载体对Cu-Co催化剂催化CO_2加氢合成乙酸反应的影响  

Effect of Supports on Cu-Co Catalyst Performance for Synthesis of Acetic Acid from CO_2 Hydrogenation

作　　者：刘源[1] 黄伟[1] 喻仕瑞[1,2] 王晓东[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024 [2]贵州大学,贵州贵阳550025

出　　处：《煤化工》2012年第5期80-83,共4页Coal Chemical Industry

基　　金：国家自然科学基金(21176167);973计划(2011CB211709);贵州省科学技术基金(黔科合J字[2012]2154号);教育部博士点基金优先发展领域课题(20111402130002);教育部科学技术研究重点项目(212021)

摘　　要：采用等体积浸渍法制备了以TiO2、Al2O3、SiO2为载体的Cu-Co基双金属催化剂,在固定床反应器上,考察了其催化CO2加氢合成乙酸的性能,并用X射线衍射、NH3-TPD、H2-TPR等对催化剂进行了表征。结果表明,以TiO2为载体的Cu-Co基催化剂有最好的催化活性和选择性,乙酸生成速率可达16.41 mg/(gcat.h),选择性为81.3%。研究认为,催化剂表面适量的中强酸性、金属良好的分散性以及CuCo2O4的生成是影响催化性能的关键因素。Cu-Co bimetallic catalysts were prepared by equal volume impregnation. The effect of supports was inves- tigated for synthesis of acetic acid from CO2 hydrogenation. The catalysts were characterized by XRD, NH3-TPD and H2- TPR. The results showed that the supports had a great impact on the catalytic performance. Compared with A1203 and SiO2, TiO2 as the support was the best, the formation rate of acetic acid reached 16.41 mg/（gcat, h）, and the corresponding se- lectivity was 81.3 %. It concluded that the dispersion of the active metal over TiO2, the amount of surface acidity and the formation of CuCo2O4 also favored the reaction.

关 键 词：CO2 乙酸 加氢合成 载体 Cu—Co催化剂 

分 类 号：TQ225.122[化学工程—有机化工]