含氮合成气直接制二甲醚的Cu基催化剂研究  

Study on the Cu-based Catalysts for Direct Synthesis of Dimethyl Ether from Syngas Containing N_2

作　　者：贾美林[1] 李文钊[1] 徐恒泳[1] 葛庆杰[1] 侯守福[1] 肖海成[2] 迟克彬[2] 郭继宁[2] 李影辉[2] 孔繁华[2] 

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]大庆石化公司研究院,黑龙江大庆164100

出　　处：《分子催化》2002年第1期35-38,共4页Journal of Molecular Catalysis(China)

基　　金：国家重点基础研究发展规划资助项目 ( G19990 2 2 40 1)

摘　　要：研究了 Cu O- Zn O- Al2 O3/ HZSM- 5系列双功能催化剂催化含 N2 合成气直接制二甲醚的性能 ,考察了助剂和催化剂制备方法对反应性能的影响 .结果表明 ,在 Cu O- Zn O- Al2 O3/ HZSM- 5催化剂中加入 Zr O2 ,有利于提高催化活性 ;用胶体沉积法制备的 Cu O- Zn O- Zr O2 - Al2 O3/ HZSM- 5双功能催化剂 ,其 Cu O晶粒小、分散好、易于还原 ,同时增强了各组分间的协同作用 。The effects of catalyst composition on the performance of the bifunctional catalyst for conversion syngas derived from natural gas CPO and air to dimethyl ether was investigated using XRD and TPR techniques. It was found that CuO ZnO ZrO 2 Al 2O 3/HZSM 5 is a good catalyst. Different preparation methods, including colloid sedimentation, precipitation sedimentation, impregnation, mechanical mixing, were studied as well. It was found that the catalyst prepared by colloid sedimentation provides the highest activity and the impregnation results in the lowest. Combined the results of XRD and TPR, it is deduced that high dispersion could decrease the temperature of reduction and enhance the activity. The results also demonstrate that preparation methods influence the combination of methanol synthesis and methanol dehydration and the synergetic effect between Cu and ZnO.

关 键 词：双功能催化剂 含氮合成气 二甲醚 铜基催化剂 催化性能 

分 类 号：O623.423[理学—有机化学] O643.361[理学—化学]