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Densities and Viscosities of Fatty Acid Methyl and Ethyl Esters
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| To develop reliable models for the densities and viscosities of biodiesel fuel, reliable data for the pure fatty acid esters are required. Densities and viscosities were measured for seven ethyl esters and eight methyl esters, at atmospheric pressure and temperatures from (273.15 to 363.15) K. A critical assessment of the measured data against the data previously available in the literature was carried out. It is shown that the data here reported presents deviations of less than 0.15 % for densities and less than 5 % for viscosities. Correlations for the densities and viscosities with temperature are proposed. The densities and viscosities of the pure ethyl and methyl esters here reported were used to evaluate three predictive models. The GCVOL group contribution method is shown to be able to predict densities for these compounds within 1 %. The methods of Ceriani and Meirelles (CM) and of Marreiro and Gani (MG) were applied to the viscosity data. It is shown that only the first of these methods is able to provide a fair description of the viscosities of fatty acid esters. | 211.41 KB | Adobe PDF |
Orientador(es)
Resumo(s)
To develop reliable models for the densities and viscosities of biodiesel fuel, reliable data for the pure fatty acid esters are required. Densities and viscosities were measured for seven ethyl esters and eight methyl esters, at atmospheric pressure and temperatures from (273.15 to 363.15) K. A critical assessment of the measured data against the data previously available in the literature was carried out. It is shown that the data here reported presents deviations of less than 0.15 % for densities and less than 5 % for viscosities. Correlations for the densities and viscosities with temperature are proposed. The densities and viscosities of the pure ethyl and methyl esters here reported were used to evaluate three predictive models. The GCVOL group contribution method is shown to be able to predict densities for these compounds within 1 %. The methods of Ceriani and Meirelles (CM) and of Marreiro and Gani (MG) were applied to the viscosity data. It is shown that only the first of these methods is able to provide a fair description of the viscosities of fatty acid esters.
Descrição
Fonte: https://path.web.ua.pt/file/je100042c.pdf
Palavras-chave
Acids Atmospheric pressure Esterification Fatty acids Synthetic fuels Viscometers Viscosity
Contexto Educativo
Citação
Maria Jorge Pratas, Samuel Freitas, Mariana B. Oliveira, Sílvia C. Monteiro, Alvaro S. Lima, and João A. P. Coutinho. Journal of Chemical & Engineering Data. 2010, 55(9), pp. 3983-3990. DOI: https://doi.org/10.1021/je100042c.
Editora
American Chemical Society