Abstract
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, N2 adsorption–desorption, NH3 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‐MoO3‐modified HMCM‐22 showed higher methane conversion and aromatics yield (13.1 versus 8.9%) than commercial MoO3‐modified HMCM‐22 (11.0 versus 7.5%). In addition, nano‐MoO3‐modified HMCM‐22 showed better durability compared with commercial MoO3‐modified MCM‐22. Copyright © 2015 John Wiley & Sons, Ltd.
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