Non-oxidative methane conversion into aromatics on mechanically mixed Mo/HZSM-5 catalysts

Abstract

The catalyst prepared by the physical mixing of powder MoO3 and HZSM-5 exhibits a better performance for methane conversion at high Mo loading compared with those prepared by the impregnation method. The specific surface area is larger for physically mixed samples than that for impregnated samples with the same Mo loading. The preferential orientation of MoO3 crystallite is along the (0 K 0) axis, while the (0 2 1) plane is exposed preferentially by MoO3 to impregnated HZSM-5. Both hep β-Mo2C and fee α-Mo2C can be formed on physically mixed samples, while only hep β-Mo2C is found on the impregnated samples under the same reaction condition. © 2001 Elsevier Science B.V. All rights reserved.