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Direct synthesis of Zn-incorporated nanosized H-ZSM-5 zeolites with ZIF-8 as template for enhanced catalytic performance

Abstract

Zn-incorporated nanosized H-ZSM-5 zeolites were synthesized by a novel and facile one-pot route using zeolitic imidazolate framework-8 (ZIF-8) as the template with steam-assisted conversion process. The prepared zeolites were characterized using various techniques including XRD, nitrogen adsorption-desorption, SEM, TEM, TGA, NH3-TPD, and pyridine-FT-IR. The crystallization time and ZIF-8 loading were extensively investigated to elucidate the crystallization mechanism, morphology, and structural characteristics of the prepared zeolites. The results show that the formation of Zn-incorporated nanosized H-ZSM-5 zeolites involves two stages: dissolution-impregnation and crystallization. The increased amount of ZIF-8 helps to increase the number of active metal Zn. Furthermore, the incorporation of ZIF-8 effectively facilitated the formation of Lewis acid sites and increased the acidity amount. Thus, the Zn-incorporated nanosized H-ZSM-5 zeolites showed a high catalytic activity and H2 yield as well as excellent catalytic stability when used in dimethyl ether steam reforming.

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Publication details

The article was received on 10 Mar 2017, accepted on 10 May 2017 and first published on 15 May 2017


Article type: Paper
DOI: 10.1039/C7CE00482F
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Direct synthesis of Zn-incorporated nanosized H-ZSM-5 zeolites with ZIF-8 as template for enhanced catalytic performance

    Y. Zang, X. Dong, D. Ping and C. Dong, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE00482F

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