催化裂化汽油提质增效应用研究

中海油惠州石化有限公司(惠州石化)两套催化裂化装置所产的稳定汽油经S Zorb装置处理后的催化裂化汽油占汽油池的比重超过85%,因催化裂化汽油的苯和烯烃含量较高,需提高低烯烃、低苯含量组分的调合比例,以满足乙醇汽油调合指标要求。结合惠州石化催化裂化汽油性质以及工业装置现状,开展催化裂化汽油轻、中、重三馏分切割,中馏分作重整预加氢掺混料,轻、重馏分直接作为汽油池调合组分的深加工应用研究。结果表明:中馏分适宜的切割温度范围为65~155℃,其加氢产物满足重整进料的各项指标要求,芳烃潜含量提高约4百分点;中馏分抽出50%后的催化裂化汽油,苯的体积分数由0.83%降至0.65%,辛烷值略有提高,但烯烃含量基本持平,其他主要性质满足车用汽油相关指标要求。

Application research of FCC gasoline for improving quality and benefit

The stable gasoline produced by two sets of catalytic cracking units of CNOOC Huizhou Petrochemical Company(Huizhou Petrochemical Company) is treated by S Zorb unit. The proportion of product catalytic cracking gasoline in gasoline pool is over 85%. Because of the high benzene and olefin content of catalytic cracking gasoline, the blending ratio of low olefin and low benzene content components should be increased to meet the requirements of ethanol gasoline blending index. Combining with the properties of FCC gasoline and the status quo of industrial units in Huizhou Petrochemical Company, the deep processing application of light, medium and heavy fraction of FCC gasoline, medium fraction as reforming pre-hydrogenation admixture and light and heavy fraction as blending components of gasoline pool is studied. The test results show that the optimization distillation segment of medium fraction of FCC gasoline is 65~155 ℃, and the properties of pre-hydrogenated product meet raw material specification of reforming unit. Furthermore, the aromatics potential content increases by about 4 percentage points. The properties of FCC gasoline in which the medium fraction is took out 50% are that the content of benzene decreases from 0.83% to 0.65%, and octane number improves appreciably, but the content of olefin is unchanged basically, and other main properties meet gasoline Ⅵ specification.