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Indexed by:期刊论文

Date of Publication:2010-02-20

Journal:CATALYSIS COMMUNICATIONS

Included Journals:SCIE、EI

Volume:11

Issue:6

Page Number:513-517

ISSN No.:1566-7367

Key Words:Hierarchical structure; Aggregates; Methane dehydroaromatization; Mo/HMCM-22-HA; Durability of catalyst

Abstract:A feasible route, preparing hierarchical structure zeolite (MCM-22 and ZSM-5) aggregates catalysts directly without using any secondary template, was presented to improve catalytic performance dramatically in methane clehydroaromatization reaction. The zeolites hierarchical aggregates possessed both mesopores and the inherent micropores, which was beneficial to the effective combination Mo species with zeolite acidic sites and giving rise to high quality bifunctional catalysts. Besides, mesopores provided easier access to the active sites for both reactant and larger product molecules. All these led to very high methane conversion and very strong coking-resistance and thus exceptional catalyst stability. (C) 2009 Elsevier B.V. All rights reserved.