title: Chemical absorption of carbon dioxide with asymmetrically heated polytetrafluoroethylene membranes.
abstract: In this study, the absorption of carbon dioxide using an absorbent composed of 2-amino-2-methyl-L-propanol (AMP) + monoethanolamine (MEA) + piperazine (PZ) in asymmetric and symmetric polytetrafluoroethylene (PTFE) membrane contactors was investigated. Experiments were conducted using various gas flow rates, liquid flow rates, and absorbent blends. CO(2) recovery increased with increasing liquid flow rates. The mean pore size of PTFE membrane reduced via heating treatment. An asymmetric membrane had a better CO(2) recovery than a symmetric membrane. For the asymmetric membrane, placing the smaller pore-size side of the membrane in contact with the liquid phase, reduced the level of wetting of the membrane. The membrane mass transfer coefficient and durability of the PTFE membrane were enhanced by asymmetrically heating.
authors.affiliation: Department of Mechanical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC.
authors.forename: Shia-Chung
authors.initials: SC
authors.lastname: Chen
authors.forename: Su-Hsia
authors.initials: SH
authors.lastname: Lin
authors.forename: Rean-Der
authors.initials: RD
authors.lastname: Chien
authors.forename: Yuen-Hua
authors.initials: YH
authors.lastname: Wang
authors.forename: Hseun-Chi
authors.initials: HC
authors.lastname: Hsiao
mesh_terms: D000042:Absorption; D002245:Carbon Dioxide / Q000378:metabolism*; D052918:Environmental Restoration and Remediation / Q000379:methods; D019856:Ethanolamine; D005465:Fluorocarbon Polymers / Q000737:chemistry; D008566:Membranes; D000077489:Piperazine; D010879:Piperazines; D016062:Porosity; D011412:Propanolamines; D013499:Surface Properties
chemical_list: D005465:Fluorocarbon Polymers; D010879:Piperazines; D011412:Propanolamines; D002245:Carbon Dioxide; D000077489:Piperazine; C010946:polytetrafluoroethane; D019856:Ethanolamine; C006551:2-amino-2-methyl-1-propanol