Dehydration of bio-ethanol to ethylene over iron exchanged HZSM-5

被引：27
作者：
Chen, Baohui [1 ,2 ]
Lu, Jiazheng [1 ]
Wu, Lianping [2 ]
Chao, Zisheng [2 ]
机构：
[1] Hunan Elect Power Corp, State Grid Key Lab Power Transmiss & Distribut Eq, State Key Lab Disaster Prevent & Reduct Power Gri, Disaster Prevent & Reduct Ctr, Changsha 410007, Hunan, Peoples R China
[2] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2016年 / 37卷 / 11期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Iron; ZSM-5; Dehydration; Ethanol; Ethylene; ZSM-5; ZEOLITES; CATALYTIC DEHYDRATION; AQUEOUS-ETHANOL; TRANSFORMATION; HYDROCARBONS; CONVERSION; FE; H-ZSM-5; ACID; PERFORMANCE;
D O I：
10.1016/S1872-2067(16)62524-X
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Iron exchanged ZSM-5 with Si/Al ratio from 25 to 300 prepared by three consecutive ion exchanges was used for the dehydration of ethanol to ethylene. The iron exchanged ZSM-5 (Si/Al = 25) catalyst with an iron content of 0.46 wt% gave 97%-99% yield of ethylene at 98%-99% conversion of ethanol at 260 degrees C and 0.81 h(-1) liquid hourly space velocity. The high performance was maintained for 60 d on-stream. X-ray diffraction, Fourier transform infrared spectroscopy of pyridine adsorption, NH3 temperature-programmed desorption and diffuse reflectance UV-vis spectroscopy were used for catalyst characterization. Ion exchange with iron decreased the total acidity of the zeolite, especially the strong acid sites and Bronsted acid sites. The doped iron species were distributed over Fe-ZSM-5 as predominantly isolated Fe3+. Therefore, the catalytic performance for ethanol dehydration to ethylene was improved. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：1941 / 1948
页数：8
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