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Sequester CO2 in flooded alkali salt flats

 Seawater, salt, alkali, sequester... done
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Salt flats, such as Bonneville, may be alkali. This is caused by Na/KOH. In aqueous solution CO2 dissolves (especially when bubbled in concentrated form from a nearby power station or some such). In alkali solution it is converted to NaHCO3 or Na2OH3. Which can be used for all manner of things. Also the salt flats are BIG, which is what you have to think for CO2 sequestration
—bs0u0155, Feb 15 2010

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       Big is good. Will the reactions proposed be endo- or exothermic?   

       //salt falts // sp: flats
—csea, Feb 16 2010
   

       If this were true then simply adding the water would begin binding the CO2 out of the air. . Sadly it isn't.
—WcW, Feb 16 2010
   

       The dissolving of NaOH in water is exothermic, very. However the dissolving of NaCl or KCl is endothermic. So, depending upon the region and the relative concentrations of each salt, this would change. However assuming a region of very high NaOH, you could flood them at night and heat would be given off and radiate away.... because it's night. In the day, because you used precisely the right amount of water, it would evaporate away, which would cool the whole area down. You then have a clever way of getting heat energy back into space on the night side of Earth. Neat.
—bs0u0155, Feb 17 2010
   


 

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