The \(x-y\) diagram (vapor mole fraction versus liquid mole fraction) for vapor-liquid equilibrium (VLE) is shown for a methanol/water mixture being fed to a flash drum. The corresponding \(T-x-y\) diagram shows how the points on the \(x-y\) diagram are obtained; each point corresponds to a different temperature. Use buttons to view the \(x-y\) and \(T-x-y\) diagrams separately or to view both simultaneously. Use the "liquid/vapor ratio" slider to select the ratio leaving the flash drum; use the other slider to select the feed composition to the flash separation.

1. P. C. Wankat, Separation Process Engineering: Includes Mass Transfer Analysis, 3rd ed., Upper Saddle River, NJ: Prentice Hall, 2012.

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