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Citation: 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. doi: 10.11944/j.issn.1000-0518.2015.01.140178 shu

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

1.
Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

Corresponding author: HUANG Wei,
Received Date: 13 May 2014
Available Online: 9 July 2014
Fund Project: 国家自然科学基金重点项目(21336006) (21336006)国家自然科学基金面上项目(21176176) (21176176)高等学校博士学科点专项(优先发展领域)(20111402130002) (优先发展领域)(20111402130002)

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.
- complete liquid-phase technology,
- dimethyl ether,
- Cu-Zn-Si-Al catalyst,
- silica sol
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