Avaliação dos parâmetros de biodiesel e blendas durante armazenamento

Abstract

The study aimed to synthesize, store and monitor the biodiesel from the homogeneous alkaline transesterification of soybean and castor oil via methyl route, as well as evaluating the oxidative induction by the standard EN14112 and the PetroOxy basis over the period of 120 days. We observed the behavior of biodiesel blends inserted in the proportions of 20, 30, 40 and 50% v/v biodiesel from castor biodiesel from soybeans called M20 , M30 , M40 and M50 (in closed containers carbon steel). As physicochemical analyzes, specifications for both biodiesel and blends met the requirements of the limits allowed by the Technical Regulation No. 14/2012 of the National Agency of Petroleum, Natural Gas and Biofuels (ANP), except for the analysis of oxidative stability (M0 , M20 , M30 and M40) , the index of acidity after 60 days (M50) , after 90 days (M40 and M50) after 120 days (M100) and kinematic viscosity (M40 , M50 and M100) that had values outside the limits set by the standard. The fluid-dynamic properties showed similar behavior for methyl biodiesel blends and thus these concentrations of methyl biodiesel acts as a natural castor oil to methyl soybean biodiesel additive. The cetane number (CN) was higher for methyl soybean biodiesel. As the storage time increases the cetane number of towers. These values follow the trend of the Rancimat oxidative stability and PetroOxy methods. By the method EN 14112 has been found that the M50 blend is more resistant to oxidation during storage for 120 days on storage conditions.