论文部分内容阅读
It is necessary to produce low sulfur /low olefin gasoline and low sulfur /low aromatics diesel fuel for reducing the air pollution from automobile exhausted gas. Major component in gasoline pool in China is from FCCU, resulting in higher olefin content in product gasoline. The difficult point in producing clean gasoline is to lower down the olefin content while retaining RON of gasoline as much as possible. Based on the properties of gasoline, RIPP has developed technology (RIDOS) for reducing both sulfur and olefin contents by the same process. The technology shows that its hydro iso cracking performance to some extent can reduce the olefin content from 50%～60% to less than 20%, and road octane loss is less than 2. In deep hydro desulfurization of diesel fuel, the key point is to remove dibenzhothiophen (DBT) with methyl substitute in 4 and 6 positions. To solve this problem, RN 10 catalyst with high hydrogenation activity was developed by reinforcing the hydrogenation function. The catalyst featured with less spatial hindrance effect after the DMDBT was hydrogenated, meanwhile, it has high activity in aromatics saturation. Diesel fuel with low sulfur and low aromatics content can be manufactured from SRGO or FCC diesel fraction. RIPP has deve loped more technologies such as MHUG, RMC and RICH for production of clean diesel fuel with low sulfur/aromatics and low density with increased cetane number.