Hierarchical mesoporous ZSM-5 for the dehydration of methanol to dimethyl ether

作者：Yang, Qi; Zhang, Haitao; Kong, Meng; Bao, Xiuxiu; Fei, Jinhua^*; Zheng, Xiaoming

来源：Chinese Journal of Catalysis, 2013, 34(8): 1576-1582.

DOI：10.1016/S1872-2067(12)60621-4

• Hierarchical mesopore
• HZSM-5 zeolite
• Surface acidity
• Methanol dehydration
• Dimethyl ether

Hierarchical mesoporous ZSM-5 zeolites were synthesized using small organic cations of tetrapropylammonium and meso-sized cationic polymers of dimethyldiallyl ammonium chloride acrylamide copolymer as templates. The zeolites were used for the dehydration of methanol to dimethyl ether (DME). Characterization results showed that the basic MFI-type structure was still obtained after adding the cationic polymers, while their nitrogen isotherms exhibited a broad hysteresis loop at relative pressures higher than 0.4, which proved the presence of mesopores. The mesoporosity of the hierarchical mesoporous ZSM-5 can be adjusted simply by adding different amounts of the cationic polymer. Catalytic tests showed that the hierarchical mesoporous HZSM-5 zeolites exhibited better stability than conventional HZSM-5 and excellent DME selectivity. The activity for methanol dehydration strongly depended on the textural property and acidity of the catalyst.

• 出版日期2013-8
• 单位浙江大学