过热液体的热力学理论

The prediction of thermodynamic theoretical limit of superheat

应用热力学稳定性条件 ,推导得到了二元混和物的稳定性极限条件 ;并把稳定性极限条件应用于三种状态方程中 ,从而得到了其相应的 Spinodal曲线 ;且由 RK方程得到的 Spinodal曲线与实验数值符合较好 ,因此进行正烷烃类混和物的过热极限的热力学理论预测时 ,应选用 RK方程。

On the basis of the mechanical stability condition,liquid spinodals for the binary mixtures were derived from Rdelich-Kwong equation、Peng-Robinson equation and Soave equation.Liquid spinodal of Redlich-Kwong were found to be in good agreement with the measured limits of supcrheat.Thus ,Redlich-Kwong equation can be used for the prediction of thermodynamic theoretical limit of n-alkane mixtures.