Commenced in January 2007
Paper Count: 30067
CFD Simulation of Dense Gas Extraction through Polymeric Membranes
Abstract: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. . 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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331935Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF
 M. Sims, Porocritical fluid extraction from liquids using nearcritical fluids. Membrane Technology 97 (1998), 11-12.
 G. Afrane, E.H. Chimowitz, Experimental investigation of a new supercritical fluid-inorganic membrane separation process. Journal of Membrane Science 116 (1996), 293-299.
 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).
 M. Budich, G. Brunner, Supercritical fluid extraction of ethanol from aqueous solutions. Journal of Supercritical Fluids 25 (2003), 45-55.
 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.
 R.B. Bird, W.E. Stewart, E.N. Lightfoot, Transport Phenomena, JohnWiley & Sons, 1960.
 J. Happel, Viscous flow relative to arrays of cylinders, AIChE J. 5 (1959) 174-177.
 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.