焙烧温度对CuO/γ-Al2O3和CeO2-CuO/γ-Al2O3催化剂NO还原活性的影响

CuO/γ-Al2O3 and CeO2-CuO/γ-Al2O3 catalysts were prepared by impregnation. The effect of calcination temperature on C3H6-SCR of NO over CuO/γ-Al2O3 and CeO2-CuO/γ-Al2O3 catalysts CeO2 with different loadings was investigated. The results showed that calcination temperature had little effect on the activity of C3H6-SCR of NO over CuO/γ-Al2O3 when calcinated from 200 ℃ to 500 ℃. NO conversion sharply decreased when increasing the calcination temperature from 500 ℃ to 800 ℃. It could be caused by the formation of CuAl2O4, which was confirmed in XRD patterns. The activity of C3H6-SCR of NO over CuO/γ-Al2O3 catalyst could not be promoted by the addition of CeO2 calcinated at 500 ℃, while could be improved calcinated at 800 ℃. The highest NO conversion was achieved while the mole ratio of Ce to Cu was 1∶10.