Performance of Cu-Zn-Si-Al Catalyst Prepared by a Complete Liquid-phase Techonology for Dimethyl Ether Synthesis

doi:10.11944/j.issn.1000-0518.2015.01.140178

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (1): 76-84.DOI: 10.11944/j.issn.1000-0518.2015.01.140178

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Performance of Cu-Zn-Si-Al Catalyst Prepared by a Complete Liquid-phase Techonology for Dimethyl Ether Synthesis

TANG Yu, HUANG Wei^*, HAN Tao, SUN Kai, WANG Peng

Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024,China

Received:2014-05-13 Revised:2014-07-09 Published:2015-01-06 Online:2015-01-06
Contact: Corresponding author:HUANG Wei, professor; Tel/Fax:0351-6018073; E-mail: huangwei@tyut.edu.cn; Research interests:C1 chemistry and chemical engineering
Supported by:
Supported by Key Program of National Natural Science Foundation of China(No.21336006), General Program of National Natural Science Foundation of China(No.21176176), Research Fund for the Doctoral Program of Higher Education of China(No.20111402130002)

Abstract

Abstract:

A series of Cu-Zn-Si-Al bifunctional catalysts for the synthesis of dimethyl ether(DME) was prepared by a liquid-phase technology. The catalysts were prepared with low-cost silica sol as the silica source. The addition of silica exhibits a strong promoting effect on the CO conversion and DME selectivity. When n(Si)/n(Al) is 2, the catalyst shows the best catalytic performance. The conversion of CO reaches 58.1% and the selectivity of DME is improved to 80.2%. The catalysts were characterized by FTIR, XRD, TPR,TPD,BET, XPS and TEM. The results show that the addition of silicon components can promote the dispersion of active components on the catalysts and decrease the carbon deposition caused by heat treatment in the liquid phase. In addition, the Si components interact with Al, which significantly improves the performance of the catalyst for methanol dehydration and the selectivity of DME.

Key words: complete liquid-phase technology, dimethyl ether, Cu-Zn-Si-Al catalyst, silica sol

CLC Number:

O643

TANG Yu,HUANG Wei ,HAN Tao,SUN Kai,WANG Peng. Performance of Cu-Zn-Si-Al Catalyst Prepared by a Complete Liquid-phase Techonology for Dimethyl Ether Synthesis[J]. Chinese Journal of Applied Chemistry, 2015, 32(1): 76-84.

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Performance of Cu-Zn-Si-Al Catalyst Prepared by a Complete Liquid-phase Techonology for Dimethyl Ether Synthesis

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