Method of and apparatus for utilizing and recovering carbondioxide in combustion exhaust gas.

摘要

A method of recovering carbon dioxide gas from the combustion exhaust gas of fossil fuel, using a combustion equipment(II), characterized in that fuel gas (AG) is supplied to an anode chamber (3) of a molten carbonate fuel cell (FC) and oxidizing gas is supplied to a cathode chamber (2) of the fuel cell (FC), the combustion exhaust gas (G) from the combustion equipment (II) is suuplied to the cathode chamber (2) as part of the oxidizaing gas, CO2 in the combustion exhaust gas (G) is allowed to react with O2 in the oxidizing gas at the cathode (C) to produce carbonate ion, which is allowed to pass through an electrolyte (1) of the fuel cell (FC) and to reach the anode (A) , which the carbonate ion is allowed to react with hydrogen in the fuel gas (AG) to produce CO2 and H2O, the anode exhaust gas (8) containing CO2 and H2O generated at the anode (A) is discharged from the anode chamber (3) , H2O is separated from the anode exhaust gas (8) and high-concentration CO2 gas is recovered.