CO2 capture was carried out over dry K2CO3/MgO/Al2O3 sorbent in a fluidized-bed reactor. The result showed that the total CO2 adsorption capacity of the new sorbent reached 109.6 mg of CO2/g of sorbent in the bubbling regime at 60 degrees C. The X-ray diffraction (XRD) results revealed that there were several kinds of carbonates formed during CO2 adsorption, such as KHCO3, KAl(CO3)(2)(OH)(2), K2Mg(CO3) K2Mg(CO3)(2)center dot 4H(2)O, and MgCO3. The high concentration CO2 could be obtained by the multistage adsorption/desorption cycles. The sorbent could be completely regenerated at 480 degrees C, and the adsorption capacity remained unchanged after 6 cycles. Furthermore, the application of a conceptual CO2-capture process using this sorbent was proposed for an existing coal-fired power plant.