Abstract
Fatty acid methyl ester (FAME) can be used both as an independent fuel and as a component for petrodiesels. Unfortunately, it is very poorly resistant to oxidation processes. The paper presents tests of primary and secondary oxidation products as a determinant of oxidation resistance. Based on changes in the peroxide number, the oxidation kinetics of the biofuel FAME was determined. In the present study, an increase in density and viscosity was observed, caused by the formation of polymer deposits resulting from the transformation of secondary oxidation products and the polymerization and polycondensation reactions of fatty acid esters containing a double bond. The measurement results show a direct relationship between the anisidine number and the peroxide number. The presence of water in the FAME samples accelerates the formation of primary and secondary oxidation products during the storage of the FAME in a steel container. The kinetics study revealed a change in the biofuel aging kinetics, which indicates the negative impact of storage time on fuel quality.
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