CFD Simulation of Dense Gas Extraction through Polymeric Membranes
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.
[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.
[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.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:53433", author = "Azam Marjani and Saeed Shirazian", title = "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.
[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 = "Solvent extraction, Membrane, Mass transfer, Densegas, Modeling", volume = "4", number = "1", pages = "29-5", }