Open AccessStructural Changes of Mo/ZSM-5 Catalysts During the Methane Dehydroaromatization
Author(s) -
З. Р. Исмагилов,
Е. В. Матус,
И.З. Исмагилов,
М. А. Керженцев,
V.I. Zailovskii,
К. Досумов,
А. Г. Мустафин
Publication year - 2009
Publication title -
eurasian chemico-technological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 9
eISSN - 2522-4867
pISSN - 1562-3920
DOI - 10.18321/ectj20
Subject(s) - zeolite , catalysis , mesoporous material , zsm 5 , methane , chemistry , adsorption , nuclear chemistry , inorganic chemistry , molecular sieve , materials science , chemical engineering , organic chemistry , engineering
The structure changes of Mo/ZSM-5 catalysts with different Mo content (2 and 10 wt. % Mo) and Si/Al atomic ratio (17, 30 and 45) during the methane dehydroaromatization have been investigated by X-ray powder diffractometry, N 2 adsorption and transmission electron microscopy. The treatment of Mo/ZSM-5 catalysts in reducing atmosphere (CH 4 or H 2 ) at about 700 °C promotes development of mesoporous system. The pores are open to the exterior of the zeolite grain and have an entrance diameter of ~ 4-10 nm. It is proposed that mesopore formation in Mo/ZSM-5 catalyst is connected with the dealumination of zeolite. The mesopore formation in the parent H-ZSM-5 zeolite by NaOH treatment does not improve the activity of /ZSM-5 catalyst.