Citation: Baohui Chen, Jiazheng Lu, Lianping Wu, Zisheng Chao. Dehydration of bio-ethanol to ethylene over iron exchanged HZSM-5[J]. Chinese Journal of Catalysis, ;2016, 37(11): 1941-1948. doi: 10.1016/S1872-2067(16)62524-X shu

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

a State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment, Hunan Electric Power Corporation Disaster Prevention and Reduction Center, State Grid Key Laboratory of Power Transmission and Distribution Equipment Anti-Icing & Reducing-Disaster Technology, Changsha 410007, Hunan, China;
b State Key Laboratory of Chemo/ Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China

Received Date: 27 May 2016
Revised Date: 3 August 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21376068) and the China Postdoctoral Science Foundation (2016M592424).

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 eth-anol at 260℃ 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, espe-cially the strong acid sites and Brönsted acid sites. The doped iron species were distributed over Fe-ZSM-5 as predominantly isolated Fe³⁺. Therefore, the catalytic performance for ethanol dehydra-tion to ethylene was improved.
- Iron,
- ZSM-5,
- Dehydration,
- Ethanol,
- Ethylene
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