Avaliação da acidez de óleo residual no rendimento do biodiesel

Abstract

Since the mid-twentieth century the world has been concerned about the shortage of fuels derived from oil, with the crisis of 1970 several countries were made aware of developing ways to obtain an alternative fuel and one of the forms was using raw material of vegetable origin and animal. Biodiesel emerged with a great expectation of viability from the economic and environmental point of view. Biodiesel can be defined as a monoester ester of fatty acids derived from renewable sources as the example of commercially used soybean oil. The objective of this work is to obtain biodiesel from the frying residual oil by means of alkaline transesterification and to evaluate the influence of the acidity of the frying residual oil on the Biodiesel yield, Testing the methyl route in the productive yield of mixtures of different concentrations of in natura soya oil and oil used in frying. Biodiesel from a fractional mixture of virgin oil and frying oil despite the high acidity showed a decreasing yield as the acidity increased. In addition, due to the raw material not having undergone previous treatments or washing procedures, which contributed to high amount of free fatty acids. However, it can be said that even with these factors, it is feasible to use the raw material provided there is a filtration to remove particulate matter.