The dependence Of SO2 removal on Cu loading, SO2 concentration, and temperature are studied experimentally on a thermo-balance using a series of CuO/Al2O3 catalysts in the fresh state as well as in a NH3-regenerated state. A kinetic study on SO2 removal is then carried out using a surface model, which assumes the SO2 removal rate is being controlled by a surface chemical reaction and takes into account the effect Of SO2 adsorption and consumption of surface CuO. The difference in SO2 removal between fresh and regenerated CuO/Al2O3 is expressed by a parameter n, which is similar to the order of a reaction. The effect Of SO2 adsorption is expressed in the Langmuir-Hinshelwood form. The results show that the SO2 removal behavior of NH3-regenerated CuO/Al2O3 is different from that of fresh CUO/Al2O3 and the developed model describes the SO2 removal behavior well.