Carbon dioxide solubility in amine-based deep eutectic solvents: Experimental and theoretical investigation

Khatereh Ali Pishro, Ghulam Murshid*, Farouq Sabri Mjalli, Jamil Naser

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


In this work, ammonium-based Deep Eutectic Solvents (DES) were successfully synthesized using Ethanol amine hydrochloride, and tetraethylenepenta amine (EAHC-TEPA) as a hydrogen bond donor (HBD) with the molar ratios of 1:1, 1:3, 1:6, and 1:9. Carbon dioxide (CO2) solubility was measured in the synthesized DESs above ratios at different pressures and temperatures. The molar ratio of 1:9 showed the best solubility for CO2 among other ratios and was chosen for more in-depth investigation in this work. Solubility data was correlated using response surface methodology (RSM) and ANOVA analysis was performed. The results showed that the temperature and pressure have a significant effect on CO2 solubility and a correlation was successfully developed. The FTIR, NMR characterization and Henry's constant along with other thermodynamic properties such as enthalpy and entropy of absorption were calculated. The physicochemical properties such as density, refractive index, and viscosity were also measured and correlated using a modified Graber and Vogel-Tamman-Fulcher (VTF) equations respectively.

Original languageEnglish
Article number115133
JournalJournal of Molecular Liquids
Publication statusPublished - Mar 1 2021
Externally publishedYes


  • Carbon dioxide
  • Deep eutectic solvents
  • Henry constants
  • Ionic liquids
  • Modeling
  • Solubility
  • Vapor-liquid equilibrium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry


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