USY分子筛催化噻吩烷基化性能的研究

Study on catalytic behavior of USY zeolite in thiophene alkylation

以模拟汽油为原料,在小型固定床反应装置上,对4种硅铝比不同的USY型分子筛催化噻吩烷基化反应性能进行了评价。结果表明,硅铝摩尔比为11.15的USY 1分子筛具有较为适中的B酸量和L酸量,其总B,总L,强B,强L酸量分别为616.5,170.9,589.1,120.0μmol/g,USY 1分子筛催化噻吩烷基化的活性和稳定性明显优于其他3种USY分子筛。USY 1分子筛催化噻吩烷基化的最佳工艺条件为:反应温度140℃、反应压力0.4 MPa、模拟汽油质量空速3 h-1。在此优化条件下,模拟汽油的噻吩转化率达89.28%,催化剂的使用寿命为35 h。

The catalytic behavior of 4 zeolites with different Si/A1 mole ratios in thiophene alkylation was evaluated with simulated gasoline as raw material in a bench scale fixed bed reactor. The results showed that the USY 1 zeolite with Si/A1 mole ratio of 11.15 had moderate B acid and L acid sites,in which acid sites of B acid and L acid and the acid sites of strong B and L acid were 616.5,170.9,589.1 and 120.0 μmol/g. The activity and stability of USY 1 zeolite catalyst in thiophene alkylation were obviously superior to those of the other 3 types of USY zeolite. The optimum conditions for USY 1 zeolite catalyst was： reaction temperature 140 ℃, reaction pressure 0.4 MPa, the mass space velocity of simulated gasoline 3 h-1. Under this condition, the thiophene conversion in simulated gasoline reached 89.28%, and the service life of the catalyst was 35 h.