Cu-Fe基催化剂上合成气直接制取低碳烯烃的研究  

Catalytic Conversion of Syngas to Light Olefins over Cu-Fe based Catalyst

作　　者：方传艳[1] 位健 王锐 葛庆杰[1] 徐恒泳[1] 

机构地区：[1]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023 [2]北京低碳清洁能源研究所煤化工催化剂中心,北京102209

出　　处：《分子催化》2015年第1期27-34,共8页Journal of Molecular Catalysis(China)

基　　金：神华集团项目(RD12R007)

摘　　要：我们采用浸渍法制备了γ-Al2O3负载的Cu-Fe基催化剂,并结合其反应性能和XRD、H2-TPR和XPS等表征结果研究了其催化合成气直接制低碳烯烃的反应行为.结果表明,合成气直接制低碳烯烃Cu-Fe基催化剂的活性组分Cu和Fe之间存在明显的协同效应,Cu-Fe基催化剂表现出优异的合成气直接制低碳烯烃反应性能;Cu基催化剂中引入少量Fe组分明显提高了活性组分Cu的分散度,促进了Cu活性组分的还原,进而有利于催化剂反应性能的改进.初步推断Cu-Fe基催化剂上合成气转化生成低碳烯烃的主要反应历程为CO加氢生成含氧化合物(醇醚等)后再脱水生成低碳烯烃.In this paper,a Cu-Fe based catalyst was prepared by impregnation method with γ-Al2O3 support. Combined with characterization of XRD,H2-TPR and XPS,catalytic behaviors of prepared Cu-Fe based catalysts for syngas to light olefins have been studied. The results show that Cu-Fe-Cat exhibits better reaction performance of syngas to olefins than Cu-Cat and Fe-Cat,which indicates that a synergistic effect between Cu and Fe exists in CuFe-Cat,and such synergistic effect between Cu and Fe in Cu-Fe-Cat largely promotes CO conversion. The reaction path of syngas to light olefins over Cu-Fe-Cat has also been discussed,and the main reaction path over Cu-Fe-Cat is proposed that syngas conversion to light olefins via oxygenates.

关 键 词：Cu-Fe基催化剂 合成气 低碳烯烃 

分 类 号：O623.12[理学—有机化学]