提高Rh-Mn/SiO_2催化剂合成乙醇性能的途径研究  

Approaches for improving catalytic performance of Rh-Mn/SiO_2 in CO hydrogenation to ethanol

作　　者：柯雷[1] 惠贺龙[1] 王小华[1] 王鹏[1] 李子君[1] 韦云昭 舒新前[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《天然气化工—C1化学与化工》2014年第3期53-56,62,共5页Natural Gas Chemical Industry

基　　金：中央高校基本业务费专项资金(2010YH07)

摘　　要：通过实验分别研究了浸渍顺序、Mn负载量以及工况条件对Rh-Mn/SiO2催化剂上CO加氢合成乙醇反应的影响,并采用程序升温还原(TPR)技术对催化剂进行表征。结果表明:同时浸渍铑锰的催化剂的C2含氧化合物的时空产率达到255.8g/(kg·h),乙醇的选择性为15.39%,均高于分步浸渍的催化剂;Mn负载量影响Rh-Mn的相互作用,实验发现当催化剂w(Mn)为1.5%时,乙醇的选择性可升高到18.09%,同时可以抑制甲烷的生成。研究确定了Rh-Mn/SiO2催化CO加氢合成乙醇的最优工艺条件。The effects of impregnation sequence, Mn loading, and reaction conditions on the catalytic properties of the Rh-Mn/SiO2 for synthesis of ethanol from CO hydrogenation were investigated experimentally, and the catalysts were characterized by TPR. The results showed that the yield of C2-oxygenates for the catalyst co-impregnated with Rh and Mn could reach 255.8g·kg-1·h-1 with a selectivity to ethanol of 15.39%, and both of the yield and selectivity were higher than that for the catalysts step-impregnated with Rh and Mn. Mn loading affected the interaction between Rh and Mn. The catalyst loaded with Mn of 1.5% by mass could have a selectivity to ethanol of up to 18.09% and reduce the selectivity to methane. The optimum reaction conditions for CO hydrogenation to ethanol over the Rh-Mn/SiO2 catalyst were determined by experimental studies.

关 键 词：Rh-MnSiO2催化剂 制备 一氧化碳 加氢 合成 乙醇 反应条件 

分 类 号：O643[理学—物理化学] TQ426[理学—化学]