Catalytic dehydration of ethanol to ethylene over alkali-Treated HZSM-5 zeolites

Journal of the Brazilian Chemical Society

Qingtao Sheng²  Shaoqing Guo¹  Kaicheng Ling²  Liangfu Zhao¹ 

[1] ,Taiyuan University of Technology College of Chemistry and Chemical Engineering Taiyuan Shanxi ,P. R. China

关键词: HZSM-5;    alkali treatment;    ethanol dehydration;    desilication;   

DOI  :  10.5935/0103-5053.20140118

来源: SciELO

【 摘 要 】

The catalytic performance of alkali-treated HZSM-5 catalysts was investigated in a continuous fixed-bed microreactor. The properties of the parent and modified HZSM-5 catalysts were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption and temperature programmed desorption of NH3 (NH3-TPD). The results show that the alkali treatment is a suitable method to modify the HZSM-5 catalyst for ethanol dehydration to ethylene. The HZSM-5 catalyst with 0.4 mol L-1 NaOH shows high activity and good stability. The improved catalytic performances of alkali-treated catalysts are mainly attributed to the created mesopores and the decreased number of strong acid sites during the alkali treatment.

【 授权许可】

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