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View Diary: Sea Urchin offers path to Cheap Carbon Sequestration (118 comments)

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  •  The problem from another angle (2+ / 0-)
    Recommended by:
    LakeSuperior, Deward Hastings

    Whatever the source of ionic calcium, the overall reaction to form calcium carbonate is:
        Ca2+  +  CO2  +  H2O  -->  CaCO3  + 2 H+
    which means there are 2 equivalents of acid to be disposed of somehow for every CO2 trapped. Where does that acid go? Into the ocean or rivers, like most of our wastes? Bad idea. So, as I said, I don't see how the "carbonic anhydrase" process, however achieved, gets us anywhere.
    The one large scale process for sequestering CO2 that doesn't have the proton problem is the following:
        6CO2  +  6H2O  -- (light) --> C6H12O6
    aka photosynthesis. As some commenters in the thread below point out, that's the way we should be going.  

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