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The FCC naphtha selective hydrodesulfurization technology(RSDS-II)has been tested with different feedstocks in pilot scale.The results show that RSDS-II technology is viable in terms of its adaptability to different feedstocks.To produce gasoline with a sulfur content of less than 50μg/g by the RSDS-II technology,the gasoline RON loss is less than 1.8,0.9and 0.2 units,respectively,upon processing the conventional high-sulfur and high-olefin FCC naphtha,the high-sulfur MIP naphtha,and the medium-sulfur or low-sulfur MIP naphtha.Upon using the naphtha produced from pre-hydrotreated FCC feedstock as the RSDS-II feedstock to manufacture gasoline with a sulfur content of lower than 10μg/g,the RON loss does not exceed 1.0 unit.The RSDS-II technology has been commercialized successfully at many refineries.The result of operating commercial RSDS-II unit at the Shanghai Petrochemical Company has revealed that upon processing a feedstock containing 38.7 v% —43.3 v% of olefins and 250—470 mg/g of sulfur,the sulfur content in the treated gasoline ranges from 33μg/g to 46μg/g and the RON loss is equal to only 0.3—0.6 units.Till now this RSDS-II unit has been operating smoothly over 30 months.Thanks to its high HDS activity and good selectivity,the RSDS-II technology can meet the refinery’s needs for adequate upgrading of gasoline.
The FCC naphtha selective hydrodesulfurization technology (RSDS-II) has been tested with different feedstocks in pilot scale.The results show that RSDS-II technology is viable in terms of its adaptability to different feedstocks.To produce gasoline with a sulfur content of less than than 50 μg / g by the RSDS-II technology, the gasoline RON loss is less than 1.8, 0.9 and 0.2 units, respectively, upon processing the conventional high-sulfur and high-olefin FCC naphtha, the high-sulfur MIP naphtha, and the medium -sulfur or low-sulfur MIP naphtha.Upon using the naphtha produced from pre-hydrotreated FCC feedstock as the RSDS-II feedstock to manufacture gasoline with a sulfur content of lower than 10 μg / g, the RON loss does not exceed 1.0 unit. RSDS-II technology has been commercialized successfully at many refineries. The result of operating commercial RSDS-II unit at the Shanghai Petrochemical Company has been that that processing feed stock containing 38.7 v% -43.3 v% of olefins and 250-470 m g / g of sulfur, the sulfur content in the treated gasoline ranges from 33 μg / g to 46 μg / g and the RON loss is equal to only 0.3-0.6 units.Till now this RSDS-II unit has been operating smoothly over 30 months. Thanks to its high HDS activity and good selectivity, the RSDS-II technology can meet the refinery’s needs for adequate upgrading of gasoline.