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CFD Simulation of Dense Gas Extraction through Polymeric Membranes

Authors: Azam Marjani, Saeed Shirazian


In this study is presented a general methodology to predict the performance of a continuous near-critical fluid extraction process to remove compounds from aqueous solutions using hollow fiber membrane contactors. A comprehensive 2D mathematical model was developed to study Porocritical extraction process. The system studied in this work is a membrane based extractor of ethanol and acetone from aqueous solutions using near-critical CO2. Predictions of extraction percentages obtained by simulations have been compared to the experimental values reported by Bothun et al. [5]. Simulations of extraction percentage of ethanol and acetone show an average difference of 9.3% and 6.5% with the experimental data, respectively. More accurate predictions of the extraction of acetone could be explained by a better estimation of the transport properties in the aqueous phase that controls the extraction of this solute.

Keywords: Modeling, mass transfer, Membrane, solvent extraction, Densegas

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[1] M. Sims, Porocritical fluid extraction from liquids using nearcritical fluids. Membrane Technology 97 (1998), 11-12.
[2] G. Afrane, E.H. Chimowitz, Experimental investigation of a new supercritical fluid-inorganic membrane separation process. Journal of Membrane Science 116 (1996), 293-299.
[3] M. Sims, E. McGovern, J.R. Robinson, Porocritical fluid extraction application: continuous pilot extraction of natural products from liquids with near critical fluids. Proceeding of the Fifth Meeting on Supercritical Fluids, Materials and Natural Processing, Nice, France, March (1998).
[4] M. Budich, G. Brunner, Supercritical fluid extraction of ethanol from aqueous solutions. Journal of Supercritical Fluids 25 (2003), 45-55.
[5] G. Bothun, B. Knutson, H. Strobel, S. Nokes, E. Brignole, S. Diaz, Compressed solvents for the extraction of fermentation products within a hollow fiber membrane contactor. Journal of Supercritical Fluids 25 (2003), 119-134.
[6] R.B. Bird, W.E. Stewart, E.N. Lightfoot, Transport Phenomena, JohnWiley & Sons, 1960.
[7] J. Happel, Viscous flow relative to arrays of cylinders, AIChE J. 5 (1959) 174-177.
[8] Estay, H.; Bocquet, S.; Romeroa, J.; Sanchez, J.; Rios, G. M.; Valenzuela, F. Modeling and simulation of mass transfer in near-critical extraction using a hollow fiber membrane contactor. Chem. Eng. Sci. 2007, 62, 5794-5808.