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"Integrated Column Designs for Minimum Energy and Entropy Requirements in Multicomponent Distillation", Ivar J. Halvorsen and Skogestad, Prepared for presentation at the Topical conference on Separations Technology, Session 23 - Distillation Modeling and Processes II. 2001 AIChE Annual meeting, Reno, Nevada, November 5-9.

Abstract.
In the evaluation of minimum energy consumption (1st law) we here also discuss minimum entropy production, or lost work (2nd law). This leads us to the reversible Petlyuk arrangement. However the total required heat supply is higher in this case than for the typical (adiabatic) Petlyuk arrangements, but there is a potential for further reduction by use of internal heat integration. This principle can also be applied to general arrangements (not only reversible) and we compare set of alternative distillation arrangements for a given feed example. We also conjecture that the generalized extended adiabatic (not reversible) Petlyuk arrangement require less energy than any other adiabatic arrangement at constant pressure when we consider configurations without internal heat integration.

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