PDF全文下载:2014030283
李美兰1,2, 马俊国1, 徐东彦2*, 葛庆杰1*
(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)
摘要: 分别以硅溶胶、SBA15、二氧化硅粉末和ZSM5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。
关键词: 草酸二甲酯; 乙二醇; Cu; 载体
中图分类号: TP 273文献标志码: A
收稿日期: 20130419
作者简介: 李美兰(1988—),女,硕士研究生.*通信联系人.
Influence of Supports on Performance of Cubased Catalyst for Dimethyl Oxalate Hydrogenation
LI Meilan1,2, MA Junguo1, XU Dongyan2, GE Qingjie1
(1. Dalian Institute of Chemical Physics,ChineseAcademyof Sciences,Dalian116023,China;
2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: A series of Cubased catalysts were prepared by ammoniaevaporation method with silica sol, SBA15, fumed silica and ZSM5(50) as the support, respectively. The content of Cu in all the asprepared 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.
Key words: dimethyl oxalate; ethylene glycol; copper; support