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Production zone method : a new non-ideal shortcut method for distillation column Design

Abstract : Graphical shortcut methods are useful tools for the design of distillation columns. The proposed nonideal shortcut method includes a graphical representation and is based on the concept of operation leaves. This new method uses a production segment rather than a completely specified product, which eliminates any sensitivity to the composition of the minor product. Concerning phase equilibria, no restrictive assumptions are made. The study aimed (1) to determine whether a specified separation respects the mass balance and thermodynamic feasibility and (2) to find the minimum reflux ratio for a preliminary design of the column. Designs obtained with this new method for ideal, non-ideal, and azeotropic mixtures give purity and recovery rates close to the specifications, which might be impossible to obtain with a conventional ideal shortcut like the well-known Fenske–Underwood–Gilliland shortcut method. The distillation boundaries of azeotropic mixtures are taken into account thanks to a non-ideal thermodynamic model applied to the calculation, which is not the case with a conventional ideal shortcut. The paper examines the following mixtures: an ideal mixture of ethanol, n-propanol, and n-butanol; a non-ideal mixture of acetone, water, and acetic acid; and an azeotropic mixture of acetone, isopropanol, and water.
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Submitted on : Wednesday, July 18, 2018 - 9:36:58 AM
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Guillaume Worms, Michel Meyer, David Rouzineau, Mathias Brehelin. Production zone method : a new non-ideal shortcut method for distillation column Design. Computer Aided Chemical Engineering, Elsevier, 2017, 40, pp.745-750. ⟨10.1016/B978-0-444-63965-3.50126-4⟩. ⟨hal-01842230⟩



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