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载体对草酸二甲酯加氢铜基催化剂性能的影响

作者:时间:2014-07-15点击数:

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、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。

 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: 20130419

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 Cubased Catalyst for Dimethyl Oxalate Hydrogenation

 LI Meilan1,2, MA Junguo1, XU Dongyan2, GE Qingjie1

 (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 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.

 Key words: dimethyl oxalate; ethylene glycol; copper; support

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