FACILITATED TRANSPORT OF CARBON DIOXIDE THROUGH AN IMMOBILIZED LIQUID MEMBRANE OF K2CO3/KHCO3 AQUEOUS SOLUTION

다국어 초록 (Multilingual Abstract)

The facilitated transport of CO₂ through a hydrophilic polymeric membrane immobilized with K₂CO₃/KHCO₃, buffer solution has been investigated. The reactions of dissolved CO₂ in electrolyzed alkaline solution must consider hydration of CO₂ with water, chemical reaction of CO₂ with OH and dissociation of HCO₃ into CO₃. 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 is shown that the flux of CO₂into K₂CO₃/KHCO₃aqueous solution can be enhanced by the presence of CO₃². A diffusion model with an overall reaction based on the film theory is proposed that predicts the experimentally observed facilitation factor with reasonable accuracy. The present model is compared with the rigorous diffusion model involving the complicated conventional chemical reactions.