Ponchon-Savarit Diagram for Methanol-Water Mixture

This Demonstration shows plots of the Ponchon–Savarit diagram (i.e., and ) for a methanol-water mixture at user-set values of the total pressure, . In addition, the tie lines or isotherms are shown in green. The data obtained in our simulation, for , agrees very well with those given in Henley and Seader's classic textbook [1], which are shown by red dots. The vapor-liquid equilibrium data is also plotted in a separate diagram.


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[1] E. J. Henley and J. D. Seader, Equilibrium-Stage Separation Operations in Chemical Engineering, New York: Wiley, 1981.
Expressions for pure component vapor and liquid enthalpies were adapted from Aspen-HYSYS. Enthalpies are above and are given in .
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