催化裂化轻循环油(LCO)加氢处理多产高辛烷值汽油技术研究进展

Research progress on producing more high octane gasoline through hydrogenation from FCC light cycle oil(LCO)

近年来随着消费柴汽比的不断下降和环保法规的日益严格,如何将低附加值的催化裂化轻循环油(LCO)加工成高附加值的产品成为炼厂面临的重大挑战。LCO具有高密度、高芳烃含量、低十六烷值的特点,难以通过常规加氢技术生产清洁柴油。本文阐述了LCO加氢处理多产高辛烷值汽油技术反应机理和技术特点,系统介绍了国内外知名石油公司相关技术的研究进展,UOP公司开发的LCO Unicracking技术、Mobil–Akzo-Kellogg联合开发的MAK-LCO技术,以及国内中国石化抚顺石油化工研究院开发的FD2G技术、中国石化石油化工科学研究院开发的RLG和LTAG技术。该类技术通过催化剂和工艺技术的优化组合可将重质多环芳烃定向转化为单环芳烃的高辛烷值汽油调和组分。研究结果表明,LCO加氢处理多产高辛烷值汽油技术加工方案灵活,可按市场需求生产35%~65%的高辛烷值汽油,在降低柴汽比的同时提高了LCO产品附加值,具有广阔的市场应用前景。

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.