新型复合金属氧化物催化剂用于汽车尾气NO_x净化的实验研究  

Experimental Study on Purification of NO_x in Automobile ExhaustUsing a New Type of Complex MetalOxide Catalyst

作　　者：徐春保[1] 吴胜利[1] 苍大强[1] 寿秋爽 

机构地区：[1]北京科技大学冶金学院

出　　处：《环境科学》1998年第3期39-41,49,共4页Environmental Science

基　　金：国家教委留学回国基金

摘　　要：采用固定床反应装置，模拟汽车尾气，研究新型复合金属氧化催化剂ＷＣＸ－Ｉ（Ｒｅ－Ｎｉ－Ｃｏ－Ｃｕ－Ｏｘ／Ｆｅ２Ｏ３）对ＣＯ还原ＮＯ反应和ＣＨ４还原ＮＯ反应的催化活性，催化剂的抗ＳＯ２中毒性能，抗积炭性能．结果表明ＷＣＸ－Ｉ催化剂对ＮＯ／ＣＯ和ＮＯ／ＣＨ４反应均具有较好的高温活性．在本研究实验条件下，４００℃以上时ＣＯ对ＮＯ的稳定还原率在９３％以上，６００℃以上时ＣＨ４对ＮＯ的稳定还原率在９２％以上．在１０００ｍｌ／ｍ３ＳＯ２－Ｎ２的高硫气氛中强制中毒及在１．Simulating the compositions of automobile exhaust,some studies on a new type of complex metallic oxide catalyst WCXI(Re-Ni-Co-Cu-O_x/Fe_2O_3) have been conducted in a fixedbed reactor by the authors.These studies include catalytic activity of the catalyst on NO/CO and NO/CH_4 reactions,resistance to SO_2poisoning and carbondeposition.The experimental results showed that the catalyst not only gives better catalytic activity on NO/CO reaction and NO/CH_4 reaction at higher temperatures,e.g.higher than 93% stable reduction ratio (SRR) was achieved when temperature higher than 400℃ for NO/CO reaction,and higher than 92% SRR was achieved when temperature higher than 600℃ for NO/CH_4 reaction.Also the catalyst shows better resistance to SO_2poisoning and carbondeposition.After several hours compulsory SO_2poisoning and carbondeposition in the atmosphere of 1000ml/m^3 SO_2N_2 and 1.0% CO10% CO_2N_2,the catalyst still shows much high catalytic activities.

关 键 词：复合金属氧化物 催化剂 净化 废气处理 

分 类 号：X799.01[环境科学与工程—环境工程]