镧铈复合氧化物修饰的Cu-Co合金催化剂用于合成气直接制乙醇  

La-Ce-O Modified Cu-Co Alloy Catalysts for Direct Ethanol Synthesis from Syngas

作　　者：金武 刘贵龙 安康 王嘉明 宋兆钰 刘源[1] Jin Wu;Liu Guilong;An Kang;Wang Jiaming;Song Zhaoyu;Liu Yuan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;School of Chemistry and Chemical Engineering,Luoyang Normal University,Henan Luoyang 471934,China)

机构地区：[1]天津大学化工学院,天津300072 [2]洛阳师范学院化学化工学院,河南洛阳471934

出　　处：《化学工业与工程》2020年第6期1-9,共9页Chemical Industry and Engineering

基　　金：国家自然科学基金(51904152);天津市生态环境治理科技重大专项项目专项(18ZXSZSF00070)。

摘　　要：Cu-Co双金属的结构和组成决定了其催化合成气直接制乙醇的性能。通过柠檬酸络合辅助的等体积浸渍法制备了ZrO2负载的钙钛矿型复合氧化物La0.95 Ce0.05 Co0.7 Cu0.3 O3,经原位还原,得到了La-Ce-O掺杂的ZrO2担载的Cu-Co双金属催化剂。结果表明,催化剂中活性组分以Cu-Co合金的形式存在,且Cu-Co合金高度分散于载体表面,而La-Ce-O以复合氧化物的形式存在。该催化剂用于合成气直接制乙醇,在温度为280℃,压力为4 MPa,空速为3900 mL·(g·h)^-1,V(H2)∶V(CO)∶V(N2)=8∶4∶1的反应条件下,CO转化率为9%,总醇的选择性为29.7%,总醇中乙醇的选择性为63.5%,具有优良的催化性能。The catalytic performances of copper-cobalt catalysts for direct ethanol synthesis from syngas were determined by the structure and composition of bi-metallic Cu-Co.The perovskite-type composite oxide of La0.95 Ce0.05 Co0.7 Cu0.3 O3 supported on ZrO2 was prepared via an incipient wetness impregnation combing citrate complexing method,after in-situ reduction,Cu-Co bimetal loaded on La-Ce-O doped ZrO2 was obtained.The results showed that the active components in the catalyst were in forms of Cu-Co alloy and Cu-Co alloy were highly dispersed on the surface of ZrO2,while La-Ce-O were in forms of composite oxide.The catalyst exhibited excellent catalytic performance for direct ethanol synthesis from syngas,specially,the conversion of CO is 9%,the selectivity of alcohol is 31.4%and the selectivity of ethanol is 63.5%at a GHSV of 3900 mL·(g·h)^-1 in the syngas mixture of H2/CO/N2=8/4/1,4 MPa and 280℃in the fixed-bed reactor.

关 键 词：铜钴合金 乙醇合成 合成气 铈 钙钛矿型复合氧化物 

分 类 号：O643.36[理学—物理化学]