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Thermophysical properties of biodiesel fuels from modified Perturbed Hard Trimer Chain equation of state
Negar Parvizi, Falamarz Akbari, Mohammad Mehdi Alavianmehr and Delara Mohammad-Aghaie

In the present study, a modified version of the Perturbed Hard Trimer Chain equation of state was employed to predict thermophysical properties of fatty acid methyl ester (FAME) and fatty acid ethyl ester (FAEE) systems. The thermophysical properties in question are liquid density, vapor pressure, heat capacity, viscosity and thermal conductivity. The predictive power of the model has been assessed by calculating the aforementioned thermophysical properties and comparing with experimental ones as well as other models. Typically, the overall average absolute relative deviation (AARD in %) of the predicted densities for 1665 data points was found to be 2.57%. Simplicity and good agreement between the experimental data and those calculated from the present model, are the reasons for applicability of proposed model with sufficient accuracy for engineering applications. The capability of this new equation of state in predicting both thermodynamic and transport properties simultaneously with good accuracies is really prominent.

Keywords: Biodiesel, PHTC EOS, thermodynamic properties, transport properties, Fatty methyl acid esters, Fatty ethyl acid esters

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