Abstract: According to the characteristics of FCC gas oil（FGO）, a special catalyst RDA-1 for FGO hydrogenation was developed and the optimum selective hydrogenation process (HAR) for FGO was studied. The industrial test of HAR was conducted in a 20 kt/a hydrogenation unit in a company of SINOPEC. The calibration results showed that the hydrogen content increased by more than 1.65 percentage points after FGO hydrogenation and the saturation rate of polycyclic aromatic hydrocarbons （PAHs）was up to 67.7%, and the cracking performance of FGO was greatly improved.

Key words: FCC gas oil, hydrogenation process, polycyclic aromatic hydrocarbons