Volumetric property for tankage of biodiesel from residual oil

Abstract

The recycling of frying oil for biodiesel production not only removes an undesirable compound of the environment, but it also allows the generation of an alternative energy source to petroleum derivatives, renewable and less pollutant. A physical property known as the coefficient of volumetric expansion is important to fuel tankage and is determined for diesel and biodiesel of residual oil obtained by the basic homogeneous catalysis. This study aims to determine this expansion coefficient from experimental data of specific mass as a function of temperature of methylic and ethylic biodiesel of residual oil and compare it with diesel. All physical-chemistry properties analyzed are in accordance with specification from Brazil. The coefficient of volumetric expansion for diesel oil, ethylic and methyl biodiesel are 8.36 × 10 -4 oC-1, 8.37 × 10-4 oC-1 and 8.35 × 10-4 oC-1, respectively, and the values were found with 95% confidence. Statistical data show an excellent correlation of the linear model with experimental values. Variation in the coefficient of expansion implies in different intensities of intermolecular interactions.