화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.65, 95-103, September, 2018
DOI10.1016/j.jiec.2018.04.017  Export Citation
Cyclic CO2 absorption capacity of aqueous single and blended amine solvents
Sung June Hwang, Miyoung Lee1, Huiyong Kim, and Kwang Soon Lee†
  • Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapogu, Seoul 04107, Republic of Korea
  • 1SK Gas R&D Center, ECO Hub, 332 Pangyo-ro, Bundang-gu, Seongnam-si 13493, Republic of Korea
E-mail:
The cyclic CO2 absorption capacity (cyclic capacity) of aqueous single and blended amines was systematically analyzed for imaginary as well as real amines using thermodynamic models. The Kent.Eisenberg model and Henry’s law were employed to design the single imaginary amines. The protonation constant (pKa) and carbamate stability constant (Kc) were varied over a wide range to cover the main characteristics of existing monoamines applicable for CO2 capture, and the effects of the pKa, Kc, and amine concentration on the cyclic capacity were carefully investigated. Binary imaginary amine blends were designed by mixing an amine with low carbamate preference with one able to generate carbamates. In addition, an analogous investigation was conducted by considering the effect of the blending ratio of binary blends of four real monoamines (methyldiethanolamine, monoethanolamine, diethanolamine, and aminomethylpropanol) to demonstrate the practicality of this approach. Finally, the cyclic capacity of piperazine (diamine) and its binary blends with the four real monoamines was investigated.
Keywords:Carbon capture;CO2 absorption;Aqueous amine-based solvent;Cyclic CO2 absorption capacity;CO2 vapor.liquid equilibrium
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