采用等体积浸渍法在HZSM-5分子筛上引入Ga2O3，探究Ga改性HZSM-5分子筛对2-甲基呋喃（MF）和甲醇在固定床反应器中进行偶合反应的产物分布的影响。采用XRD、HTEM、BET和NH3-TPD对催化剂的理化性质进行表征，结果显示，Ga的负载使得HZSM-5比表面积和孔容减小，改变了HZSM-5的酸类型及酸位强度分布。偶合反应结果表明，Ga的负载能够促进MF和甲醇的转化，Ga/HZSM-5不仅可以提高芳香烃的产率，而且提高了芳香烃产物中BTX的选择性。与HZSM-5相比，0.1%Ga/HZSM-5在反应温度为500℃、MF与甲醇摩尔比为1∶2、WHSV为2 h−1反应条件下，使芳香烃产率从14.6%提高到23.7%，而BTX的选择性则从55.2%提高到67.8%。
Ga2O3 was introduced on HZSM-5 zeolite by incipient impregnation to study the product distribution of the coupling reaction of 2-methylfuran (MF) and methanol on fixed bed. The physicochemical properties of the catalysts were characterized by XRD, HTEM, BET and NH3-TPD. Results showed that specific surface area and pore volume of the zeolite with Ga were reduced, and the acid type and distribution of acid sites were changed. Coupling reaction results showed that the introduction of Ga could increase the conversion of MF and methanol. The yield of aromatic hydrocarbons and the selectivity of BTX both increased over Ga/HZSM-5 catalyst. Compared with HZSM-5, the yield of aromatic hydrocarbons increased from 14.6% to 23.7%, simultaneously, BTX selectivity increased from 55.2% to 67.8% over 0.1%Ga/HZSM-5 catalyst with the mole ratio of MF to methanol was 1:2, and WHSV was 2 h−1 at 500oC.
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