title: Influence of vegetable oils fatty-acid composition on biodiesel optimization.
abstract: Biodiesel is an alternative fuel for diesel engines produced through transesterification of oleaginous feedstocks. To analyze the influence of the fatty-acid composition on biodiesel optimization, transesterification of several vegetable oils has been studied. Reactions were carried out in flasks filled with vegetable oils, heated to the reaction temperature and stirred at 1100 rpm. The reactions started when the methanol and potassium hydroxide solutions were added to the flasks. Concentration of catalyst, amount of methanol, reaction temperature and time were optimized using a factorial design and a surface response design. Also, a kinetics study was carried out to optimize the reaction time. Results showed that reaction parameters optimal values depend on the oil chemical and physical properties. It can be concluded from this field trial that the effect of both catalyst concentration and reaction time over the transesterification yield is greatly influenced by the saturation degree and fatty-acid chain length.
authors.affiliation: Department of Chemical Physics and Applied Thermodynamics, EPS, Edificio Leonardo da Vinci, Campus de Rabanales, Universidad de Cordoba, 14071 Cordoba, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Pinzi
authors.forename: J M
authors.initials: JM
authors.lastname: Mata-Granados
authors.forename: F J
authors.initials: FJ
authors.lastname: Lopez-Gimenez
authors.forename: M D
authors.initials: MD
authors.lastname: Luque de Castro
authors.forename: M P
authors.initials: MP
authors.lastname: Dorado
mesh_terms: D000704:Analysis of Variance; D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000379:methods*; D004951:Esterification; D005227:Fatty Acids / Q000032:analysis*; D016014:Linear Models; D010938:Plant Oils / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors
chemical_list: D056804:Biofuels; D005227:Fatty Acids; D010938:Plant Oils