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Modelling and experimental study of separators for co-solvent recovery in a supercritical extraction process

Camy, Séverine and Condoret, Jean-Stéphane Modelling and experimental study of separators for co-solvent recovery in a supercritical extraction process. (2006) The Journal of Supercritical Fluids, vol. 3 (n° 1). pp. 51-61. ISSN 0896-8446

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Official URL: http://dx.doi.org/10.1016/j.supflu.2005.03.005

Abstract

Co-solvent recovery in supercritical extraction is addressed here through a theoretical description of the behaviour of a CO2 + co-solvent mixture into a cascade of cyclonic separators, such as those existing in conventional fractionation processes based on depressurisation cascades. Conversely to the conventional simplified approach that considers a separator as a plain theoretical stage, our study proposes a dynamic modelling that accounts for the probable droplet entrainment by the light phase and the re-vaporisation phenomenon after the valve. Fractionation experiments of CO2 + n-propyl alcohol mixtures were operated in a three-stage fractionation pilot, and experimental results are compared with simulation ones. The study demonstrates the relevance of our modelling, and points out the importance of entrainment effects, especially for low-pressure operated separators.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at The Journal of Supercritical Fluids website : http://www.sciencedirect.com/science/journal/08968446
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
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Deposited By: Hélène Dubernard
Deposited On:05 Nov 2008 08:54

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