Volumetric and Viscometric Study of 1-Hexanol-Based Binary Systems: Experimental Determination and Modeling

Abstract

Density, viscosity, and refractive index of four binary mixtures with 1-hexanol are experimentally determined at seven temperatures, in the temperature range from 288.15 to 318.15 K and at atmospheric pressure. The choice of mixtures was based on their potential for applications in flue gas cleaning processes. From experimental data, excess molar volume, viscosity deviation, excess molar Gibbs free energy of activation of viscous flow, deviation in refractive index, and partial and excess partial molar volumes are calculated, correlated with the Redlich-Kister equation, and used for better understanding of molecular interactions between the mixture components. Since the mixtures were investigated both from the theoretical point of view and with the aspect for practical applications, modeling of two key properties, viscosity and excess molar volume, was performed with different models and approaches and the results are compared with experimental values.