Citation: Xingyang LI, Tianju LIU, Yang GAO, Dandan ZHANG, Yong ZHOU, Meng PAN. A superior methanol-to-propylene catalyst: Construction via synergistic regulation of pore structure and acidic property of high-silica ZSM-5 zeolite[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(7): 1279-1289. doi: 10.11862/CJIC.20240026 shu

A superior methanol-to-propylene catalyst: Construction via synergistic regulation of pore structure and acidic property of high-silica ZSM-5 zeolite

Xingyang LI ¹ ,
Tianju LIU ¹ ,
Yang GAO ¹ ,
Dandan ZHANG ¹ ,
Yong ZHOU ^{1, 2,,} ,
Meng PAN ^1,,

1.
School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
2.
Eco-materials and Renewable Energy Research Center, School of Physics, Nanjing University, Nanjing 210000, China

Corresponding author: Yong ZHOU, zhouyong1999@nju.edu.cn Meng PAN, panmeng@ahpu.edu.cn
Received Date: 19 January 2024
Revised Date: 19 April 2024

Figures(8)

Combined strategy of alkali treatment and chromium modification was used to synergistically regulate the pore structure and acidic property of the high-silica ZSM-5 zeolite. During the alkaline treatment, the abundant intergrowth boundaries constructed by adjusting the composition of the synthesis gel induced the formation of meso-pores. Thereby, the limitation of the conventional alkali treatment method coming from the framework Si/Al ratio of parent zeolite was circumvented. In the process of chromium modification, the unique hierarchical pore structure promoted the dispersion of chromium species in the catalyst. Thus, a deep modification of the acidic property was realized. As a result, a high-silica hierarchical zeolite catalyst with suitable acidities was obtained. During the catalytic conversion of methanol to propylene, the variation of the pore structure and acidic property caused obvious changes in the coke deposition behavior of the catalyst and the mass transfer of products. Consequently, the prepared catalyst exhibited excellent catalytic stability and a high selectivity towards propylene and total light olefins.
- methanol to propylene,
- hierarchical pore,
- acidity regulation,
- zeolite,
- catalytic performance
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