摘要
建立了一种新的气相色谱结果关联计算汽油辛烷值的方法。采用高分辨毛细管柱对汽油的组成进行测定,根据汽油单体烃组分的含量和纯组分辛烷值乘积的大小,将单体烃组分分为两组,每一组为一个变量,建立实测辛烷值与两个变量间的回归模型。实际分析时,根据不同的样品类型选择不同的模型进行关联计算即可获得色谱分析样品的辛烷值。对模型建立和应用过程中已知结构的化合物的辛烷值数据采用文献值。对只知碳数和类型而不能确定其化合物结构的组分,通过对文献数据进行统计计算,得到平均辛烷值与组分的碳数和类型的关系曲线,据此得到其平均辛烷值用于计算。与采用标准方法测定催化裂化汽油辛烷值的结果相比,该方法测定辛烷值的偏差约0 5个单位。该方法操作简单,用样量少,模型建立过程快速、简便,适合于微型反应器产物评价或炼厂稳定工艺装置的汽油辛烷值的监测。
A new method has been established for the calculation of the octane number of gasoline from the results of gas chromatographic analysis. High resolution capillary column was applied to obtain the results of the detailed hydrocarbon analysis. The components in the gasoline sample were divided into two groups according to the multiple results of the amount of each component with its octane number, and each group was defined as a variable. The regression model has been established between the two variables and the actually determined octane numbers. The octane numbers of gasoline samples were calculated by selecting different models according to the type of gasoline sample in practical analysis. For the identified compounds, their octane numbers used for model establishment were obtained from references. For the components whose carbon number and type are known but the structure is uncertain, a statistical calculation of reference data was applied to obtain the formula of average octane number versus the carbon numbers and types of components, from which the average octane numbers were obtained. When the method was applied to determine the octane numbers of fluid catalytic cracking gasoline samples, the deviation of results was about 0.5 unit compared with the standard method. This method is easy to manipulate, and the modeling process is fast and easy to achieve. It is suitable for measuring the octane numbers of the gasoline samples from microreactor products and refinery units.
出处
《色谱》
CAS
CSCD
北大核心
2003年第1期81-84,共4页
Chinese Journal of Chromatography
关键词
气相色谱
辛烷值
汽油
gas chromatography
octane number
gasoline
