Study on the Deep Hydrodesulfurization of Sulfur-Containing Compound inFCC Diesel on FH-UDS Catalyst

The catalytic conversion performance of relative model sulfur-containing compounds in FCC diesel on FH-UDS catalyst are evaluated by gas chromato graphy-atomic emission detector (GC-AED) in a pilot plant.The results indicate that reaction temperature is the most sensitive factor which influences the hydrodesulfurization ratio of diesel fuels. The total conversion of sulfur-containing compounds of FCC diesel is 99.6%. Among the sulfur-containing compounds of FCC diesel, T and BT are completely converted, the conversions of 4-MDBT and 4, 6-DMDBT are 99.2% and 94.4% under the conditions of the reaction temperature 375℃, hydrogen partial pressure 6.0MPa, LHSV 2.0h^-1 and H₂/oil mole ratio 350.The sulfur content of the treated FCC diesel is less than 60μg/g or 10μg/g under the conditions of the reaction temperature 360℃, hydrogen partial pressure 8.0MPa, LHSV 1.5h^-1~1.0h^-1 and H₂/oil mol ratio 350.