Steady State of an Extractive Distillation Column

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Consider an extractive distillation column operating at atmospheric pressure. This column has 22 stages, a partial reboiler, and a total condenser. It is used to obtain anhydrous ethanol using ethylene glycol as an entrainer.
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Contributed by: Housam Binous and Naim Faqir (July 2012)
Open content licensed under CC BY-NC-SA
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The expressions for pure component vapor and liquid enthalpies were adapted from Aspen HYSYS®.
The mixture is assumed to obey the modified Raoult's law, and the activity coefficients are predicted using the Wilson model.
References
[1] M. F. Doherty and M. F. Malone, Conceptual Design of Distillation Systems, Boston: McGraw–Hill, 2001.
[2] E. J. Henley and J. D. Seader, Equilibrium-Stage Separation Operations in Chemical Engineering, New York: Wiley, 1981.
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