关键词: 催化裂化汽油, 反应吸附脱硫, 芳构化, 辛烷值

Abstract: In the process of fluid catalytic cracking(FCC) gasoline deep desulfurization,olefin saturation exists inthe traditional Ni/ZnO adsorbent, which results in the loss of octane number.In order to solve this problem, reactive adsorptive desulfurization coupling olefin aromatization reaction was attempted by introducing Zn-ZSM-5 into Ni/ZnO component.Bifunctional coupled Ni/ZnO-Zn/ZSM-5 catalyst was prepared by the equal volume impregnation method, the performances of coupling catalysts for desulfurization and olefin aromatization were evaluated, andthe effects of Ni content and Ni partition ratio on ZnO and Zn/ZSM-5 were investigated. The results showed that the catalyst hadthe best catalyticperformance at a reaction temperature of 450 ℃when the mass fraction of Ni content was 6% and theratio of NitoZnO and Zn/ZSM-5 was 1:1.The aromatics generation rate of 38.58% and the liquid yieldrate of 88.33%could be achieved.The operating temperature of the process was optimized and the regeneration performance of the catalyst was examined. At 420 ℃,the desulphurization rate, olefin conversion rate andaromatics generation rate of 6% Ni/ZnO-Zn/ZSM-5(1:1) catalyst were 98.7%, 54.0% and 29.7%, respectively, and the loss of octane number was reduced by 0.69 compared with that of the conventional Ni/ZnO desulphurization reaction. In addition, the process exhibited excellent desulfurization and aromatization performance in multiple regeneration cycles, demonstrating the feasibility of continuous processing.

Key words: FCC gasoline, reactive adsorptive desulfurization, aromatization, octane number