Cyclic CO2 absorption capacity of aqueous single and blended amine solvents
| Autor: | Kwang Soon Lee, Huiyong Kim, Miyoung Lee, Sung June Hwang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Carbamate
Diethanolamine Aqueous solution General Chemical Engineering medicine.medical_treatment Inorganic chemistry 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Piperazine 020401 chemical engineering chemistry Stability constants of complexes Diamine Co2 absorption medicine Amine gas treating 0204 chemical engineering 0105 earth and related environmental sciences |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 65:95-103 |
| ISSN: | 1226-086X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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