中文摘要：

采用浸渍法制备了系列V2O5／CeO2催化剂，用于低温NH3选择性催化还原（NH3-SCR）NO．同时，考察了催化剂中V2O5负载量和煅烧温度对催化活性的影响，并运用SEM、BET和XRD物理化学技术对催化剂进行了表征．结果表明，V2O5／CeO2催化剂对模拟烟气中的NO转化呈现出较高的活性，但是V2O5负载量和催化剂的催化活性并不呈线性递增的关系．当V2O5负载量超过10％时，催化剂的催化活性开始下降．随着煅烧温度的升高，由于钒酸铈的生成，催化剂的催化活性下降．400℃为最佳煅烧温度．

英文摘要：

A series of CeO2 supported V2O5 catalysts were prepared by incipient impregnation for low temperature selective catalytic reduction （SCR） of NOx with ammonia （ NH3 ）. The effects of V2O5 loading of catalysts and calcination temperature on the catalytic activity were investigated. A combination of various physicochemical techniques such as SEM, BET surface area and X-ray diffraction （XRD） were used to characterize the catalysts. The experimental results showed that the V2O5/CeO2 catalysts had high activity, bat V2O5 loading and catalytic activity had no linear relationship. NO conversion increased significantly when the V2O5 loading was from 0 to 10% , but decreased at higher loading. As calcination temperature increased, catalytic activity decreased by the formation of CeVO4. The best calcination temperature was 400℃.