中文摘要：

在固定床反应器中对溶胶凝胶法制备的锰铈催化剂进行脱硝实验、氧化实验和脱附实验.结果表明：MnOx/γ-Al2O3催化剂在300℃达到最佳脱硝效率,添加CeO2后,最佳脱硝效率对应温度降至250℃.CeO2的添加提高了低温条件下催化剂表面的氧化活化能力,但温度高于300℃时,NH3会发生过度氧化生成N2O副产物.MnOx负载量的增加会使NH3在催化剂表面的吸附量增多,且会增加NO在多种活性位上的吸附,从而使催化剂在更宽的温度范围内均表现出较高的催化效率.

英文摘要：

The denitrification performance experiments,oxidation experiments and desorption experiments have been carried out over MnOx/Al2O3 and MnOx-CeO2/γ-Al2O3 prepared by sol-gel process in a fixed bed reactor.The results show that MnOx/γ-Al2O3 catalysts reach highest NO removal efficiency at 300 ℃,after adding CeO2 into the catalyst,the optimum temperature reduces to 250 ℃.The addition of CeO2 improves the activation ability of the catalysts at low temperature,but can cause excessive oxidation of NH3 which generates by-products like N2O when the temperature is higher than 300℃.The increase of the MnOxcontent can raise adsorption quantities of NH3 over the catalysts,and can also promate NO adsorbtion on different active sites,therefore the catalysts have high NO removal efficiency in wider temperature range.