SRK方程计算烃类混合物的物性参数相当准确,但对CO2和H2S偏差较大,因此a中二元交互作用系数引入的目的就是来修正其影响。Note: SRK equation is quite accurate in calculating the physical property parameters of hydrocarbon mixtures, but it has a large deviation on CO2 and H2S. Therefore, the purpose of introducing the binary interaction coefficient in a is to correct its influence.