TITLE:
Biodiesel Production from Unrefined Rice Bran Oil through Three-Stage Transesterification
AUTHORS:
V. R. Kattimani, B. M. Venkatesha, S. Ananda
KEYWORDS:
Biodiesel, Ricebran Oil, Free Fatty Acid, Transesterification
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.4 No.3,
July
16,
2014
ABSTRACT: Unrefined rice bran
oil (UNRFRBO) with high free fatty acids (FFA) is used as a source for the production
of unrefined rice bran oil methyl ester (UNRFRBOME). Three-stage transesterification
process is successfully used. Initially, the FFA of UNRFRBO is reduced to 1%
(0.8%) by using two stages esterification process with methanol in the presence
of acid (H2SO4) as a catalyst. Finally, biodiesel has
produced by alkaline (NaOH) catalyzed transesterification process which has designed
according to the central composite design. 90% has obtained at the optimum values
of CH3OH (20% v/v of oil), NaOH (1.0% w/v of oil), reaction time (60
minutes) and reaction temperature (55°C to 60°C).