Effect of alkali modification to ZSM-5 zeolite on the aromatization of methanol

LI Jun-hua; XIE Jin-yin; ZHANG Dan; LIU Lin; XING Jin-juan

doi:10.1016/S1872-5813(21)60016-6

Volume 49 Issue 3

Mar. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(3): 338-345

LI Jun-hua, XIE Jin-yin, ZHANG Dan, LIU Lin, XING Jin-juan. Effect of alkali modification to ZSM-5 zeolite on the aromatization of methanol[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 338-345. doi: 10.1016/S1872-5813(21)60016-6

Citation:

LI Jun-hua, XIE Jin-yin, ZHANG Dan, LIU Lin, XING Jin-juan. Effect of alkali modification to ZSM-5 zeolite on the aromatization of methanol[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 338-345. doi: 10.1016/S1872-5813(21)60016-6

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Effect of alkali modification to ZSM-5 zeolite on the aromatization of methanol

doi: 10.1016/S1872-5813(21)60016-6

1.
School of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China
2.
School of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China

Funds: The project was supported by the National Natural Science Foundation of China (21606117) and Innovation Team Project of Liaoning Province (2018-479-14, LT2015001)

Received Date: 2020-10-09
Rev Recd Date: 2020-11-23

Available Online: 2021-03-19

Publish Date: 2021-03-19

Abstract

Abstract

ZSM-5 zeolites were modified by desilication with sodium acetate and sodium citrate. The physicochemical properties of ZSM-5 zeolites, such as crystal structure, acid content, surface area and pore volume, were characterized by XRD, SEM, NH₃-TPD, ²⁷Al MAS NMR, pyridine adsorption infrared spectroscopy and N₂ adsorption-desorption isotherms. The results indicate that pore size of the zeolite increases and mesoporous structures are formed by alkali modification, and the amount of Lewis and Brönsted acid contents decreases obviously. When the concentration of sodium acetate solution is 0.5 mol/L, the modified zeolite has a suitable B/L value for the aromatization of methanol while forming a large number of mesoporous structures. Compared with microporous ZSM-5, the catalyst life is increased from 20 h to 74 h, and the highest yield of aromatics is increased from 20.97% to 40.05%.
- ZSM-5 zeolite,
- alkali modified,
- mesoporous,
- aromatization of methanol

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References(43)

References

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