Investigating the Solubility of CO2 in the Solution of Aqueous K2CO3Using Wilson-NRF Model

Document Type: Research Paper


chemical engineering, Ferdowsi university, Mashhad, Iran



Hot potassium carbonate (PC) solution in comparison with amine solution had a decreased energy of regeneration and a high chemical solubility of . To present vapor and liquid equation (VLE) of this system and predict  solubility, the ion specific non-electrolyte Wilson-NRF local composition model (isNWN) was used in this study; the framework of this model was molecular. Therefore, it was suitable for both electrolyte and non-electrolyte solutions. The present research employed the NWN model and the Pitzer-Debye-Hückel theory in order to assess the contribution of the excess Gibbs energy of electrolyte solutions in a short and long range. The data of  solubility in water and the system of aqueous  were correlated in the model considering a temperature range of and a pressure range ofand . The average absolute error of ( ) and ( ) systems were  and  respectively. The results and comparisons with other models proved that the experimental data were exactly correlated in the model.


Articles in Press, Accepted Manuscript
Available Online from 09 October 2019
  • Receive Date: 10 March 2018
  • Revise Date: 28 April 2018
  • Accept Date: 23 May 2018