Citation: Yan-nan ZHAO, Su-bing FAN, Qing-xiang MA, Jian-li ZHANG, Tian-sheng ZHAO. Methanol converting to propylene on weakly acidic and hierarchical porous MFI zeolite[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(2): 210-217. doi: 10.1016/S1872-5813(21)60175-5 shu

Methanol converting to propylene on weakly acidic and hierarchical porous MFI zeolite

1.
State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China

Corresponding author: Tian-sheng ZHAO, zhaots@nxu.edu.cn
Received Date: 19 May 2021
Revised Date: 23 June 2021

Figures(11)

H-[B,Al]-ZSM-5 zeolites were synthesized with glucose as assistant template to catalyze methanol converting toward propylene. The superior catalytic performance in terms of the propylene selectivity and the activity longevity was related to high ratio of weak acid to strong acid for favorable production of propylene and to high mesoporosity for improved diffusion of reactants and prevention from fast coking. More framework Al siting in the straight or sinusoidal channels of the MFI zeolite could also enhance the propylene/ethylene ratio due to the promotional effect on propylene formation. Low weak acid density was conducive to the production of high propylene/ethylene ratio. With the B/Al ratio of 2 and the (Al₂+B₂)/Si ratio of 0.01, HZ5-G-2B was applied in the methanol to propylene reaction at CH₃OH/H₂O (1∶1.2) WHSV of 1.8 h⁻¹ and 480 °C. Propylene selectivity of 51.6%, the \begin{document}${\rm{C}}_{{2-4}}^ {=} $\end{document} selectivity of 83.7% and complete conversion of methanol were achieved. The propylene/ethylene ratio was 2. The catalytic activity kept stable for 580 h.
- H-[B,
- Al]-ZSM-5,
- weak acidity,
- mesoporosity,
- MTP
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沈阳化工大学材料科学与工程学院沈阳 110142