Ce-Mn复合氧化物对二溴甲烷燃烧的催化性能  

Catalytic performance of dibromomethane combustion over Ce-Mn mixed oxide

作　　者：刘风芬[1] 陈献[1] 汤吉海[1] 崔咪芬[1] 乔旭[1,2] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2010年第6期31-35,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA03Z504)

摘　　要：采用共沉淀法制备Ce-Mn复合氧化物及单组分Ce、Mn氧化物催化剂,考察它们对精对苯二甲酸氧化尾气中二溴甲烷燃烧的催化活性.通过X线衍射（XRD）、H2程序升温还原（H2-TPR）对催化剂的晶相结构进行表征.结果表明：由于Mn3＋进入了CeO2晶格中,制备的Ce-Mn复合氧化物形成均一的固溶体结构,具有优异的低温还原性能,对二溴甲烷的催化燃烧性能显著优于单组分Ce、Mn氧化物催化剂.当催化剂床层入口温度高于283℃,二溴甲烷体积分数为0.4%~1.0%,空速小于24 000 h-1时,二溴甲烷转化率大于95%,Br2及HBr的总收率可以达到83%以上.The Ce-Mn mixed oxide and the single-component oxide catalysts were prepared by co-precipitation method,and their catalytic activity on dibromomethane combustion was investigated.The crystal structure was characterized by X-ray diffraction（XRD） and temperature programmed hydrogen reduction（H2-TPR）.Results showed that a homogeneous solid solution was formed in Ce-Mn mixed oxide which indicated excellent low temperature reduction ability because the manganese ion had entered into the CeO2 lattice,and the catalytic combustion performance of the dibromomethane was much better than that on single-component oxide catalysts.95% conversion of dibromomethane and 83% total yeild of Br2 and HBr could be obtained when the reaction conditions were as follows： the inlet temperature of catalyst bed higher than 283 ℃;the volume fraction of dibromomethane of about 0.4%-1.0%;the space velocity less than 24 000 h-1.

关 键 词：Ce-Mn复合氧化物 二溴甲烷 催化燃烧 共沉淀法 

分 类 号：TQ038.4[化学工程]