Abstract
Abstract The direct oxidation of dimethyl ether (CH 3 OCH 3 , DME) to ethanol (CH 3 CH 2 OH) was carried out over WO 3 /HZSM-5 catalysts in a continuous flow type fixed-bed reactor. The effects of different zeolite types, WO 3 loading and reaction temperature on the reaction were investigated. Our results showed that modification of HZSM-5 with 10% WO 3 significantly improved the ethanol selectivity from 0.6% to 19.7%. The surface and structure of the catalysts were characterized by NH 3 -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 WO 3 modified HZSM-5 catalysts.
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