Applicability of chemical absorption process to carbon dioxide removal andrecovery under effluent gas conditions of LNG combined cycle power plant

Carbon dioxide removal was carried out on LNG combined cycle Power station flue gas up to about 3% CO2 concentration, using a pilot-scale absorber of about 23 m height at an exhaust gas now rate of 770 m(3)/h. Test results sh ow a chemical absorption process using KS-1 solution, which is a hindered t ype alkanolamine, exhibits good applicability to the present condition. The degree of CO2 removal is higher than 90% in the range or CO2 concentration of 3.4% to 10.3% by the selection of the proper steam consumption. The the rmal energy increases as the CO2 concentration decreases. In the case of KS -1 solution, the thermal energy is as low as 3.5x10(3) kJ/kg CO2, even at a CO2 concentration of 3.4%.