Abstract: The application of DSO technology in 1.4 Mt/a gasoline hydrogenation unit of Yunnan refinery was introduced. The data showed that at the conditions of feed S content of 103μg/g, the processing load 102%, and mass ratio of light gasoline and heavy gasoline of 0.36:0.64, the final gasoline product has sulfur content of 11.4μg/g. Mercaptan sulfur content reduces from 18μg/g to less than 3μg/g. The RON loss of gasoline is 1.4, lower than the design value 1.7, the induction period increases from 168 min to 505 min. The energy consumption is 675 MJ/t, less than the design value 838 MJ/t. After 7 months of operation, the unit runs smoothly, the gasoline product can be used as the China VI standard gasoline blending component.

Key words: FCC gasoline, DSO, hydrodesulfurization, RON, induction period