Avaliação de variações de características físico-químicas de biodiesel de óleo de arroz durante o armazenamento

Abstract

The biodiesel production in Brazil has been growing annualy and, for it´s commercialization, this biofuel needs to meet certain quality parameters regulated by the National Agency of Petroleum, Natural Gas and Biofuels (ANP). Among these parameters that shows delimited values there are the acidity level, kinematic viscosity, water content and ester content. These parameters help to guarantee the quality of the biodiesel and the preservation of the vehicles that use them. One of the parameters that has been grabbing attention is the biodiesel oxidative stability, wich indicates the resistance of the sample to oxidation, and it varies according to the raw material utilized in the synthesis of the biodiesel. This oxidation of the biofuel, in general, happens in a slow way, but it can be accelerated by some factors, like high temperatures. This way, the present study proposed to produce biodiesel from rice bran oil through transesterification and to analyze it´s physical-chemical characteristics as a result of storage time and variation in light exposure.