关键词: 柴汽比, 催化裂化轻循环油, 加氢处理, 高辛烷值汽油

Abstract: Recent years,with the continuous decline of consumption diesel to gasoline ratio and increasingly stringent of environmental regulations,it is a great challenge to the refineries how to produce high-value products from low-value light cycle oil(LCO). LCO has the characteristics of high density,high content of aromatic hydrocarbon and low content of hexadecane. It's difficult to produce clean diesel through conventional hydrogenation technology from LCO. This paper described the mechanism and technical characteristics of producing more gasoline of high octane content through hydrogenation from LCO,systematically discussed the research progress of relevant technologies employed by well-known petroleum companies worldwide,such as LCO unicracking technology developed by UOP,MAK-LCO technology jointly developed by Mobil-Akzo-Kellogg,FD2G technology developed by FRIPP,RLG,and LTAG technology developed by RIPP. Using optimal combination of catalyst and novel process,heavy polycyclic aromatic hydrocarbons can be directly converted into high octane gasoline blending component of a single ring aromatic hydrocarbon. The results indicate that the technology of producing more gasoline of high octane content from LCO is flexible,and it can produce 35%-65% high octane content gasoline according to requirements of market,reduce the ratio of diesel to gasoline and increases additional value of LCO products. This technology has an extremely broad prospect of commercial applications.

Key words: ration of diesel to gasoline, LCO, hydrogenation, high octane gasoline