助剂对CuO-ZnO-Al_(2)O_(3)甲醇合成催化剂性能的影响  

Effects of promoters on performance of CuO-ZnO-Al_(2)O_(3) methanol synthesis catalysts

作　　者：蔡洪城 周菊发 孙晨 张可羡 贺安平 黄晨 丁明月 蒋莉萍 赵安民 Cai Hongcheng;Zhou Jufa;Sun Chen;Zhang Kexian;He Anping;Huang Chen;Ding Mingyue;Jiang Liping;Zhao Anmin(State Engineering Research Center for C1 Chemistry,State Key Laboratory of Industrial Vent Gas Reuse,Southwest Institute of Chemical Co.,Ltd.,Chengdu 610225,Sichuan,China)

机构地区：[1]国家碳一化学工程技术研究中心,工业排放气综合利用国家重点实验室,西南化工研究设计院有限公司,四川成都610225

出　　处：《工业催化》2021年第11期30-35,共6页Industrial Catalysis

基　　金：四川省重点研发项目(大型化甲醇合成催化剂国产化2019YFG0531)。

摘　　要：采用共沉淀法分别制备含助剂MgO、Ga_(2)O_(3)、ZrO_(2)和CeO_(2)的CuO-ZnO-Al_(2)O_(3)甲醇合成催化剂,考察助剂对催化剂性能的影响,并采用XRD、TPR、SEM、TG-DTG、N_(2)低温吸附-脱附对催化剂进行表征。结果表明,助剂ZrO_(2)增加了催化剂的比表面积,改善活性组分Cu的分散度,促进了铜锌之间的相互协同作用,从而提高了催化剂的活性和热稳定性。在反应温度235℃、反应压力5 MPa、空速10000 h^(-1)、H_(2)与C体积比为4.0条件下,甲醇时空收率达1.54 g·(h·mL)^(-1),老化后甲醇时空收率达1.42 g·(h·mL)^(-1)。CuO-ZnO-Al_(2)O_(3) methanol synthesis catalysts containing MgO,Ga_(2)O_(3),ZrO_(2) or CeO_(2) as the promoters were prepared respectively by co-precipitation method.Effects of the promoters on catalytic performance of methanol synthesis catalysts were investigated.The structure and properties of the catalysts were characterized by XRD,TPR,SEM,TG-DTG and N_(2)-physisorption.The results indicated that addition of ZrO_(2) increased surface area,promoted dispersion of the active components,and enhanced interaction between Cu and ZnO.The catalyst promoted by ZrO_(2) showed the best catalytic activity and heat resistance among the catalysts.Methanol space time yield was 1.54 g·(h·mL)^(-1) for fresh catalysts,and 1.42 g·(h·mL)^(-1) after aging under a specific condition(T=235℃,GHSV=10000 h^(-1),P=5 MPa and V_(H_(2))∶V_(C)=4.0).

关 键 词：催化剂工程 共沉淀 助剂 甲醇合成催化剂 

分 类 号：TQ426.6[化学工程] TQ223.121