Direct oxidation of dimethyl ether to ethanol over WO₃/HZSM-5 catalysts

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• 作者：Guangbo Liu ; Qingde Zhang ; Yizhuo Han ; Yisheng Tan
• 关键词：DME ; Direct oxidation ; Ethanol ; WO3/HZSM-5 ; In situ FT-IR
• 刊名：Catalysis Communications
• 出版年：2012
• 出版时间：5 September, 2012
• 年：2012
• 卷：26
• 期：Complete
• 页码：173-177
• 全文大小：605 K

文摘

The direct oxidation of dimethyl ether (CH₃OCH₃, DME) to ethanol (CH₃CH₂OH) was carried out over WO₃/HZSM-5 catalysts in a continuous flow type fixed-bed reactor. The effects of different zeolite types, WO₃ loading and reaction temperature on the reaction were investigated. Our results showed that modification of HZSM-5 with 10 % WO₃ significantly improved the ethanol selectivity from 0.6 % to 19.7 % . The surface and structure of the catalysts were characterized by NH₃-TPD, BET, XRD and in situ FT-IR. Ethanol can be mainly synthesized from DME direct oxidation under the cooperation of trifunctional reactive sites offered by WO₃ modified HZSM-5 catalysts.