堇青石负载的Fe-Ni基催化剂对合成气合成C_2烃的影响  

Effect of cordierite supported Fe-Ni-based catalysts on synthesis of C_2 hydrocarbons from syngas

作　　者：张盼盼[1,2] 罗学刚[1,2] ZHANG Panpan;LUO Xuegang(School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China;Engineering Research Center of Biomass Materials, Ministry of Education,Southwest University of Science and Technology, Mianyang 621010,China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]生物质材料教育部工程研究中心,四川绵阳621010

出　　处：《功能材料》2018年第3期3160-3166,共7页Journal of Functional Materials

基　　金：国家农业科技成果转化资助项目(2012G2006004);青海省科技支撑计划资助项目(2015-SF-119)

摘　　要：以堇青石为载体,采用浸渍法制备了一系列不同镍负载量的新型Fe-Ni基催化剂,并利用SEM、TEM、XRD、EDX、XPS手段对催化剂的结构和形貌等进行表征。研究发现,当镍的负载量为0.6%(质量分数)时,Fe-Ni基催化剂的分散性达到最好,导致催化合成C2烃效果最明显。此外,研究不同温度、空速、H2∶CO比例对合成C2烃的影响。结果表明,在450℃,H_2∶CO比例为2,反应空速为2 800mL/g cat-h情况下,一氧化碳转化率达到58.5%,C2烃的选择性达到37.7%,其中乙烯的选择性达26.6%,具有优异的催化合成效果。综上所述,0.6%(质量分数)镍负载量的Fe-Ni基催化剂对合成气合成乙烯以及C2烃,具有高催化效果,为工业生产乙烯以及C2烃提供新的参考与依据。A series of Fe-Ni based catalysts loaded with different nickel content were prepared by impregnation method with cordierite as carrier.The structure and morphology of the catalyst were characterized by SEM,TEM,XRD,EDX and XPS methods.It was found that Fe-Ni-based catalyst with the best dispersivity had an obviously effects on the synthesis of C2hydrocarbon when the loading of Ni content was0.6wt%.In addition,the effects of the reaction temperature,space velocity and H2/CO molar ratio on the synthesis of C2hydrocarbons were also discussed in detail.The catalytic performance for syngas was investigated in a continuous tube furnace under reaction conditions of H2/CO=2,GHSV=2800mL/g cat-h,and450℃.The results showed that the selectivity of C2hydrocarbon and conversion of carbon monoxide was up to37.7%and58.5%,respectively,and ethylene selectivity was up to26.6%,which showed excellent catalytic synthesis effect.In summary,Fe-Ni-based catalyst had high catalytic effect on synthesis of C2hydrocarbons and ethylene from syngas,which laid the foundation of reference for the industrial synthesis of ethylene and C2hydrocarbon.

关 键 词：堇青石 催化剂 合成气 一氧化碳 C2烃 选择性 

分 类 号：TE624.43[石油与天然气工程—油气加工工程]