Analysis of CO2 Solubility and Absorption Heat into Aqueous 1-Diethylamino-2-propanol

Helei Liu, Raphael Idem, Paitoontontiwachwuthikul, Zhiwu Liang, Wichitpan Rongwong, Jaber Al Marri, Abdelbaki Benamor

Research output: Contribution to journalConference article


In this work, the CO2 equilibrium solubility in 2 M 1-diethylamino-2-propanol (1DEA2P) solution were determined as function of temperature (in the range of 298-333K), and CO2 partial pressure (in the range of 8-101 kPa). The modified Li-shen K2 correlation model was also developed and used to predicate the CO2 equilibrium solubility in 1DEA2P solution. with an excellent ADD of 3.4%. The heat of CO2 absorption in 1DEA2P solution estimated using Gibbs-Helmholtz equation was found to be -45.7 kJ/mol. In addition, the ion (1DEA2P, 1DEA2PH+, HCO3 -, CO3 2-) speciation plots of the 1DEA2P-CO2-H2O system were developed in order to further understand the reaction process of 1DEA2P with CO2. Published by Elsevier Ltd.

Original languageEnglish
Pages (from-to)873-879
Number of pages7
JournalEnergy Procedia
Publication statusPublished - 1 Jan 2017
Externally publishedYes



  • 1DEA2P
  • CO absorption
  • Equilibrium CO solubility
  • Ion speciation plots
  • Liu-Helei model

ASJC Scopus subject areas

  • Energy(all)

Cite this

Liu, H., Idem, R., Paitoontontiwachwuthikul, Liang, Z., Rongwong, W., Al Marri, J., & Benamor, A. (2017). Analysis of CO2 Solubility and Absorption Heat into Aqueous 1-Diethylamino-2-propanol. Energy Procedia, 114, 873-879.