Abstract
A series of CeO 2 supported V 2O 5 catalysts with various loadings were prepared with different calcination temperatures by the incipient impregnation. The catalysts were evaluated for low temperature selective catalytic reduction (SCR) of NO with ammonia (NH 3). The effects of O 2 and SO 2 on catalytic activity were also studied. The catalysts were characterized by specific surface areas (S BET) and X-ray diffraction (XRD) methods. The experimental results showed that NO conversion changed significantly with the different V 2O 5 loading and calcination temperature. With the V 2O 5 loading increasing from 0 to 10 wt%, NO conversion increased significantly, but decreased at higher loading. The optimum calcination temperature was 400°C. The best catalyst yielded above 80% NO conversion in the reaction temperature range of 160°C-300°C. The formation of CeVO 4 on the surface of catalysts caused the decrease of redox ability.