关键词: 高干点原料, 中间馏分油, 加氢裂化, 催化剂, Y-β复合分子筛

Abstract: In order to deal with the heavy and inferior hydrocracking feedstock, taking Iranian VGO and Tianjin Petrochemical VGO with high dry point as feedstock respectively, the Y zeolite and β zeolite of hydrocracking catalyst suitable for producing more middle distillate from high dry point feedstock are determined through experiments, and the optimal relative content of the two is determined. The catalyst Yβ_cat is prepared with Y-β composite zeolite as the main acidic component and tungsten-nickel as the hydrogenation phase. When the reaction conditions are the same and the conversion is similar, experiments are carried out with the above two feedstock respectively. The results show that, compared with the hydrocracking catalyst with pure Y zeolite as the main acidic component, the reaction temperature of catalyst Yβ_cat is lower, the selectivity to the middle distillate is about 1 percentage point higher, the quality of jet fuel and diesel products is good, and BMCI of tail oil is low. Yβ_cat composite zeolite catalyst is a promising hydrocracking catalyst with excellent performance and high stability, which is suitable for more middle distillate from high dry point feedstock.

Key words: high dry point feedstock, middle distillate, hydrocracking, catalyst, Y-β composite zeolite