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).
References
[1]
Ju, Y.-H. and Vali, S.R. (2005) Rice Bran Oil as a Potential Resource for Biodiesel: A Review. Journal of Scientific and Industrial Research, 64, 866-882.
[2]
Freedman, B., Pryde, E.H. and Mounts, T.L. (1984) Variables Affecting the Yields of Fatty Esters from Transesterified Vegetable Oil. Journal of American oil Chemist Society, 61, 1638-1643.
[3]
Kusy, P.G. (1982) Transesterification of Vegetable Oils for Fuels. Proceedings of International Conference on Plants and Vegetable Oils as Fuel, Fargo North Dakota, 2-4 August 1982, 127-137.
[4]
Knothe, G., Dunn, R.O. and Bagby, M.O. (1997) The Use of Vegetable Oils and Their Derivatives as Alternative Diesel Fuels. In: Saha, B.C. and Woodward, J., Eds., Fuels and Chemicals from Biomass, American Society, Washington DC, 172-2008. http://dx.doi.org/10.1021/bk-1997-0666.ch010
[5]
Lin, L., Ying, D., Chaitep, S. and Vittayapadung, S. (2009) Biodiesel Production from Crude Rice Bran Oil and Properties as Fuel. Applied Energy, 86, 681-688. http://dx.doi.org/10.1016/j.apenergy.2008.06.002
[6]
Goff, M.J., Bauer, N.S., Lopes, S., Sutterlin, W.R. and Suppes, G.J. (2004) Acid-Catalyzed Alcoholysis of Soybean Oil. Journal of the American Oil Chemists’ Society, 81, 415-420.
