Physico-chemical Properties of the Pseudo-binary Mixture Gasoline + 1 - Butanol

Biobutanol can be a good biofuel candidate to contribute to CO2 reduction. Used as a direct substitute of gasoline or as a fuel additive, biobutanol is a better candidate than bioethanol due to its higher energy density and lower tendency to absorb water than ethanol. The properties of gasoline + biobutanol mixtures are very important because they influence production, transportation, and distribution processes as well as all processes that take place in the internal combustion engine. Densities, viscosities and refractive indices have been measured over the whole composition range for gasoline + 1 - butanol mixtures at T = (293.15, 298.15, 303.15, 313.15, and 323.15) K for density and viscosity and at 293.15 K for refractive index, and at atmospheric pressure. Based on experimental data, the accuracy of different equations has been tested to predict the density, viscosity, and refractive index of the pseudo-binary gasoline + 1 - butanol mixtures. Deviations in viscosity and refractive index have been calculated and fitted to the Redlich-Kister equation to obtain the regression coefficients and standard errors between experimental and calculated results. The experimental and calculated quantities are used to understand the behavior of investigated mixture of fuels.