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.
Recommended Citation
X. Li et al., "Synthesis of SAPO-34@ZSM-5 and SAPO-34@Silicalite-1 Core-Shell Zeolite Composites for Ethanol Dehydration," Industrial & Engineering Chemistry Research, vol. 57, no. 5, pp. 1446 - 1453, American Chemical Society (ACS), Feb 2018.
The definitive version is available at https://doi.org/10.1021/acs.iecr.7b05075
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.
Publication Date
01 Feb 2018
