Facilitated Transport of Carbon Dioxide through an Immobillized Liquid Membrane of K2CO3/KHCO3 Aqueous Solution

Park SW; Heo NH; Kim JS; Suh DS

Korean Journal of Chemical Engineering, Vol.14, No.5, 312-320, September, 1997

Facilitated Transport of Carbon Dioxide through an Immobillized Liquid Membrane of K₂CO₃/KHCO₃ Aqueous Solution

The facilitated transport of CO₂ through a hydrophilic polymeric membrane immobilized with K₂CO₃/KHCO₃ buffer solution has been investigated. The reaction of dissolved CO₂ in electrolyzed alkaline solution must consider hydration of CO₂ with water, chemical reaction of CO₂ with OH^- and dissociation of HCO^3- into CO₃^2-. It is necessary to simplify these reactions as a simple model, which is used to analyze the transport system. From experiments in the liquid membrane with alkaline buffer solution, it si shown that the flux of CO₂ into K₂CO₃/KHCO₃ aqueous solution can be enhanced by the presence of CO₃^2-. A diffusion model with an overall reaction based on the film theory is proposed that proposed that predicts the experimentally observed facilitation factor with resonable accuracy. The present model is compared with the rigorous diffusion model involving the complicated conventional chemical reactions.

Keywords:Facilitated Transport;Alkaline Buffer Solution;CO₂;Film Theory Immobilized Liquid Membrane

[References]

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Park SW, Park DW, Suh DS, Heo NH, HWAHAK KONGHAK, 33(3), 318 (1995)
Pinsent BRW, Peason L, Roughton FJW, Trans. Faraday Soc., 52, 1512 (1956)
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[1] Chee YC, Jung YW, Ihm SK, HWAHAK KONGHAK, 24(3), 227 (1986)

[2] Danckwerts PV, Sharma MM, Chem. Eng., 244 (1966)

[3] Danckwerts PV, "Gas-Liquid Reactions," McGraw-Hill Book Company (1970)

[4] Doraiswany LK, Sharma MM, "Heterogeneous Reaction: Analysis, Examples and Reactor Design," volume 2, John Wiley & Sons, New York, 2, 19 (1984)

[5] Friedlander SK, Keller KH, Chem. Eng. Sci., 20, 121 (1965)

[6] Gibbons BH, Edsall JT, J. Biol. Chem., 238, 3502 (1963)

[7] Goddard JD, Schultz JS, Bassett RJ, Chem. Eng. Sci., 25, 665 (1970)

[8] Hikita H, Asai S, Takatsuka T, Chem. Eng. J., 11, 131 (1976)

[9] Kemena LL, Noble RD, Kemp NJ, J. Membr. Sci., 15, 259 (1983)

[10] Kern DM, J. Chem. Educ., 37, 14 (1960)

[11] Kesting RE, Fritzsche AK, "Polymer Gas Separation Membrane," John Wiley & Sons (1993)

[12] Kohl AL, Riesenfeld FC, "Gas Purification," Gulf Publishing Co. (1985)

[13] LeBlanc OH, Ward WJ, Matson SL, J. Membr. Sci., 6, 339 (1980)

[14] Olander DR, AIChE J., 6, 233 (1960)

[15] Park SW, Park DW, Suh DS, Heo NH, HWAHAK KONGHAK, 33(3), 318 (1995)

[16] Pinsent BRW, Peason L, Roughton FJW, Trans. Faraday Soc., 52, 1512 (1956)

[17] Smith KA, Meldon JH, Colton CK, AIChE J., 19, 102 (1973)

[18] Schultz JS, Goddard JD, Suchdeo SR, AIChE J., 20, 417 (1974)

[19] Ward WJ, Robb WL, Science, 156, 1481 (1967)

[20] Ward WJ, AIChE J., 16, 405 (1970)