z-logo
open-access-imgOpen Access
Analysis of used frying fats for biodiesel production
Author(s) -
Ma Victoria Ruiz Méndez,
Susana Marmesat,
Andrea Liotta,
M. C. Dobarganes
Publication year - 2008
Publication title -
grasas y aceites
Language(s) - Spanish
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 46
eISSN - 1988-4214
pISSN - 0017-3495
DOI - 10.3989/gya.2008.v59.i1.489
Subject(s) - biodiesel , food science , biodiesel production , pulp and paper industry , production (economics) , chemistry , environmental science , business , organic chemistry , economics , engineering , catalysis , macroeconomics
6 pages, 2 tables, 3 figures.[EN] Used frying fats and oils with highly variable and uncontrolled quality are used for the production of biodiesel. The objective of this study was to define the analytical methods useful to obtaining information on the quality of the used frying oils as raw material for biodiesels as well as for the characterization of the biodiesels obtained from them. Twentyfour used frying oils from restaurants and domestic fryers were analyzed before and after transesterification to fatty acid methyl esters (FAME). From a detailed analysis of the samples by means of a combination of adsorption and size exclusion\udchromatography, the quantitative importance of polymeric compounds was deduced both from the direct analysis of the oils and from their FAME. Excellent linear correlation between polar compounds and polar FAME (R 0.9768) was found. The possibilities of interferences from polar fatty acid in the\udstandard method to determine the ester content are defined. Finally, determination of non-polar FAME by silica column is\udproposed as a good alternative to the gas chromatography method.[ES] Los aceites y grasas de fritura, que se caracterizan por tener una calidad muy variable, se utilizan como material prima para la producción de biodiesel. El objetivo de este estudio es definir la utilidad de los métodos analíticos desarrollados para los aceites y grasas de fritura para caracterizar el biodiesel obtenido. Veinticuatro aceites de fritura procedentes del sector de restauración y de fritura doméstica fueron analizados antes y después de su transesterificación a ésteres metílicos de ácidos grasos. A partir de un análisis detallado mediante cromatografías de adsorción y exclusión, se deduce la importancia cuantitativa de los compuestos de polimerización tanto en el análisis directo de los aceites como en el análisis de los ésteres metílicos. Se encontró una excelente correlación lineal entre los compuestos polares y los ésteres metílicos polares (R=0.9768). Se definen las interferencias de los compuestos formados durante la fritura en el análisis estándar para conocer la calidad del biodiesel y se propone la determinación de ésteres metílicos no polares como una buena alternativa a la determinación cromatográfica estándar.This research work was supported by Junta de\udAndalucía and MCYT (Project AGL 2004-00148).Peer reviewe

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here