Thermodynamics of ternary mixtures of oxygenated fuel: Diisopropyl ether + ethanol + n-octane

Abstract

Depleting conventional fossil fuels and growing greenhouse gases have fascinated the researcher’s heed for the use of green and clean fuels. Thereby, such fuels can be obtained by blending gasoline with the oxygenated fuel additives to reduce the toxic gaseous emissions and enhance the fuel efficiency in the motor engine. In this regard, various thermodynamic properties like densities (ρ), speeds of sound (u) and refractive indices (nD) of the ternary mixture of diisopropyl ether (1) + ethanol (2) + n-octane (3) were experimentally measured at different temperatures (298.15 K to 318.15 K) and at 0.1 MPa. The excess molar volume (VmE), deviation in sound speed (Δu), excess isentropic compressibility (κsE), excess available volume (VaE), excess free length (LfE) and refractive index deviation were evaluated using their corresponding experimental data. Different correlations and analytical rules have been used for conceptual assessment of speed of sound and refractive index of mixtures. The effect of temperature on the above stated thermodynamics properties has also been investigated.