화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.11, No.2, 202-209, March, 2005
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Kinetics of Absorption of Carbon Dioxide in Monoethanolamine Solutions of Polar Organic Solvents
Sang-Wook Park†, Joon-Wook Lee, Byoung-Sik Choi, and Jae-Wook Lee1
  • Division of Chemical Engineering, Pusan National University, Pusan 609-735, Korea
  • 1Department of Chemical Engineering, Sogang University, Seoul 121-742, Korea
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The chemical absorption rate of carbon dioxide with monoethanoamine was measured in such non-aqueous solvents as methanol, ethanol, n-propanol, n-butanol, ethylene glycol, propylene glycol, propylene carbonate, and water at 298 K and 101.3 kPa using a semi-batch stirred tank with a planar gas-liquid interface. The pseudo-first-order reaction rate constant obtained from the measured rate of absorption was used to obtain the elementary reaction rate constants in complicated reactions represented by zwitterionic mechanisms and the order of the overall reaction of CO2 with amine. The enhancement factor of carbon dioxide at a low concentration of MEA was obtained using the reaction rate constants obtained under the conditions of a pseudo-first-order, fast reaction regime. Correlation between the elementary reaction rate constant and the solubility parameter of the solvent is presented.
Keywords:absorption;carbon dioxide;monoethanolamine
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