Chemical absorption of carbon dioxide with asymmetrically heated polytetrafluoroethylene membranes |
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Authors: | Chen Shia-Chung Lin Su-Hsia Chien Rean-Der Wang Yuen-Hua Hsiao Hseun-Chi |
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Affiliation: | Department of Mechanical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC. |
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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. |
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Keywords: | Carbon dioxide absorption Polytetrafluoroethylene membrane Asymmetric membrane Gas absorption membrane Membrane contactor asymmetrically heating Monoethanolamine |
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