不同载体成型的ZSM-5催化剂上甲醇芳构化反应性能

以ZSM-5分子筛为活性组分，采用不同的氧化物载体挤条制备催化剂，并对催化剂的甲醇芳构化反应性能进行评价。采用X射线衍射、氨程序升温脱附和N₂低温吸附-脱附等方法对催化剂进行表征。结果表明，添加氧化物载体后，催化剂的芳构化反应性能明显提高，催化剂芳构化反应性能与其酸性质有着密切联系，Zn/La-ZSM-5(Al₂O₃)催化剂的芳构化反应性能较好,主要归因于催化剂具有适宜的酸分布和孔结构。在反应压力0.1 MPa、空速0.8 h^-1、反应温度437 ℃和反应时间240 min条件下，轻质芳烃收率为42.36%.

Methanol aromatization over ZSM-5 catalysts prepared with different oxides

Using ZSM-5 molecular sieve as the active component,ZSM-5 catalysts prepared with different oxides were prepared. The performance of as-prepared catalysts for methanol aromatization was investigated The physicochemical properties of the catalysts were characterized by N2 adsorption-desorption, NH3 temperature-programmed desorption, and powder X-ray diffraction. The results showed that ZSM-5 catalysts prepared with the oxides possessed the better performance for methanol aromatization. There was close correlation between the catalytic performance for methanol aromatization and acidity properties of the catalysts. Zn/La-ZSM-5（Al2O3） catalyst exhibited better catalytic performance for methanol aromatization due to its appropriate acid distribution and pore structure. The aromatics yield of 42.36% was attained under the reaction condition as follows ： reaction pressure 0. 1 MPa, space velocity 0. 8 h^-1, reaction temperature 437 ℃, and reaction time 240 min.