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Rate-based simulation of a high pressure counter-current packed column for supercritical CO 2 extraction of alcohol from dilute aqueous mixtures

Gañán, Nicolás and Morchain, Jérôme and Camy, Séverine and Condoret, Jean-Stéphane Rate-based simulation of a high pressure counter-current packed column for supercritical CO 2 extraction of alcohol from dilute aqueous mixtures. (2018) The Journal of Supercritical Fluids, 135. 168-179. ISSN 0896-8446

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Official URL: https://doi.org/10.1016/j.supflu.2018.01.020

Abstract

In this work, the modeling and simulation of a fractionation packed column for the recovery of isopropanol from dilute aqueous mixtures using supercritical CO2 is presented. The model is based on the numerical resolution of differential mass balances for each component over the column height. The multicomponent mass transfer between phases is described using a “rate-based” approach and the concept of local mass transfer coefficients. The model was validated by reproduction of experimental steady-state results for the fractionation of 5% isopropanol aqueous solutions obtained in a bench scale counter-current column. The effect of process conditions on the separation performance was satisfactorily described by the model calculations, showing that operation pressure and CO2 flow rate enhance IPA recovery and extract purity, while operation temperature has a negative effect. Model deviations (AARD) were in all cases lower than 20%.

Item Type:Article
HAL Id:hal-01886459
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Other partners > Universidad Nacional de Cordoba - UNC (ARGENTINA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:09 Jan 2019 13:20

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