-24 9:23, JF Mezei wrote:   
   > In the news this week was that Perseverance on mars generated some   
   > "breathable" Oxygen (I guess there are brands of O2 that are not   
   > breathable :-)   
      
      
   Ozone is a form of oxygen that is not recommended for breathing.   
      
      
   > The article I read mentioned that there is Carbon Monoxyde as by   
   > product. (not quite breathable(.   
   >   
   > Out of curiosity, what sort of combination of CO2 yields CO and O2 ?   
      
      
   You take one molecule of CO2, and use electrolysis to rip off one atom   
   of O, leaving one molecule of CO. Do it twice and you get one O2 and two CO.   
      
   MOXIE uses a solid-oxide electrolysis process. This is not the Sabatier   
   process that SpaceX plans to use for producing methane and oxygen from   
   Martian CO2 and Martian water.   
      
      
   >  From a "make Mars liveable" point of view, shouldn't any conversion of   
   > CO2 avoid creating CO which isn't good for one's health?   
      
      
   If the CO is vented into the Martian atmosphere, no-one will try to   
   breathe it for a *long* time to come. But of course any plan for   
   terraforming Mars would have to avoid putting *large* amounts of CO into   
   the atmosphere.   
      
      
   > Or in this case since CO2 is result of combustion which released energy,   
   > one would need to put the energy back in to "unburn" the Carbon?   
      
      
   That is where the electricity for the electrolysis goes.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)