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2003•Dalian Institute of Chemical Physics, CAS Institutional RepositoryRequires access

Effect of HZSM-5 zeolite properties on dehydro-aromatization of methane over Mo/HZSM-5 catalyst

LL Su, H Zhang, Xuesen Wang, JQ Zhuang, YD Xu, Xinhe Bao

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Abstract

The effects of particle size of HZSM-5 zeolite and silicon sources for preparation of HZSM-5 on the reaction performance of methane dehydro-aromatization over Mo/HZSM-5 catalyst were studied by changing the synthesis conditions and systems. The results showed that the catalytic performance of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via soluble water-glass was better than that of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via silica sol. H-1 MAS NMR measurements revealed that the amount of Bronsted acid sites in the former is more than that in the latter. In addition, by using the HZSM-5 zeolite with smaller particle size, the corresponding Mo/HZSM-5 catalyst shows better catalytic stability.

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What this paper is about

The effects of particle size of HZSM-5 zeolite and silicon sources for preparation of HZSM-5 on the reaction performance of methane dehydro-aromatization over Mo/HZSM-5 catalyst were studied by changing the synthesis conditions and systems. The results showed that the catalytic performance of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via soluble water-glass was better than that of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via silica sol. H-1 MAS NMR measurements revealed that the amount of Bronsted acid sites in the former is more than that in the latter. In addition, by using the HZSM-5 zeolite with smaller particle size, the corresponding Mo/HZSM-5 catalyst shows better catalytic stability.

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Available abstract

The effects of particle size of HZSM-5 zeolite and silicon sources for preparation of HZSM-5 on the reaction performance of methane dehydro-aromatization over Mo/HZSM-5 catalyst were studied by changing the synthesis conditions and systems. The results showed that the catalytic performance of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via soluble water-glass was better than that of Mo/HZSM-5 catalyst in which the HZSM-5 was synthesized via silica sol. H-1 MAS NMR measurements revealed that the amount of Bronsted acid sites in the former is more than that in the latter. In addition, by using the HZSM-5 zeolite with smaller particle size, the corresponding Mo/HZSM-5 catalyst shows better catalytic stability.

Key concepts: Aromatization, Catalysis, Zeolite, Methane, Particle size, Brønsted–Lowry acid–base theory, Chemistry, Molecular sieve

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Effect of HZSM-5 zeolite properties on dehydro-aromatization of methane over Mo/HZSM-5 catalyst — Research Paper | ScholarLens