复合氧化物的制备及其在碳黑颗粒物氧化中的应用  

The preparation and catalytic performance of composite oxides used for soot oxidation catalyst in diesel exhaust

作　　者：高原[1] 庄新玲[1] 林文杰[1] 李赫[1] 孟秀红[1] 宋丽娟[1] 段林海[1] 

机构地区：[1]辽宁石油化工大学辽宁省催化科学与技术重点实验室,辽宁抚顺113001

出　　处：《化工科技》2013年第3期15-19,共5页Science & Technology in Chemical Industry

基　　金：国家自然科学基金资助项目(20976077;20776064);辽宁省教育厅省创新团队项目(2009T061)

摘　　要：采用柠檬酸络合燃烧法合成钾铈和钾铈镧复合氧化物催化剂。利用XRD对复合氧化物进行了表征。利用程序升温反应(TPR)方法研究了其对碳黑颗粒物的催化氧化性能,考查了焙烧温度、焙烧时间、前驱体中K、Ce的物质的量比等制备条件对催化剂活性的影响及稳定性。结果表明:钾铈镧复合氧化物对碳黑颗粒物具有较高的催化活性和稳定性。K,Ce and K,Ce,La composite oxides were synthesized by citrate acid complex-combustion and characterized by XRD,and their catalytic activities towards soot oxidation were evaluated using the temperature programmed reaction（TPR）system.The impact of some factors,such as the calcination temperature and time,n（K）/n（Ce）of the precursors,repeated use,the contact type between catalysts and soot was also examined.The influence of the doping of a third metal component on catalytic activity and stability was studied by TPR.The results showed that K,Ce,La composite oxides had higher catalytic activity and better stability.

关 键 词：复合氧化物 柠檬酸络合燃烧法 碳黑颗粒物 催化氧化 

分 类 号：O643[理学—物理化学]