中文摘要：

采用高比表面积、抗硫、抗湿的新型USY分子筛为载体制备MnOr催化剂，考察了以CH4为还原剂，在不同Mn含量MnOx催化剂上，选择性催化还原NOx的性能和有关影响因素。研究表明：5％（wt．）的Mn／H-USY具有最高的NO选择性还原活性，在500℃时NOx达最大转化率20．8％；分段填装Mn／H-USY和Ni／H-USY催化剂可显著拓宽活性温度范围，促进NO转化率（最高转化率可达24．4％），降低N2O生成量。本实验中使用傅立叶红外分析仪进行在线检测反应物与产物浓度。

英文摘要：

Since the USY （ultra-stable Y zeolite） has high thermostability, excellent sulfur and water tolerance ability, it was selected to be used as the supporter for the catalysts of NOx reduction. By using the USY supported MnOx catalysts with Mn loading from 1%（wt.） to 15%（wt.）, the selective catalyric reduction of NOx with CH4 as reductor in the presence of excess oxygen was investigated. During which, the FTIR （Fourier transform infrared spectroscopy） was used to analyses the concentration of the reactants and products of the reduction process. The results show that the conversion of NO to N2 is related to the loading of Mn on the supported MnOx catalyst and its maximum conversion rate of 20.8% can be reached over the H-USY supported MnOx catalyst with 5%（wt.） loading of Mn at 500℃. The experiments also show that when the reactor is successively and separately filled with two kinds of catalysts, Mn/H-USY and Ni/H-USY, the temperature window of NO conversion can be broadened （the conversion rate reaches 24.4%） and meanwhile the formation of N20 can be inhibited.