Process for recycling carbon dioxide emissions from power plants into carbonated species
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 at least a portion of said exhaust gas to produce a cooled 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;
contacting an aqueous liquid phase with the cooled exhaust gas to cause at least a portion of the CO2 to dissolve into the aqueous liquid phase and catalyzing the hydration of at least a portion of the dissolved CO2 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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Abstract
A process is disclosed for recycling carbon dioxide emissions from a fossil-fuel power plant into useful carbonated species The process primarily comprises the steps of: a) burning the fossil fuel, thereby generating heat and a hot exhaust gas containing CO2; and b) converting the heat into energy. The process is characterized in that it further comprises the steps of: c) cooling the exhaust gas; and d) biologically transforming the CO2 contained in the cooled exhaust gas into carbonated species, thereby obtaining a low CO2 exhaust gas and producing useful carbonated species. The low CO2 exhaust gas obtained in step d) can be released in the atmosphere without increasing the problem of greenhouse effect.
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Citations
26 Claims
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1. A process comprising:
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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 at least a portion of said exhaust gas to produce a cooled 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;contacting an aqueous liquid phase with the cooled exhaust gas to cause at least a portion of the CO2 to dissolve into the aqueous liquid phase and catalyzing the hydration of at least a portion of the dissolved CO2 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.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification