Experimental, modeling and RSM optimization of CO2 loading for an aqueous blend of diethylenetriamine and 3-dimethyl amino-1-propanol

Post-combustion CO 2 capture by aqueous amine solvent is one of the most promising methods for mitigating the presence of CO 2 in the environment. In this work, a novel amine blend of Diethylenetriamine and 3-Dimethyl amino-1-propanol was selected. Experiments were performed in the temperature range...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2023, 40(5), 278, pp.1151-1167
Main Authors: Gupta, Akhil Kumar, Gautam, Ashish, Mondal, Monoj Kumar
Format: Article
Language:English
Subjects:
Biotechnology
Carbon dioxide
Carbon sequestration
Catalysis
Chemistry
Chemistry and Materials Science
Diethylene triamine
Empirical analysis
Heat of absorption
Independent variables
Industrial Chemistry/Chemical Engineering
Materials Science
Optimization
Partial pressure
Response surface methodology
Separation Technology
Thermodynamics
Three dimensional models
Variance analysis
화학공학
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Summary:Post-combustion CO 2 capture by aqueous amine solvent is one of the most promising methods for mitigating the presence of CO 2 in the environment. In this work, a novel amine blend of Diethylenetriamine and 3-Dimethyl amino-1-propanol was selected. Experiments were performed in the temperature range of 293.15–323.25 K, mole fraction of diethylenetriamine in the range of 0.05–0.2, partial pressure of CO 2 in the range of 10.13–25.33 kPa and solution concentration in the range of 1–3 mol·L −1 . Effects of these parameters on equilibrium CO 2 loading were judged at various operating conditions. An empirical model was developed for the calculation of equilibrium CO 2 loading in the aqueous amine blend. The heat of absorption of CO 2 for this amine blend was found to be −65.22 kJ·mol −1 . Response surface methodology (RSM) was used for optimization and a quadratic model was selected. The analysis of variance was used to prove the significance of the selected model. Three-dimensional diagrams and contour plots of independent variables were also shown. Optimum CO 2 loading by RSM was found to be 1.068 mol CO 2 ·mol amine −1 at temperature 294.15 K, mole fraction of diethylenetriamine 0.20, solution concentration 1.3 mol/l, and partial pressure of CO 2 24.22 kPa.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-022-1300-3