Correlation and prediction of thermodynamic properties of binary mixtures from perturbed chain statistical associating fluid theory

• Densities and viscosities of the mixtures (DEA + 2-alkanols) were measured.
• PC-SAFT model was applied to predict some thermodynamic properties of mixtures.
• Compatibility between experimental data and predicted values by PC-SAFT model is satisfactory.

Densities and viscosities for binary mixtures of Diethanolamine (DEA) + 2 alkanol (2 propanol up to 2 pentanol) were measured over the entire composition range and temperature interval of 293.15–323.15 K. From the density and viscosity data, values of various properties such as isobaric thermal expansibility, excess isobaric thermal expansibility, partial molar volumes, excess molar volumes and viscosity deviations were calculated. The observed variations of these parameters, with alkanols chain length and temperature, are discussed in terms of the intermolecular interactions between the unlike molecules of the binary mixtures. The ability of the perturbed chain statistical associating fluid theory (PC-SAFT) to correlate accurately the volumetric behavior of the binary mixtures is demonstrated.