Zn/H-ZSM-5催化剂上的二甲醚芳构化反应

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

考察了H-ZSM-5和Zn/H-ZSM-5催化剂的二甲醚芳构化性能.结果表明,H-ZSM-5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.当在H-ZSM-5催化剂中加入2%Zn时,在360oC下反应时总芳烃收率从50.0%增加至66.2%,C8芳烃收率从28.6%增加到39.0%.反应温度升高到480oC时,总芳烃收率增加至78.0%.

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 oC 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 oC, the total aromatics yield increased to 78.0% over Zn/H-ZSM-5.