Citation: Zhao Shu-Fang, Yao Xu-Ting, Yan Bing-Hui, Li Li, Liu Yue-Ming, He Ming-Yuan. Flexible regulation of C₃⁼/C₂⁼ ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst[J]. Chinese Chemical Letters, ;2017, 28(6): 1318-1323. doi: 10.1016/j.cclet.2017.03.023 shu

Flexible regulation of C₃⁼/C₂⁼ ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China

Corresponding author: Liu Yue-Ming, ymliu@chem.ecnu.edu.cn
Received Date: 7 March 2017
Revised Date: 14 March 2017
Accepted Date: 14 March 2017
Available Online: 14 June 2017

Figures(4)

A very wide range of the C₃⁼/C₂⁼ ratio from 0.72 to 7.56 with high C₂⁼+C₃⁼ selectivity of around 66% in the methanol-to-hydrocarbons process can be realized over ZSM-5 catalyst in a fixed-bed reactor. We firstly conduct a single factor experiment of acidity, demonstrating that the acidity control of MTH catalyst is crucial to adjusting light olefins selectivity. Weak Brønsted acid sites favor to high C₃⁼ selectivity (59.0%) due to the suppression of the conversion reactions from the alkene-based to arene-based cycle, while Lewis acid sites conduce to high C₂⁼ selectivity (39.6%) due to the promotion of the conversion reactions for the aromatics formation and steric constraints of Lewis acid sites making the aromatics crack more efficiently to C₂⁼.
- Acidity,
- Methanol-to-hydrocarbons,
- Lewis acidity,
- Olefins,
- Zeolites
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Flexible regulation of C3=/C2= ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst

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Flexible regulation of C₃⁼/C₂⁼ ratio in methanol-to-hydrocarbons by delicate control of acidity of ZSM-5 catalyst