SBA-15负载铁基氧化物催化剂上丙烷选择氧化催化性能的研究  

Study on the catalytic performance of SBA-15-supported Fe-based oxide catalysts for the selective oxidation of propane

作　　者：韩丽艳[1] 罗燕[2] 刘坚[2] 赵震[2] 王宏宣[2] 段爱军[2] 姜桂元[2] 

机构地区：[1]吉林工业职业技术学院应用化工系,吉林吉林132013 [2]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《工业催化》2011年第11期46-50,共5页Industrial Catalysis

基　　金：国家自然科学基金(21173270;21177160;20803093;20833011)资助项目;国家高技术研究发展计划(863计划)(2009AA06Z313)资助项目;新世纪优秀人才支持计划(NCET-10-0811)资助项目;博士点基金(200804251016)资助项目;中国石油(2011D-4604-0101)资助项目;创新基金(2010D-5006-0402)资助项目

摘　　要：用等体积浸渍法制备了SBA-15负载铁基和钾修饰的Fe基氧化物催化剂,使用紫外-拉曼光谱对催化剂结构进行表征,并评价催化剂对丙烷的选择氧化活性与选择性。结果表明,介孔结构SBA-15对丙烷选择氧化活性优于常规的SiO_2;对于负载K-Fe/SBA-15系列催化剂,低Fe负载量时,隔离的四配位Fe氧化物是丙烷选择氧化生成醛类化合物的活性物种,高Fe负载量时,聚合态和微晶态的Fe氧化物是丙烷氧化脱氢或深度氧化的活性物种。A series of SBA-15-supported transitional metal iron oxides catalysts with different loading a- mounts of active components were prepared by the method of incipient-wet impregnation, and their cata- lytic activity and selectivity for the selective oxidation of propane were investigated. The structures of the catalysts were characterized by means of UV Raman spectra. The results demonstrated that for K-Fe/ SBA-15 catalysts, when iron loading amount is low, the isolated four coordination iron oxides are the main active sites for the production of aldehydes in selective oxidation of propane. However, when the iron loading amount is high, the polymeric and amorphous states of iron oxides are accounted for propane oxidation dehydrogenation or deep oxidation.

关 键 词：催化化学 丙烷 选择氧化 SBA-15 负载Fe基氧化物 钾修饰 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]