轻烃与甲醇耦合芳构化研究

在反应温度400 ℃、反应压力0.50 MPa（N₂气氛）、质量空速1.0 h^-1、轻烃/甲醇质量比1∶1的条件下，研究了重整拔头油、芳烃抽余油（简称抽余油）和重整戊烷油（简称戊烷油）3种轻烃原料与甲醇耦合芳构化的反应规律。结果表明：3种轻烃原料分别与甲醇发生耦合芳构化反应，反应72 h，甲醇转化率为100%；戊烷油中异戊烷含量最高，当戊烷油与甲醇耦合芳构化反应时，芳烃收率为26.30%～35.13%；重整拔头油中异戊烷含量最低，当重整拔头油与甲醇耦合芳构化反应时，芳烃收率为24.81%～34.56%；反应过程中通过异构化、芳构化、环化和氢转移等方式生成了芳烃，大量的正构烷烃发生了反应；抽余油与甲醇耦合反应时，正戊烷转化率为97.19%，正己烷转化率为94.26%，芳烃质量分数明显升高，由原料中的1.56%提高至产物中的39.44%。

STUDY OF THE COUPLING AROMATIZATION OF LIGHT HYDROCARBONS WITH METHANOL

Under the conditions of a reaction temperature of 400 °C, a reaction pressure of 0.50 MPa (N² atmosphere) , a mass space velocity of 1.0 h^-1 and a light hydrocarbon/methanol mass ratio of 1∶1, the coupling aromatization of methanol with three light hydrocarbon feedstocks of reformer topped oil, aromatics raffinate oil and reformer pentane oil were studied. The results showed that the conversion of methanol was 100% within 72 hours. The content of isopentane in pentane oil was the highest and the yield of aromatics ranged from 26.30% to 35.13%, while the content of isopentane in the reformer topped oil was the lowest and the yield of aromatics ranged from 24.81% to 34.56% in the coupling aromatization of methanol with the reformer topped oil during the reaction. Aromatic hydrocarbons were produced by isomerization, aromatization, cyclization and hydrogen transfer, and a large number of n-alkanes reacted. When the raffinate oil reacted with methanol, the conversion of n-pentane was 97.19%, the conversion of n-hexane was 94.26% , and the mass fraction of aromatics was increased from 1.56% to 39.44% .