载体对草酸二甲酯加氢铜基催化剂性能的影响  

Influence of Supports on Performance of Cu-based Catalyst for Dimethyl Oxalate Hydrogenation

作　　者：李美兰[1,2] 马俊国[1] 徐东彦[2] 葛庆杰[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]青岛科技大学化工学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2014年第3期283-286,共4页Journal of Qingdao University of Science and Technology:Natural Science Edition

摘　　要：分别以硅溶胶、SBA-15、二氧化硅粉末和ZSM-5为载体,采用蒸氨均匀沉积沉淀法,制备了一系列草酸二甲酯加氢制乙二醇Cu基催化剂(Cu质量分数为20%),并对其催化草酸二甲酯加氢性能进行了考察。结果表明,以二氧化硅粉末为载体的催化剂加氢性能最佳,其草酸二甲酯转化率为100%,对乙二醇的选择性为84%。催化剂酸性强弱对加氢反应产物分布有一定影响,酸性较强的催化剂易使得副产物乙二醇单甲醚的量增加。活性组分Cu在载体表面的分散状况对反应的加氢深度有一定影响。A series of Cu-based catalysts were prepared by ammonia-evaporation method with silica sol,SBA-15,fumed silica and ZSM-5（50）as the support,respectively.The content of Cu in all the as-prepared catalysts is 20%.The performance of those catalysts for dimethyl oxalate hydrogenation was evaluated.The results show that the catalyst with fumed silica as the support exhibits the highest dimethyl oxalate conversion 100%and ethylene glycol selectivity 84%.The acidity of catalysts influences the distribution of products,while the dispersion of Cu affects the degree of hydrogenation.

关 键 词：草酸二甲酯 乙二醇 CU 载体 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]