The performance of a powder-particle spouted bed (PPSB) on the removal of CO2 is investigated. A laboratory scale PPSB is employed to investigate the effects of operating parameters such as approach to saturation temperature, static bed height, Ca/C molar ratio, inlet CO2 concentration and type of sorbent on CO2 removal efficiency. The experimental results show that the CO2 removal efficiency increases by increasing the static bed height, Ca/C molar ratio and inlet CO2 concentration, and decreases by increasing the approach to saturation temperature and superficial gas velocity. Also it is concluded that maximum CO2 removal efficiency could be up to 50% when approach to saturation temperature is 8K, Ca/C molar ratio is 1.4 and the static bed height is 0.225 m. (C) 2010 Elsevier B.V. All rights reserved.