Study of Density and Viscosity in Nonane and 2-Alkanol Mixtures: Experimental and PC-SAFT Approach

This study presents new experimental data on the density and viscosity of mixtures containing nonane and 2-alkanols (ranging from 2-propanol to 2-hexanol) at a pressure of 0.1 MPa and temperatures between 293.15 and 323.15 K. Molecular interactions between the components were investigated and found to be weak. Additionally, the predictive capability of the PC-SAFT equation of state was evaluated for density calculations. The binary interaction parameter, assumed constant over the temperature range, was fitted using experimental excess molar volume data at each temperature. The PC-SAFT model accurately predicted the experimental densities of the mixtures. Furthermore, two viscosity models were applied and accurately fitted to the experimental data.