MCM-41负载的La,Ce和Pt催化剂上三氯乙烯的低温催化燃烧  

Low-Temperature Catalytic Combustion of Trichloroethylene over La,Ce,and Pt Catalysts Supported on MCM-41

作　　者：王幸宜[1] 戴启广[1] 郑翊[1] 

机构地区：[1]华东理工大学工业催化研究所结构可控先进功能材料及其制备教育部重点实验室,上海200237

出　　处：《催化学报》2006年第6期468-470,共3页

基　　金：国家重点基础研究发展计划(2004CB719500);国家自然科学基金(20377012)资助项目

摘　　要：分别采用直接水热合成法和浸渍法制备了Si-MCM-41,La-Si-MCM-41和Ce-Si-MCM-41介孔材料及其负载的Pt催化剂.小角X射线衍射、氮气吸附和扩展X射线精细结构分析表明,La和Ce元素进入了MCM-41分子筛的骨架结构.NH3程序升温脱附测试未检测到含La和Ce样品表面的酸性.所制备的催化剂具有较高的三氯乙烯催化燃烧活性及生成CO2和HCl的选择性.La- and Ce-incorporated Si-MCM-41 and Pt catalysts supported on these materials were prepared. The samples were characterized by small angle X-ray diffraction, N2 adsorption, extended X-ray adsorption fine structure, and temperature-programmed desorption of NH3. The results showed that La and Ce were incorporated into the Si-MCM-41. No acidity was detected on the La- and Ce-containing catalysts. The obtained catalysts had high activity for the trichloroethylene catalytic combustion and high selectivity for CO2 and HC1.

关 键 词：三氯乙烯 催化燃烧 镧 铈 铂 MCM-41分子筛 

分 类 号：O643.32[理学—物理化学]