Title

Synthesis of SAPO-34@ZSM-5 and SAPO-34@Silicalite-1 Core-Shell Zeolite Composites for Ethanol Dehydration

Abstract

Herein, we report the synthesis of zeolite composites with core-shell structure via a secondary growth technique and evaluation of their catalytic performance in ethanol dehydration. In particular, SAPO-34 particles were functionalized by TPA+, followed by dispersion in ZMS-5 or silicalite-1 to form SAPO-34@ZSM-5 and SAPO-34@silicalite-1 core-shell materials showed a hierarchical porous structure consisting of both micropores and mesopores. The active sites in the developed composites were found to have a mild acidity. Compared to conventional zeolite catalysts in ethanol dehydration reaction, the silicalite-1 composites. The novel core-shell materials showed a hierarchical porous structure consisting of both micropores and mesopores. The active sites in the developed composites were found to have a mild acidity. Compared to conventional zeolite catalysts in ethanol dehydration reaction, the core-shell SAPO-34@ZSM-5 improved the selectivity toward light olefins. In addition, our catalyst test results revealed the enhancement in propylene and ethylene yield over SAPO-34@ZSM-5 and SAPO-34@siliclite-1, respectively, as compared to that of bare SAPO-34. An improved catalyst stability was also obtained for the composite materials owing to their core-shell structure. The improved catalytic performance reported in this study reveals the potential utility of the zeolite composites with core-shell structure in ethanol dehydration reaction.

Department(s)

Chemical and Biochemical Engineering

Keywords and Phrases

Catalyst Selectivity; Catalysts; Dehydration; Dispersions; Ethanol; Ethylene; Microporosity; Porosity; Silicate Minerals; Zeolites; Catalyst Stability; Catalytic Performance; Conventional Zeolites; Core Shell Structure; Core-Shell Materials; Ethanol Dehydration; Hierarchical Porous Structures; Potential Utility; Shells (Structures)

International Standard Serial Number (ISSN)

0888-5885

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 American Chemical Society (ACS), All rights reserved.

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