Excess Molar Volume, Viscosity and Refractive Index for Binary Mixtures of Methyl Laurate with n-Octane, Iso-Octane or Ethyl Cyclohexane

Three C8 alkanes ( n -octane, iso -octane and ethyl cyclohexane) as additives were blended with methyl laurate to prepare binary systems of fuel blends for density, viscosity and refractive index measurement. The excess properties of volumes and viscosity of the three binary systems (methyl laurate +  n -octane), (methyl laurate +  iso -octane) and (methyl laurate + ethyl cyclohexane) were obtained and compared, which were also fitted to Redlich–Kister equation. The correlated values from Redlich–Kister equation are in good agreement with those from experimental data. The results can be used for the research of the mixture behaviors and development of biodiesel-diesel fuel blends.