Kinetics study of CO2 absorption in potassium carbonate solution promoted by diethylenetriamine

Rouzbeh Ramezani, Renzo Di Felice

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
JournalGreen Energy and Environment
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Absorption rate
  • CO capture
  • Gas absorption
  • Kinetic study
  • Reaction rate constant

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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