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Rouzbeh Ramezani, Renzo Di Felice. Kinetics study of CO2 absorption in potassium carbonate solution promoted by diethylenetriamine. Green Energy&Environment, 2021, 6(1): 83-90. doi: 10.1016/j.gee.2019.11.004
Citation: Rouzbeh Ramezani, Renzo Di Felice. Kinetics study of CO2 absorption in potassium carbonate solution promoted by diethylenetriamine. Green Energy&Environment, 2021, 6(1): 83-90. doi: 10.1016/j.gee.2019.11.004
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Kinetics study of CO2 absorption in potassium carbonate solution promoted by diethylenetriamine

doi: 10.1016/j.gee.2019.11.004

  • Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via Opera Pia 15, 16145, Genova, Italy

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  • Corresponding author: E-mail address: rouzbeh.ramezani@edu.unige.it (Rouzbeh Ramezani)
  • Received date 16 February 2019, Accepted date 25 November 2019, RevRecd date 22 September 2019, Available online 07 December 2019, Publish date 28 February 2021,
    Abstract
  • In this work, characterization and kinetics of CO2 absorption in potassium carbonate (K2CO3) solution promoted by diethylenetriamine (DETA) were investigated. Kinetics measurements were performed using a stirred cell reactor in the temperature range of 303.15–323.15 K and total concentration up to 2.5 kmol m−3. The density, viscosity, physical solubility, CO2 diffusivity and absorption rate of CO2 in the solution were determined. The reaction kinetics between CO2 and K2CO3 + DETA solution were examined. Pseudo-first order kinetic constants were also predicted by zwitterion mechanism. It was revealed that the addition of small amounts of DETA to K2CO3 results in a significant enhancement in CO2 absorption rate. The reaction order and activation energy were found to be 1.6 and 35.6 kJ mol−1, respectively. In terms of reaction rate constant, DETA showed a better performance compared to the other promoters such as MEA, EAE, proline, arginine, taurine, histidine and alanine.

     

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