Mesoporous HZn-ZSM-5 was prepared by incorporating Zn atoms in HZSM-5 framework followed by an alkali-treatment process, and was used subsequently as  methanol to aromatics (MTA) catalysts .When methanol was converted completely at 400oC, WHSV=2.5 h-1 and 1 atm, the yield of aromatics increased from 41.39% for HZSM-5 to 55.30% for mesoporous HZn-ZSM-5, which gave a high space time yield of 0.62 g�gcat-1�h-1. In addition, the lifetime of mesoporous HZn-ZSM-5 increased to as long as 120 h. The high BET specific surface area of 551 m2/g, high pore volume of 0.51 cm3/g together with the suitable amount and strength of acid sites for mesoporous HZn-ZSM-5 may be responsible for the improved MTA catalytic performance. After regeneration, the catalyst remained similar methanol conversion, while the initial yield of aromatics decreased a little, which maybe caused by the loss of the Br�nsted acid sites during regeneration process.

Mesoporous HZn-ZSM-5 for methanol to aromatics with high yield and high stability

244th National Meeting (2012)

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