Aromatization of Dimethyl Ether over Zn/H-ZSM-5 Catalyst

The catalytic behavior of H-ZSM-5 and Zn/H-ZSM-5 for the aromatization of dimethyl ether (DME) was investigated. The increase in the number and strength of acid sites on the H-ZSM-5 zeolite was beneficial for DME aromatization. Aromatization performance was enhanced by loading Zn into H-ZSM-5. The yields of total and C8 aromatics over H-ZSM-5 at 360 °C were 50.0% and 28.6%, respectively, and over Zn/H-ZSM-5 (Zn 2% in mass) were 66.2% and 39.0%, respectively. At 480 °C, the total aromatics yield increased to 78.0% over Zn/H-ZSM-5. 考察了䜕H-ZSM-5䜕和䜕Zn/H-ZSM-5䜕催化剂的二甲醚芳构化性能.䜕䜕结果表明,䜕H-ZSM-5䜕分子筛催化剂酸性的增强和酸中心的增多有利于二甲醚芳构化.䜕䜕当在䜕H-ZSM-5䜕催化剂中加入䜕2%䜕Zn䜕时,䜕在䜕䜕°C䜕下反应时总芳烃收率从䜕50.0%䜕增加至䜕66.2%,䜕C8䜕芳烃收率从䜕28.6%䜕增加到䜕39.0%.䜕䜕反应温度升高到䜕480䜕°C䜕时,䜕总芳烃收率增加至䜕78.0%.䜕