Hits:

Indexed by:期刊论文

Date of Publication:2014-01-05

Journal:CATALYSIS COMMUNICATIONS

Included Journals:SCIE、EI

Volume:43

Page Number:218-222

ISSN No.:1566-7367

Key Words:MCM-22 zeolite; Nanocrystals; Methane dehydro-aromatization; Mo/HMCM-22-NZ; Durability of catalyst

Abstract:A novel and facile synthesis method based on the combination of self-assembly and in-situ crystallization is developed for the preparation of nanosized MCM-22 zeolites (simplified as MCM-22-NZ hereafter) of about 40 nm, where the cationic polymer, PDDA, was added to play a role of protecting agent to avoid the synthesis colloids self-aggregation. MCM-22-NZ was characterized by XRD, TEM, DLS, NH3-TPD, XRF, TG and N-2 adsorption analysis. The catalytic activity of MCM-22-NZ in methane dehydro-aromatization (MDA) reaction was also studied. Mo/HMCM-22-NZ showed better methane conversion, higher benzene yield and more considerable durability of the catalyst as compared to the conventional microsized catalyst. (C) 2013 Elsevier B.V. All rights reserved.