Citation: ZHANG Hai-rong, LIU Hong-yan, PAN Qi-liang, LIU Hui-jun, SHEN La-zhen, CUI Yue, LIU Yi-ding, ZHANG Tao, JIANG Yu, GUO Yong. Modification of the acidic and textural properties of ZSM-5 zeolite by using double mineralizers in synthesis and its catalytic performance in the conversion of methanol to propene[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(8): 967-976. shu

Modification of the acidic and textural properties of ZSM-5 zeolite by using double mineralizers in synthesis and its catalytic performance in the conversion of methanol to propene

ZHANG Hai-rong ^1,2,, ,
LIU Hong-yan ^1,2,, ,
PAN Qi-liang ¹ ,
LIU Hui-jun ¹ ,
SHEN La-zhen ¹ ,
CUI Yue ¹ ,
LIU Yi-ding ¹ ,
ZHANG Tao ¹ ,
JIANG Yu ³ ,
GUO Yong ¹

1.
Shanxi Datong University, Datong 037009, China
2.
Taiyuan University of Technology, Taiyuan 030024, China
3.
Datong Coal Mine Group Co., LTD, Datong 037003, China

Corresponding author: ZHANG Hai-rong, 673839261@qq.com LIU Hong-yan, 409760354@qq.com
Received Date: 30 March 2018
Revised Date: 30 June 2018

Fund Project: the National Nature Science Foundation of China 21477069the Datong Science and Technology Public Relations Project 2015021the National Nature Science Foundation of China 21506120the Datong Science and Technology Public Relations Project 2018023University Students' Innovation and Entrepreneurship of Shanxi Datong University XDC2017257the National Nature Science Foundation of China 51303098the Doctoral Science Foundation of Shanxi Datong University QD201049Research Project Supported by Shanxi Scholarship Council of China 2016-104The project was supported by the National Nature Science Foundation of China (51303098, 21477069, 21506120), Research Project Supported by Shanxi Scholarship Council of China (2016-104), the Datong Science and Technology Public Relations Project (2015021, 2018023), the Doctoral Science Foundation of Shanxi Datong University (QD201049) and University Students' Innovation and Entrepreneurship of Shanxi Datong University (XDC2017257)

Figures(6)

A static hydrothermal approach was adopted to synthesize nanosized SiO₂-ZSM-5 zeolite in the media of F^--OH^- with double mineralizers, using tetraethoxysilane, sodium aluminate, and tetrapropylammonium hydroxide as the silicon source, aluminum source, and template agent, respectively. The physical and chemical properties of the synthesized ZSM-5 zeolites were characterized and their catalytic performance was evaluated in the conversion methanol to propene (MTP); the effect of F^-/Al₂O₃ molar ratio on the catalytic performance of synthesized H-ZSM-5 was investigated. The results indicate that an increase in the F^-/Al₂O₃ molar ratio of the synthesis mixture leads to an increase in the surface content of microcrystalline SiO₂, accompanying with a decrease in the relative crystallinity, surface area, pore volume, and acid strength and density. With a F^-/Al₂O₃ molar ratio of 12, the SiO₂-ZSM-5 zeolite exhibits the best catalytic performance in MTP, with a selectivity of 45% to propene and a propene/ethene (P/E) ratio of greater than 10. It is further hypothesized that the transition state shape selectivity plays an important role in determining the product selectivity in MTP.
- mineralizer,
- ZSM-5,
- methanol conversion,
- propene,
- ethene
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