Reference

Facilitated transport of carbon dioxide through supported liquid membranes of aqueous amine solutions

Facilitated transport of carbon dioxide through supported liquid membranes of aqueous amine solutions. Teramoto, Masaaki; Huang, Qingfa; Matsuyama, Hideto (Dep. Chem. Maters. Technol., Kyoto Inst. Technol., Kyoto 606, Japan). ACS Symposium Series, 642(Chemical Separations with Liquid Membranes), 239-251 (English) 1996 American Chemical Society. CODEN: ACSMC8. ISSN: 0097-6156. DOCUMENT TYPE: Journal CA Section: 48 (Unit Operations and Processes) A series of expts. on the facilitated transport of CO2 through supported liq. membranes contg. various amines such as monoethanolamine (MEA), diethanolamine (DEA) and ethylenediamine hydrochloride (EDAHCl) was performed. The feed gas was a mixt. of CO2 and CH4. Permeation rate of CO2 through these membranes is in the order, MEA < DEA < EDAHCl. This tendency is discussed quant. on the basis of the facilitated transport theory using the physicochem. properties of amines such as the reaction rate const. 18299-54-2 and 111-42-2 are cas registry numbers of chemicals which are used as reagents here. and chem. equil. const., Keq. It was confirmed that too high value of Keq lowers the permeation rate of CO2. If t1/2L where L is the membrane thickness and t is the tortuosity factor of the microporous support membrane is used as the effective diffusional path length, exptl. obsd. permeation rates of CO2 can be simulated by the facilitated transport theory. A method for estg. the solubilities of CO2 in the membrane solns. from the permeation rates of CH4 is also proposed. .