An empirical approach for predicting biodiesel fuels dynamic viscosity from their fatty acid ester composition at various temperatures
Abstract
The purpose of this work was to develop an empirical model for predicting temperature dependent dynamic viscosities of biodiesel, based on their fatty acid ester composition. The Vogel equation [1] was used to describe the viscosity-temperature relationship of pure fatty acid esters (FAME-Fatty acid methyl ester/FAEE-Fatty acid ethyl ester) commonly present in biodiesel fuels, and a modified mass fraction based mixing equation was used to predict viscosity of 47 biodiesel mixtures based on their FAME/FAEE composition. The accuracy of this simple method was better than the other mass-based semilog blending equation reported in the literature.
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