Densities and Viscosities of Minority Fatty Acid Methyl and Ethyl Esters Present in Biodiesel
authors Pratas, MJ; Freitas, S; Oliveira, MB; Monteiro, SC; Lima, AS; Coutinho, JAP
nationality International
journal JOURNAL OF CHEMICAL AND ENGINEERING DATA
keywords SURFACE-TENSION; OIL; FUELS; TEMPERATURE
abstract Biodiesels have several known components in their composition. The majority of components is well described in the literature, but a minority of components are poorly characterized. These are however required to develop reliable models to predict the biodiesel behavior. This work considers minor components of biodiesel: the polyunsaturated compounds (in C18), the monounsaturated (in C16, C20, and C22), and the long-chain saturated esters. In this work, densities and viscosities of pure fatty acid ester minor components of biodiesel fuel were measured (three ethyl esters and seven methyl esters), at atmospheric pressure and temperatures from (273.15 to 373.15) K. Correlations for the densities and viscosities with temperature are proposed. Three predictive models were evaluated in the prediction of densities and viscosities of the pure ethyl and methyl esters here reported. The GCVOL group contribution method is shown to be able to predict densities for these compounds within 1.5 %. The methods of Ceriani et al. (CM) and of Marrero et al. (MG) were applied to the viscosity data. The first show a better predictive capacity to provide a fair description of the viscosities of the minority esters here studied.
publisher AMER CHEMICAL SOC
issn 0021-9568
year published 2011
volume 56
issue 5
beginning page 2175
ending page 2180
digital object identifier (doi) 10.1021/je1012235
web of science category Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
subject category Thermodynamics; Chemistry; Engineering
unique article identifier WOS:000290427200060
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journal impact factor 2.196
5 year journal impact factor 2.331
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