Modeling of thermodynamic properties of an oxygenate + aromatic hydrocarbon: Excess molar enthalpy

•The HmE data of 1-propanol + aromatic hydrocarbons were measured using flow microcalorimeter.•Measured HmE data of 1-propanol + aromatic hydrocarbons were interpreted in terms of Graph theory and PFP theory.•The calculated HmE (PFP) values compared reasonably well with experimental data for x1>0.5.•The experimental HmE data compared well with their Graph theory values.•The experimental HmE data were correlated with Redlich–Kister polynomial.

Excess molar enthalpy (HmE) have been measured at 303.15 K for 1-propanol + benzene or toluene or o- or m- or p  -xylene mixtures using flow micro calorimeter. The HmE versus x1 plots are skewed toward y  -axis showing maxima at x1≈0.3x1≈0.3. At (x1=0.5)(x1=0.5)HmE vary in the order: toluene < benzene < m-xylene < p-xylene ∼ o  -xylene. The excess volume data have also been interpreted in terms of Graph-theoretical approach and Prigogine–Flory–Patterson theory. It has been observed that while PFP theory fails to predict the HmE values for these systems in the composition range x1<0.5x1<0.5, agreement with experimental values is reasonably good thereafter. The HmE values calculated by Graph theory compared well with the corresponding experimental values.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide