Preparation of core-shell ZSM-5@Beta molecular sieve and catalytic alkylation to 2,6-dimethylnaphthalene

SHENG Lu-yang; ZHAN Jun-ling; ZHANG Xu-peng; WU Bang-hao; ZHANG Yu; ZHANG Ji-bo

doi:10.1016/S1872-5813(22)60014-8

Volume 50 Issue 9

Oct. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(9): 1202-1210

SHENG Lu-yang, ZHAN Jun-ling, ZHANG Xu-peng, WU Bang-hao, ZHANG Yu, ZHANG Ji-bo. Preparation of core-shell ZSM-5@Beta molecular sieve and catalytic alkylation to 2,6-dimethylnaphthalene[J]. Journal of Fuel Chemistry and Technology, 2022, 50(9): 1202-1210. doi: 10.1016/S1872-5813(22)60014-8

Citation:

SHENG Lu-yang, ZHAN Jun-ling, ZHANG Xu-peng, WU Bang-hao, ZHANG Yu, ZHANG Ji-bo. Preparation of core-shell ZSM-5@Beta molecular sieve and catalytic alkylation to 2,6-dimethylnaphthalene[J]. Journal of Fuel Chemistry and Technology, 2022, 50(9): 1202-1210. doi: 10.1016/S1872-5813(22)60014-8

Citation:

SHENG Lu-yang, ZHAN Jun-ling, ZHANG Xu-peng, WU Bang-hao, ZHANG Yu, ZHANG Ji-bo. Preparation of core-shell ZSM-5@Beta molecular sieve and catalytic alkylation to 2,6-dimethylnaphthalene[J]. Journal of Fuel Chemistry and Technology, 2022, 50(9): 1202-1210. doi: 10.1016/S1872-5813(22)60014-8

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Preparation of core-shell ZSM-5@Beta molecular sieve and catalytic alkylation to 2,6-dimethylnaphthalene

doi: 10.1016/S1872-5813(22)60014-8

SHENG Lu-yang^1
,,
ZHAN Jun-ling^{1, 2},
ZHANG Xu-peng¹,
WU Bang-hao¹,
ZHANG Yu^{1
,
,},
ZHANG Ji-bo^{1
,
,}

1.
Jilin Institute of Chemical Technology, School of Petrochemical Engineering, Jilin 132022, China
2.
Jilin University, College of Chemistry, Changchun 130021, China

Funds: The project was supported by the Science and Technology Development Foundation of Jilin Province (20200401029GX).

More Information

Corresponding author: Tel: 0432-62185139, E-mail: zhang99yu@hotmail.com (ZHANG Yu); Tel: 0432-62185139, E-mail: zhangjb69@163.com (ZHANG Ji-bo)
Received Date: 2022-02-16
Rev Recd Date: 2022-03-21

Available Online: 2022-04-22

Publish Date: 2022-10-21

Abstract

Abstract

ZSM-5@Beta core-shell molecular sieve was prepared by dynamic hydrothermal synthesis method using ZSM-5 adhered Beta seed crystals as the core phase, and polydiallyl dimethyl ammonium chloride (PDDA) was used as a coupling agent to adhere Beta seed crystals on the surface of ZSM-5. The structure and physical properties of composite molecular sieves were characterized by XRD, N₂ adsorption-desorption, SEM, TEM, ICP, NH₃-TPD and Py-FTIR. The catalytic performance of composite molecular sieves for alkylation of 2-methylnaphthalene (2-MN) with methanol was investigated. The results showed that ZSM-5@Beta composite molecular sieve prepared by this method had a core-shell structure, and the particle size was about 500 nm. Compared with mechanically mixed binary molecular sieve, core-shell molecular sieve had higher specific surface area and external surface area, lower acid strength and stronger acid center density. Through the construction of core-shell interface and hierarchical porous, the catalytic activity was improved by shell phase Beta molecular sieve with 12-membered ring channel, and the catalytic selectivity was improved by core phase ZSM-5 molecular sieve with 10-membered ring channel in the alkylation reaction of 2-MN with methanol. The 2,6-/2,7-DMN ratio in the products reached 1.35, and the yield of 2,6-DMN reached 4.29%.
- ZSM-5,
- Beta,
- core-shell structure,
- 2,6-dimethylnaphthalene

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References(30)

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