Abstract: The effects of the reaction temperature, hydrocarbon base mass space velocity, and the feed molar ratio of methanol to n-pentane on the co-aromatization performance were systematically investigated in a fixed bed micro-reactor with ZSM-5 molecular sieve modified by ZnO as the catalyst. The results showed that the co-aromatization of n-pentane and methanol significantly improved the selectivity of aromatics and inhibited the formation of dry gas, the conversion rate of n-pentane decreased with the increase of the molar ratio of methanol to n-pentane. The optimum reaction conditions for the co-aromatization of n-pentane and methanol on ZSM-5 molecular sieve covered a temperature of 475 ℃, a hydrocarbon base mass space velocity of 2 h^-1, and a molar ratio of methanol to n-pentane of 3:1. The selectivity of aromatics in the co-aromatization of n-pentane with methanol was 31.68% at the optimum reaction conditions.

Key words: n-pentane, methanol, aromatization, catalyst, zinc oxide, ZSM-5 molecular sieve