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

C ore-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 an...

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Bibliographic Details
Published in:Chemical research in Chinese universities 2022-02, Vol.38 (1), p.136-140
Main Authors: Luan, Huimin, Wu, Qinming, Zhang, Jian, Wang, Yeqing, Meng, Xiangju, Xiao, Feng-Shou
Format: Article
Language:English
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Summary:C ore-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), N 2 sorption isotherms, solid magic angle spinning(MAS) NMR, temperature-programmed-desorption of ammonia(NH 3 -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.
ISSN:1005-9040
2210-3171
DOI:10.1007/s40242-021-1288-y