Abstract: The USY/ZnO/Al2O3 catalyst,prepared with impregnation and co-depositi on method,for gasoline desulfurization via catalytic cracking was evaluated in a fixed-bed reaction apparatus.The results show that the catalyst has excellent sulfur removal activity and selectivity (Table 1).Most of the sulfur removed fro m gasoline is transformed as H2S into the cracking gas and only a little deposit s on the catalyst (Fig.3),which is very favorable for sulfur recovery and protec ting the environment.Cracking desulfurization of sulfide is the result of synerg ism between cracking and hydrogen transfer.The two reactions require different a ppropriate temperatures.There is then an optimal temperature at around 420℃ for gasoline desulfurization.

Key words: Gasoline, Catalytic cracking, Desulfurization, USY/ZnO/Al₂O₃ Catalyst