abstract
Speed of sound of fatty esters provides important information about biodiesel injection characteristics and enables the estimation of many other important properties of biodiesels. Nevertheless, the experimental speeds of sound of fatty esters are very scant. This work provides new data on speed of sound for nine fatty acid ethyl esters and four ethylic biodiesels, measured at atmospheric pressure and temperatures ranging from 293.15 to 343.15 K. These new data is used to evaluate the ability of the Wada's group contribution method to predict the biodiesel speed of sound. It is here shown that this model provides excellent description of the experimental data, with overall average relative deviations (OARDs) of 0.25% for the ethyl esters and between 0.45% and 0.59% for the biodiesels. (C) 2013 Elsevier Ltd. All rights reserved.
keywords
ISENTROPIC BULK MODULUS; DENSITY EXPERIMENTAL MEASUREMENTS; SURFACE TENSIONS; JATROPHA-CURCAS; METHYL-ESTERS; PRESSURE; COMPRESSIBILITY; TEMPERATURES; VISCOSITIES; MIXTURES
subject category
Energy & Fuels; Engineering
authors
Freitas, SVD; Santos, A; Moita, MLCJ; Follegatti-Romero, LA; Dias, TPVB; Meirelles, AJA; Daridon, JL; Lima, AS; Coutinho, JAP
our authors
acknowledgements
Samuel Freitas acknowledges a Ph.D Grant from Fundacaopara a Ciencia e a Tecnologia through his Ph.D grant (SFRH/BD/51476/2011), FundacaoOriente and also financial support from the University of Aveiro. CICECO is being funded by Fundacaopara a Ciencia e a Tecnologia through Pest-C/CTM/LA0011/2011. Antonio J.A. Meirelles acknowledges FAPESP (2008/56258-8) and CNPq (304495/2010-7; 483340/2012-0) for the financial support. Centro de Ciencias Moleculares e Materiais and Centro de Quimica e Bioquimica are grateful to Fundacao para a Ciencia e a Tecnologia for financial support under projects PEst-OE/QUI/UI0536/2011 and PEst-OE/QUI/UI0612/2011.