title: Ultrasound-assisted production of biodiesel fuel from vegetable oils in a small scale circulation process.
abstract: Biodiesel production from canola oil with methanol was performed in the presence of a base-catalyst by a circulation process at room temperature. In this process, the transesterification was accelerated by ultrasonic irradiation of low frequency (20 kHz) with an input capacity of 1 kW. The influences of various parameters on the transesterification reaction, including the amount of catalyst, the molar ratio of methanol to oil and the reaction time, were investigated. The objective of this work was to produce biodiesel satisfying the biodiesel-fuel standards of low energy consumption and material savings. The optimal conditions were: methanol/oil molar ratio of 5:1 and 0.7 wt.% catalyst in oil. Under these conditions, the conversion of triglycerides to fatty acid methyl esters was greater than 99% within the reaction time of 50 min. Crude biodiesel was purified by washing with tap water and drying at 70 degrees C under reduced pressure.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
authors.forename: Le Tu
authors.initials: le T
authors.lastname: Thanh
authors.forename: Kenji
authors.initials: K
authors.lastname: Okitsu
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Sadanaga
authors.forename: Norimichi
authors.initials: N
authors.lastname: Takenaka
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Maeda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Bandow
mesh_terms: D056804:Biofuels; D002384:Catalysis; D004951:Esterification; D007700:Kinetics; D010938:Plant Oils / Q000737:chemistry*; D014465:Ultrasonics
chemical_list: D056804:Biofuels; D010938:Plant Oils