【摘要】 根据汽油详细烃组成模拟计算了典型成品汽油不同馏分段的研究法辛烷值,获得了汽油馏分不同类型组分辛烷值和沸点分布的关系以及对样品辛烷值的贡献率。结果表明,不同类型组分辛烷值贡献率由大到小的顺序依次为芳烃、异构烷烃、烯烃、甲基叔丁基醚(MTBE)、环烷烃和正构烷烃。92#汽油辛烷值按照沸点的分布,呈现出两头大、中间小的特点。其中小于60℃的轻端馏分辛烷值的贡献主要来源于烯烃组分,大于120℃馏分段的辛烷值贡献主要来源于芳烃组分。90~120℃馏分有最低的辛烷值,60~90℃馏分有最低的辛烷值贡献率。加入一定量的烷基化汽油后,可以提高90~120℃馏分的辛烷值,改善汽油辛烷值的分布。更多还原

【Abstract】 A model for calculating research octane number(RON)of gasoline from its detailed hydrocarbon composition was established,and RON of different boiling range fractions of gasoline were calculated.The contribution to RON of different types of hydrocarbons and the RON distribution according to boiling points were achieved.The results showed that the contribution ratios to octane number of aromatic,iso-paraffins,olefins,methyl tert-butyl ether(MTBE),naphthenes and n-paraffins reduced in turn.The RON distribution according to boiling points of92#gasoline possessed the characteristic of high values of light and heavy fractions whereas a relative lower value of middle fractions.Olefins were the chief components for the contribution to RON in the light fraction with boiling point below 60℃,and in the heavy fractions with boiling points above 120℃,aromatics were the chief components for the contribution to RON.The fraction with boiling range from 90℃ to 120℃ had the lowest RON,and the fraction with boiling range from 60℃to 90℃ had the lowest RON contribution ratio.The octane number of the fraction with boiling range from 90℃to 120℃could increase when an amount of alkylate was added to gasoline,which would improve the octane number distribution.更多还原