Thermodynamics of ternary mixtures with gasoline additive: Volumetric, acoustic and optical properties

Abstract

Abstract Excess molar volume (VmE), deviation in ultrasonic speed (Δu) and deviation in refractive index (Δn) of ternary mixtures with gasoline additives diisopropyl ether (DIPE) + benzene + n-heptane were derived from the measured density, ultrasonic speed and refractive index with Anton Paar vibrating tube densimeter, sound analyzer and Abbemat 200 refractometer, respectively at different temperature of 298.15 K, 308.15 K and 318.15 K and atmospheric pressure. The VmE values for the ternary mixtures were predicted using pragmatic equations and geometrical solution models employing constituent binary data. The VmE have also been interpreted using Prigogine-Flory-Patterson theory. The ultrasonic speed data was analyzed using like Nomato, van Dael, impedance dependence correlations and CFT theory at 298.15 K. Jacobson free length theory was employed to compute LfE and VaE at 298.15 K. The refractive indices of the ternary mixtures were also predicted using various mixing rules. The VmE,Δu, KSE and Δn derived values were also fitted to the Singh equation.