Prediction of DES' vapor pressure using a new corresponding state model

F. Esmaeilzadeh*, F. Zarei, S. M. Mousavi, G. R. Vakili-Nezhaad

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Application of deep eutectic solvents (DES) in industrial chemical processes has been improved during the last decades. In this work, vapor pressures of 13 classes of DESs (DES 1-13) based on 5 salts and 7 hydrogen bond donors with various combinations of molar ratio were used between 343-393 K. The vapor pressures of the pure and aqueous solutions of DESs were calculated by different equations of state based on "ϕ-ϕ" or "γ-ϕ" γ-ϕ approaches. Additionally, the Voutsas and Wagner models as corresponding-state models were modified to predict the vapor pressure of the pure and aqueous solutions of DES with the total average absolute relative deviations of 7.03, 9.08% and 5.47, 7.15%, respectively. Moreover, the validity of vapor pressure calculation using the two modified models was checked using a linear equation for the average specific heat capacity of different DESs (23 classes of DESs) between 278.15-353.15 K. Results showed that the total average absolute relative deviations of the specific heat capacity of DESs, using the Modified-Voutsas and Modified-Wagner models from the experimental data, were 4.128 and 4.056%, respectively.

Original languageEnglish
Pages (from-to)771-796
Number of pages26
JournalPhysical Chemistry Research
Issue number3
Publication statusPublished - Jun 1 2020
Externally publishedYes


  • Aqueous solutions
  • Corresponding state models
  • Deep eutectic solvents
  • Equation of state
  • Model
  • Prediction
  • Pure compounds
  • Vapor pressure

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry

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