Sustainable Synthesis of Core-Shell Structured ZSM-5@Silicalite-1 Zeolite

doi:10.1007/s40242-021-1288-y

Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (1): 136-140.doi: 10.1007/s40242-021-1288-y

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Sustainable Synthesis of Core-Shell Structured ZSM-5@Silicalite-1 Zeolite

LUAN Huimin¹, WU Qinming², ZHANG Jian³, WANG Yeqing¹, MENG Xiangju¹, XIAO Feng-Shou²

1. Key Laboratory of Applied Chemistry of Zhejiang Province, Zhejiang University, Hangzhou 310028, P. R. China;
2. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China;
3. Beijing Advanced Innovation Center for Soft Matter, Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Received:2021-07-29 Revised:2021-09-09 Online:2022-02-01 Published:2022-01-20
Contact: WU Qinming, XIAO Feng-Shou E-mail:qinmingwu@zju.edu.cn；fsxiao@zju.edu.cn
Supported by:
This work was supported by the National Key Research and Development Program of China(No.2017YFB0702803), the Fundamental Research Funds for the Central Universities, China(No.2021QNA4028), and the National Natural Science Foundation of China(Nos.21802121, 2217020097, 21720102001).

Abstract

Abstract: Core-shell structured ZSM-5@Silicalite-1 zeolite could effectively hinder the deactivation of catalyst surface. Currently, organic structure directing agents(OSDAs) are necessary in the conventional route for the synthesis of this core-shell zeolite under hydrothermal conditions, which is costly and environmental-unfriendly. In this research, a synthesis of the core-shell structured ZSM-5@Silicalite-1 zeolite with a strategy of alcohol filling and zeolite seeding without any organic template or solvent is exhibited. The obtained products are well characterized by X-ray powder diffractometer(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), N₂ sorption isotherms, solid magic angle spinning(MAS) NMR, temperature-programmed-desorption of ammonia(NH₃-TPD), and X-ray photoelectron spectroscopy(XPS) techniques, in order to confirm the core-shell structure. More importantly, the core-shell structured ZSM-5@Silicalite-1 zeolite exhibits a long lifetime and a high p-xylene selectivity in the alkylation of toluene with methanol, compared with the conventional ZSM-5 catalyst.

LUAN Huimin, WU Qinming, ZHANG Jian, WANG Yeqing, MENG Xiangju, XIAO Feng-Shou. Sustainable Synthesis of Core-Shell Structured ZSM-5@Silicalite-1 Zeolite[J]. Chemical Research in Chinese Universities, 2022, 38(1): 136-140.

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Sustainable Synthesis of Core-Shell Structured ZSM-5@Silicalite-1 Zeolite

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