Study on Bifunctionality of Mo／HZSM—5 Catalysts for Methane Dehydro—Aromatization under Non—oxidative Condition

The optimum Mo/H^ ] ratio per unit cell of the active precursors in Mo/HZSM-5 catalysts for methane dehydro-aromatization,measured by ^1H MAS NMR,was found to be about 1 when adjusting the acid sites by altering either the SiO2/Al2O3 ration or the Mo loading,This implies that a concerted interaction between the Mo species and the Broensted acid sites probably features the bifunctionality of the Mo/HZSM-5 catalyst,On the other hand,it was found that the driving force for Mo species to move into the HSZM-5 zeolite channels and the interaction between the Mo species and the Broensted acid sites are closely and proportionably realtaed with the amount of Broensted acid sites per unit cell.

Study on Bifunctionality of Mo/HZSM-5 Catalysts for Methane Dehydro-Aromatization

The optimum Mo/H+] ratio per unit cell of the active precursors in Mo/HZSM-5 catalystsfor methane dehydro-aromatization, measured by 1H MAS NMR, was found to be about 1 when adjustingthe acid sites by altering either the SiO2/Al2O3 ratios or the Mo loading. This implies that a concertedinteraction between the Mo species and the Bronsted acid sites probably features the bifunctionality of theMo/HZSM-5 catalyst. On the other hand, it was found that the driving force for Mo species to move intothe HSZM-5 zeolite channels and the interaction between the Mo species and the Bronsted acid sites areclosely and proportionably related with the amount of Bronsted acid sites per unit cell.