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参照Jensen饱和蒸汽压模型,利用C3～C80共78个正构烷烃的常压沸点数据,以最小二乘法回归得到了两套 A_k 参数修正值。与文献中 A_k 参数值相比,本文 A_k 参数修正值的适用范围更加广泛,可以模拟更宽馏程范围的石油窄馏分。两套参数修正值的拟合情况均呈现较好正态分布,利用本文 A_k 参数修正值计算所得的饱和蒸汽压数据较文献更加逼近实验值。参数修正值1适合于模拟正构烷烃碳数在3～52之间的石油窄馏分,而参数修正值2适合于模拟正构烷烃碳数在9～80之间的石油窄馏分。
According to the Jensen saturated vapor pressure model, two sets of A_k parameter correction values were obtained by the least-squares regression using the atmospheric boiling point data of 78 n-alkanes from C3 to C80. Compared with the A_k parameter in the literature, the correction value of A_k in this paper can be applied more extensively, which can simulate a narrow range of petroleum fractions with wider range. The fit of the two sets of parameter correction values showed a good normal distribution. The saturated vapor pressure data calculated by using the A_k parameter correction value in this paper are more approximate to the experimental values than the literature. Parameter correction 1 is suitable for modeling narrow fractions of n-alkanes with carbon numbers between 3 and 52 while parameter correction 2 is suitable for modeling narrow fractions of n-alkanes with carbon numbers between 9 and 80.