| 二甲醚催化转化制甲苯的反应研究 |
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| 引用本文： | 王博,王辉,刘广波,李琢,李学民,吴晋沪. 二甲醚催化转化制甲苯的反应研究[J]. 燃料化学学报, 2014, 42(8): 994-1000 |
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| 作者姓名： | 王博 王辉 刘广波 李琢 李学民 吴晋沪 |
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| 作者单位： | 1. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | 中国科学院重大科研装备研制项目(2011022);中国科学院战略先导专项(XDA07070301);山东省“泰山学者”岗位项目(ts200824085) |
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| 摘 要： | 在氧气气氛中,对氧化钨改性的不同分子筛催化剂上二甲醚(DME)转化反应进行了评价。结果表明,WO3/HZSM-5催化剂上DME可以高选择性转化为甲苯,对其反应工艺条件进行了优化,常压、290℃、DME/O2比为2∶1时,二甲醚几乎完全转化,转化率为98.97%,甲苯的选择性达到39.71%。对催化剂结构和酸性进行表征,结果表明,ZSM-5分子筛的孔道结构最有利于甲苯的生成,WO3的介入调整了HZSM-5分子筛表面的酸性活性位点分布,在氧气气氛中有效地抑制了副产物的生成,使产物中甲苯的选择性提高。
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| 关 键 词： | 二甲醚 催化转化 甲苯 WO3/HZSM-5 |
| 收稿时间： | 2014-03-19 |
Catalytic conversion of dimethyl ether to toluene over the molecular sieves modified with tungsten oxide |
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| 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 |
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| Authors: | WANG Bo WANG Hui LIU Guang-bo LI Zhuo LI Xue-min WU Jin-hu |
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| Affiliation: | WANG Bo;WANG Hui;LIU Guang-bo;LI Zhuo;LI Xue-min;WU Jin-hu;Key Laboratory of Biofuels,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences;University of Chinese Academy of Sciences; |
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| Abstract: | 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. |
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| Keywords: | dimethyl ether catalytic conversion toluene WO3/HZSM-5 |
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