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 , which are shown by red dots. The vapor-liquid equilibrium data is also plotted in a separate diagram.
 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 .