title: Influence of fatty acid composition of raw materials on biodiesel properties.
abstract: The aim of this work was the study of the influence of the raw material composition on biodiesel quality, using a transesterification reaction. Thus, ten refined vegetable oils were transesterificated using potassium methoxide as catalyst and standard reaction conditions (reaction time, 1h; weight of catalyst, 1 wt.% of initial oil weight; molar ratio methanol/oil, 6/1; reaction temperature, 60 degrees C). Biodiesel quality was tested according to the standard [UNE-EN 14214, 2003. Automotive fuels. Fatty acid methyl esters (FAME) for diesel engines. Requirements and test methods]. Some critical parameters like oxidation stability, cetane number, iodine value and cold filter plugging point were correlated with the methyl ester composition of each biodiesel, according to two parameters: degree of unsaturation and long chain saturated factor. Finally, a triangular graph based on the composition in monounsaturated, polyunsaturated and saturated methyl esters was built in order to predict the critical parameters of European standard for whatever biodiesel, known its composition.
authors.affiliation: Departamento de Ingeniería Química, Instituto de Tecnología Química y Medioambiental, Universidad de Castilla-La Mancha, Ciudad Real, Spain. MariaJesus.Ramos@uclm.es
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Ramos
authors.forename: Carmen María
authors.initials: CM
authors.lastname: Fernández
authors.forename: Abraham
authors.initials: A
authors.lastname: Casas
authors.forename: Lourdes
authors.initials: L
authors.lastname: Rodríguez
authors.forename: Angel
authors.initials: A
authors.lastname: Pérez
mesh_terms: D004951:Esterification; D005227:Fatty Acids / Q000737:chemistry*; D005742:Gasoline / Q000032:analysis*; D008422:Materials Testing; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000737:chemistry*
chemical_list: D005227:Fatty Acids; D005742:Gasoline; D010938:Plant Oils