2005
DOI: 10.1021/ie050526y
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Facilitated Transport of CO2 through Immobilized Liquid Membrane

Abstract: Selective removal of acid gases from a contaminated gas stream was studied using four amines (diethylenetriamine (DETA), diaminoethane (DAE), diethylamine (DEYA), and bis(2-ethylhexyl)amine (BEHA)) as immobilized liquids in a facilitated transport membrane. The effect of amine concentration, CO 2 partial pressure, and operating temperature on the permeance of CO 2 and CH 4 was investigated for each aqueous amine solution. The observed CO 2 permeance decreased with increasing CO 2 feed pressure, whereas the per… Show more

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Cited by 30 publications
(10 citation statements)
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“…Aside, as the feed pressure increases, the CO 2 permeance decreases dramatically at low pressures, while the reduction is much more modest at higher pressures. This is due to the carrier saturation phenomenon . The CO 2 concentration and CO 2 –amine complexes formed in the membrane significantly affect the CO 2 permeance across the PVA/amine membranes.…”
Section: Resultsmentioning
confidence: 99%
“…Aside, as the feed pressure increases, the CO 2 permeance decreases dramatically at low pressures, while the reduction is much more modest at higher pressures. This is due to the carrier saturation phenomenon . The CO 2 concentration and CO 2 –amine complexes formed in the membrane significantly affect the CO 2 permeance across the PVA/amine membranes.…”
Section: Resultsmentioning
confidence: 99%
“…Immobilized liquid membranes, swollen membranes, and fixed carrier membranes are the main three configurations of facilitated transport membranes. Models for immobilized liquid membranes have been extensively studied. This work focuses on a fixed carrier polymer membrane, which selectively complexes with penetrants via reactive groups of its repeating units. Recently, new facilitated transport membranes for carbon dioxide separations have been developed.…”
Section: Introductionmentioning
confidence: 99%
“…Generally as the feed pressure increases, the CO 2 permeance drops off sharply at low pressure region, while the reduction is much gently at higher pressure. This is attributed to carrier saturation phenomenon [21,37,39,46]. However, a small reduction in CH 4 permeance is observed when the feed pressure increases.…”
Section: Pure Gas Experimentsmentioning
confidence: 99%
“…Accordingly, the amine carrier concentration gradually reaches saturation state in PVA membrane. Carrier saturation and gradual reduction of gas permeability with pressure are typical behavior of FTMs [21,[37][38][39]. The severe tendency of CO 2 transport will be moderated at higher CO 2 feed pressures.…”
Section: Permselectivity Of Amine-pva Membranesmentioning
confidence: 99%
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