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Process and a plant for recycling carbon dioxide emissions from power plants into useful carbonated species

  • US 20100021981A1
  • Filed: 09/28/2009
  • Published: 01/28/2010
  • Est. Priority Date: 09/27/2002
  • Status: Active Grant
First Claim
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1. A process comprising:

  • a) combustion of a fossil fuel, thereby generating heat and a hot exhaust gas containing CO2;

    b) converting said heat into energy;

    the process being characterized in that it comprises the steps of;

    c) cooling said exhaust gas; and

    d) reducing the amount of CO2 contained in the cooled exhaust gas by biologically transforming said CO2 into carbonated species;

    thereby obtaining a low CO2 exhaust gas, wherein step d) comprises the steps of;

    catalyzing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing hydrogen ions and carbonate ions; and

    wherein said hydration is catalyzed by the enzyme carbonic anhydrase or an analogue thereof.

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