Elucidating the roles of acid site on benzene production from methane dehydroaromatization over the supported Mo catalysts

Abstract

Benzene production from methane dehydroaromatization (MDA) reaction is suffered by the low benzene yield and severe carbon deposition. In this work, the supported Mo/ZSM-5 catalysts were synthesized and the acid site was successfully regulated by Ga promoter. Benzene production was increased by adjusting the ratio of Brønsted acid to Lewis acid on ZSM-5. The Mo/ZSM-5 catalyst with 0.7 wt% of Ga showed the highest B/L acid of 1.2, which exhibited the highest benzene yield of 12.8% at 700 °C. The moderate amount of B acid enhanced the yield of benzene and suppressed the formation of carbon deposition effectively.