稀土复合钴基HMS催化剂的制备及其氯苯催化燃烧性能  

Synthesis of Co/HMS Modified by Rare Earths and Its Performance on Catalytic Combustion of Chlorobenzene

作　　者：赵伟[1] 李进军[1] 牟真[1] 郝郑平[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《中国稀土学报》2007年第1期22-26,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家重点基础研究发展规划项目973课题(2004CB719504)资助

摘　　要：以钴基HMS催化剂为主体,从稀土复合方式、不同稀土元素、稀土元素含量等方面系统考察了稀土元素对钴基HMS催化剂氯苯催化燃烧性能的影响。并将孔结构、XRD以及紫外可见漫反射等表征结果与催化活性进行了有效关联。结果发现:Ce较La和Nd能更好地改善钴基HMS的催化性能。同时发现,通过负载法进入HMS孔道的Ce较通过原位法掺杂在骨架的Ce具有更佳的促进作用,且当Ce盐(硝酸铈)的负载量为20%(质量分数)时,效果最好。The influence of the modified methods, different kinds of rare earths and the supported amount of rare earths on the catalytic performance of Co/HMS were studied by the catalytic combustion of chlorobenze. The results of XRD, UV-visible and N2 adsorption-desorption isotherms were related to the catalytic activity reasonably. It is found that the effect of Ce was better than that of La and Nd and rare earths in- corporated into the channel of HMS was more useful than the rare earths incorporated into the framework of HMS, and the best incorporated amount of rare earths was 20% （mass fraction）.

关 键 词：HMS 氯苯 催化燃烧 稀土 

分 类 号：O643.36[理学—物理化学]