Sulfur Removal of FCC Gasoline by Selective Adsorption over Activated Semi-coke

摘要

The objective of this research is to use semi-cokes as the raw material to prepare sorbents of sulfur removal from gasoline and to find the optimal preparation methods and to determine operating conditions. The result shows that the granular semi-cokes, pre-activated with 30%-45% HNO3, then calcined at 700°C at N2 atmosphere mixed with vapor for 1h, then impregnated with 3%CuO, has the best performance for sulfur removal.With this desulfurizer, the adsorption capacity observed was 0.933mg/g at breakthrough level for a high sulfur thiophene-cyclohexane solution (300ng/μ). Compared with the GC-FPD chromatograms of FCC gasoline and desulfurized gasoline, it showed that, all of the benzothiophenes (BT) and its derivatives and most other sulfides in FCC gasoline were removed by this desulfurizer. In this study, the optimal operating conditions were at 160°C,with the space velocity 4h -1 .