Dehydration of Ethanol to Ethylene over WO<sub>3</sub>/HZSM-5

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Abstract A series of WO₃/HZSM-5 catalysts with different WO₃ loadings were prepared by impregnation method. The effects of WO₃ loadings and reaction conditions on dehydration of ethanol to ethylene were investigated. The catalysts were characterized by Xray diffraction (XRD), N2 adsorptiondesorption and NH3 temperature programmed desorption (NH3-TPD). The results showed that doping a small quantity of WO₃ would not destroy the framework structure of HZSM-5 while the surface acidity greatly changed. The activity for ethanol dehydration depended on the acid sites on the catalyst surface, and the increasing the ratio of weak acid sites to strong acid sites would improve the activity for ethanol dehydration. The best catalytic performance was obtained over 10% WO₃/HZSM-5. Under the optimized reaction temperature of 300 ℃and weight hourly space velocity (WHSV) of 9.8 h^-1, the ethanol conversion and the ethylene selectivity of 10% WO³/HZSM-5 were up to 100%. 

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	Articles by authors
	HU Tong-Yu
	GUO Cui-Li
	ZHANG Jin-Li

Keywords： ethanol dehydration ethylene WO₃/HZSM-5

Cite this article:

HU Tong-Yu, GUO Cui-Li, ZHANG Jin-Li.Dehydration of Ethanol to Ethylene over WO₃/HZSM-5[J] Chemcial Industry and Engineering, 2011,V28(4): 34-38

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