IEC 9 |
| Masaaki Teramoto1, Nobuaki Ohnishi1, Satoshi Kitada1, Hideto Matsuyama1, Norifumi Matsumiya2, and Hiroshi Mano2. (1) Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-585, Japan, (2) RITE, 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto, 619-0292, Japan |
| A novel facilitated transport membrane for gas separation using a capillary membrane module is proposed in which a carrier solution and dissolved feed gas is forced to permeate the ultrafiltration membrane and flow upward co-currently. The permeate flows down on the outer surface of the membrane and liberates dissolved gas to form a lean solution which is recirculated. This type of capillary membrane module was applied to the separation of CO2 from model flue gases consisting of CO2 and N2. Various amines such as monoethanolamine (MEA) and diethanolamine (DEA) were used as carriers or absorbents of CO2. CO2 in the feed gas was successfully concentrated from 5 - 15 % to more than 98%. Compared to conventional facilitated transport membranes in which only molecular diffusion occurs, much higher permeation rates can be obtained due to convective transport of gas accompanied by permeation of the carrier solution. In addition, due to continuous contacting of the membrane with the carrier solution, the instability problem caused by the loss of the carrier solution from the membrane pores can be prevented. |
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Separations Science Approaches to Carbon Management (Cosponsored by Separation Science & Technology Subdivision)
9:00 AM-11:55 AM, Sunday, March 23, 2003 Convention Center -- Room 393, Oral
Division of Industrial and Engineering Chemistry |