Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The physical properties, density and viscosity, of 21 binary mixtures composed of 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, 1-decanol, 1-undecanol and 1-dodecanol were determined at temperatures from 298.15 to 338.15 K, stepped by 10 K. Well-known methods, based on the physical properties of the pure compounds and their compositions in the mixtures, were used to estimate density (simple form of Kay's rule) and viscosity (logarithmic form of Kay's rule). For density values, the absolute average deviations (AADs) were no higher than 0.06 % when mass fraction was used as the unit of concentration. The viscosity calculations resulted in overall AADs from 1.77 % (using molar fraction as the unit of concentration) to 1.85 % (using mass fraction as the unit of concentration). Additionally, the predictive capability of the UNIFAC-VISCO and GCUNIMOD models was tested for viscosity. Satisfactory results were found for all the sets of parameters evaluated in the prediction, with AAD values less than 2 %, indicating the appropriate application of this model.