SBA-15负载纳米CoMoO_4催化剂催化丙烷氧化脱氢制丙烯(英文)  

Nanostructured CoMoO_4 Supported on Mesoporous SBA-15 for Catalytic Oxidative Dehydrogenation of Propane to Propene

作　　者：裴素朋[1] 张斌[1] 焦昆[1] 包任烈[1] 岳斌[1] 贺鹤勇[1] 

机构地区：[1]复旦大学化学系,上海市分子催化和功能材料重点实验室,上海200433

出　　处：《物理化学学报》2008年第4期561-564,共4页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展计划(2003CB615807);国家自然科学基金(20633030,20371013,20721063);上海市科学技术委员会研究项目(06DJ14006);上海市重点学科计划(B108)资助

摘　　要：采用柠檬酸配位-浸渍法制备不同CoMoO4含量的系列CoMoO4/SBA-15催化剂,通过X射线衍射、透射电镜和低温N2吸附法对样品进行了表征.结果表明,柠檬酸配位-浸渍法可在介孔分子筛孔道中形成高含量、均匀分散且有确定晶相的CoMoO4,同时能够很好地保持载体的介孔结构.与非负载的CoMoO4相比,由柠檬酸配位-浸渍法制备的CoMoO4/SBA-15催化剂在丙烷氧化脱氢反应中具有更好的催化活性,当CoMoO4的含量为13%(w)、反应温度为823K时,丙烯产率达到16.8%.Nanostructured cobalt molybdate catalysts supported on mesoporous silica SBA-15 with different loadings were prepared by citric acid coordination-impregnation method and characterized by XRD, TEM, and BET techniques. The characterization results showed that high loading of well-dispersed crystalline CoMoO4 may be achieved using citric acid coordination-impregnation method and the mesoporous structure of the support remained intact. The catalytic ,activity of these catalysts in the oxidative dehydrogenation of propane was investigated. The catalysts of nanostructured cobalt molybdate supported on mesoporous silica SBA-15 showed better catalytic performance than the corresponding bulk composite oxide and nanostructured CoMoO4 supported on SBA-15 with loading of 13% （mass fraction, w） displayed propene yield of 16.8% at 823 K.

关 键 词：纳米钼酸钴 介孔分子筛SBA-15 氧化脱氢 丙烷 丙烯 

分 类 号：O643.32[理学—物理化学] O623.12[理学—化学]