Journal of Molecular Liquids | 2019
Volumetric and acoustic properties of fuel additive oxygenate with hydrocarbons
Abstract
Abstract Densities and speed of sound for the binary mixture of diisopropyl ether (DIPE) (1)\xa0+\xa0toluene, n-octane (2) and toluene (1)\xa0+\xa0n-hexane, n-heptane, n-octane (2) and n-hexane, n-heptane (1)\xa0+\xa0n-octane (2) were measured from 298.15\xa0K to 318.15\xa0K. The measured data were used to calculate excess molar volume VmE, deviation in ultrasonic speed Δu, excess isentropic compressibility KsE, excess intermolecular free length LfE and excess available volume VaE. For theoretical interpretation of VmE values, Prigogine-Flory-Patterson theory and Graph theory were applied at 298.15\xa0K. Ultrasonic speed data were predicted at 298.15\xa0K using various empirical correlations like Nomoto, Van Dael, Impedance dependence and also by Schaaff s collision factor theory. The temperature effect on KsE and VmE was also discussed. The results were analyzed in the light of unlike interactions, packing effect, cohesion forces and change in orientation order.