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Nano‐MoO 3 ‐modified MCM‐22 for methane dehydroaromatization
Author(s) -
Hu Jing,
Wu Shujie,
Li Zhifang,
Peng Ling,
Fu Xiaoran,
Wang Xiufang,
Guan Jingqi,
Kan Qiubin
Publication year - 2015
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3345
Subject(s) - chemistry , catalysis , adsorption , methane , thermogravimetric analysis , desorption , x ray photoelectron spectroscopy , aromatization , pyridine , infrared spectroscopy , inorganic chemistry , nuclear chemistry , chemical engineering , organic chemistry , engineering
The work reported was aimed at a simple method to improve the catalytic activity of Mo/HMCM‐22 in methane aromatization . The catalysts were characterized using X‐ray diffraction, scanning electron microscopy , N 2 adsorption–desorption, NH 3 temperature‐programmed desorption, infrared spectra of pyridine adsorption, X‐ray photoelectron spectroscopy and thermogravimetric analysis. Physicochemical measurements indicated that Mo species with smaller size in HMCM‐22 would sublimate more easily and form Mo species at the atomic/molecular level and then interact well with the internal Brønsted acid sites to form Mo–O–Al active species. Catalytic results confirmed that nano‐MoO 3 ‐modified HMCM‐22 showed higher methane conversion and aromatics yield (13.1 versus 8.9%) than commercial MoO 3 ‐modified HMCM‐22 (11.0 versus 7.5%). In addition, nano‐MoO 3 ‐modified HMCM‐22 showed better durability compared with commercial MoO 3 ‐modified MCM‐22. Copyright © 2015 John Wiley & Sons, Ltd.