Citation: WANG Bo, WANG Hui, LIU Guang-bo, LI Zhuo, LI Xue-min, WU Jin-hu. Catalytic conversion of dimethyl ether to toluene over the molecular sieves modified with tungsten oxide[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(8): 994-1000. shu

Catalytic conversion of dimethyl ether to toluene over the molecular sieves modified with tungsten oxide

WANG Bo ^1,2 ,
WANG Hui ^1,, ,
LIU Guang-bo ¹ ,
LI Zhuo ¹ ,
LI Xue-min ^1,2 ,
WU Jin-hu ^1,,

1.
1. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;

Corresponding author: WANG Hui, WU Jin-hu,
Received Date: 19 March 2014
Available Online: 22 May 2014
Fund Project: 中国科学院重大科研装备研制项目(2011022) (2011022)中国科学院战略先导专项(XDA07070301) (XDA07070301)山东省"泰山学者"岗位项目(ts200824085)。 (ts200824085)

The catalytic performance of various zeolites modified with tungsten oxide in the conversion of dimethyl ether (DME) to toluene in the presence of oxygen was investigated in a continuous flow fixed-bed reactor. The results indicated that WO₃/HZSM-5 as a catalyst is highly selective in the conversion of DME to toluene; under the optimized conditions, i.e. atmospheric pressure, 290 ℃, and with a DME/O₂ mol ratio of 2:1, the conversion of DME is 98.97%, with the selectivity of 39.71% to toluene. The characterization results about the catalyst structure and acidity illustrate that the porous structure of ZSM-5 is suitable for the formation of toluene from DME. The doping of WO₃ adjusts the distribution of the surface acid sites and then inhibits the formation of side-products in the presence of oxygen, which is able to enhance the selectivity to toluene.
- dimethyl ether,
- catalytic conversion,
- toluene,
- WO₃/HZSM-5
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