Evaluation of thermodynamic properties of fluid mixtures by PC-SAFT model

• Densities and viscosities of the mixtures (MIK + 2-alkanols) were measured.
• PC-SAFT model was applied to correlate the volumetric properties of binary mixtures.
• Agreement between experimental data and calculated values by PC-SAFT model is good.

Densities and viscosities of binary mixtures of methyl isobutyl ketone (MIK) with polar solvents namely, 2-propanol, 2-butanol and 2-pentanol, were measured at 7 temperatures (293.15–323.15 K) over the entire range of composition. Using the experimental data, excess molar volumes VmE, isobaric thermal expansivity αpαp, partial molar volumes V¯m,i and viscosity deviations ΔηΔη, have been calculated due to their importance in the study of specific molecular interactions. The observed negative and positive values of deviation/excess parameters were explained on the basis of the intermolecular interactions occur in these mixtures. The Perturbed Chain Statistical Association Fluid Theory (PC-SAFT) has been used to correlate the volumetric behavior of the mixtures.

Figure optionsDownload as PowerPoint slideExperimental and calculated partial molar volumes (V¯m,1) of MIK with (♦) 2-PrOH, (♢) 2-BuOH, (●) 2-PenOH at T = 298.15 K. (—) PC-SAFT model.