过渡金属氧化物负载对Nd_2O_3基催化剂同时去除NO_x-炭烟活性的影响  

Effect of loading transition metal oxide on Nd_2O_3-based catalysts for simultaneous removing of NO_x and soot

作　　者：张海蓉[1] 王仲鹏[1] 上官文峰[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《工业催化》2007年第12期62-65,共4页Industrial Catalysis

基　　金：GM中国科学基金研究项目(50222203);上海市纳米技术专项基金(0652nm048)

摘　　要：利用程序升温反应技术(TPR)详细考察了负载K和不同过渡金属在Nd2O3基复合氧化物催化剂的催化活性,探讨了不同负载量对NOx-炭烟同时催化去除活性的影响。研究结果表明,负载Cr具有最好的炭烟催化活性,其最佳负载质量分数为10%;负载Mn具有最大的NOx→N2转化率;复合晶相的生成提高NOx-炭烟同时催化去除活性。Simultaneous catalytic removal of NOx and soot over Nd2O3-based mixture oxides loaded with potassium and transition metal oxides was investigated by using temperature programmed reaction technique （ TPR）, and the influence of the loading amount on the catalytic activity was discussed. The results showed that chromium oxide was superior to the other transition metal oxides with respect to enhancing the activity of soot oxidation. The optimum loading of chromium was about 10% （mass fraction）. The catalyst with loading Mn resulted in the biggest conversion efficiency of NO to N2. The formation of complex crystalline phase in the catalyst promoted the catalytic activity of removing NOx-soot.

关 键 词：NOx 炭烟 同时去除 催化 ND2O3 

分 类 号：TQ426.94[化学工程] X701[环境科学与工程—环境工程]