Variables affecting the yields of methyl esters derived from in situ esterification of rice bran oil

Articles

Abstract

The influence of specific factors on in situ methanolic esterification of rice bran oil (RBO) using sulfuric acid catalyst was investigated. using high-FFA rice bran was found to be the most effective means to increase methyl ester yields. The ester content of the extract increased about 67% when the FFA content of oil was increased from 16.6 to 84.5%. Increasing the reaction time beyond 30 min did not affect yields. Increasing the temperature from 20 to 65°C elevated the FAME yield by about 30%, but increasing the amount of acid catalyst above 5 mL did not enhance yield, and increasing the methanol dose from 200 to 250 mL had a negligible effect.

Key Words

Esterification fatty acid fatty acid methyl esters in situ esterification rice bran rice bran oil 

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References

  1. 1.
    Kaufman, A.J., and R.J. Ruebusch, Keynote Speech: Oleochemicals: A World Overview, in World Conference on Oleochemicals into the 21st Century, edited by T.H. Applewhite, American Oil Chemists' Society, Champaign, 1991, pp. 10–25.Google Scholar
  2. 2.
    Krawzcyk, T., Biodiesel Still Awaiting Full Acceptance, inform 7:1320–1326 (1996).Google Scholar
  3. 3.
    Haas, M.J., and K.M. Scott, Combined Nonenzymatic-Enzymatic Method for the Synthesis of Simple Alkyl Fatty Acid, Esters from Soapstock, J. Am. Oil Chem. Soc. 73:1393–1401 (1996).CrossRefGoogle Scholar
  4. 4.
    Kalayasiri, P., N. Jeyashoke, and K. Krisnangkura, Survey of Seed Oils for Use as Diesel Fuels, Ibid. 73:471–474 (1996).Google Scholar
  5. 5.
    Nelson, L.A., T.A. Foglia, and W.N. Marmer, Lipase-Catalyzed Production of Biodiesel, Ibid. 73:1191–1195 (1996).CrossRefGoogle Scholar
  6. 6.
    Harrington, K.J., and C. D'Arcy-Evans, Transesterification in situ of Sunflower Seed Oil, Ind. Eng. Chem. Prod. Res. Dev. 24: 314–318 (1985).CrossRefGoogle Scholar
  7. 7.
    Harrington, K.J., and C. D'Arcy-Evans, A Comparison of Conventional and in situ Methods of Transesterification of Seed Oil from a Series of Sunflower, Cultivars, J. Am. Oil Chem. Soc. 62:1009–1013 (1985).CrossRefGoogle Scholar
  8. 8.
    Özgül, S., and S. Türkay, In situ Esterification of Rice Bran Oil with Methanol and Ethanol, Ibid. 70:145–147 (1993).Google Scholar
  9. 9.
    Kildran, G., S.Ö. Yücel, and S. Türkay, S., In situ Alcoholysis of Soybean Oil, Ibid. 73:223–225 (1996).Google Scholar
  10. 10.
    Paquot, C., and A. Hautfenne, Standard Methods for the Analysis of Oils Fats and Derivatives, 7th edn., Blackwell Scientific Publications, Oxford, 1987, pp. 73–77.Google Scholar
  11. 11.
    Stahl, E., Thin-Layer Chromatography, Academic Press, New York, 1965, pp. 147–164.Google Scholar
  12. 12.
    Paquot, C., and A. Hautfenne, Standard Methods for the Analysis of Oils Fats and Derivatives, 7th edn., Blackwell Scientific Publications, Oxford, 1987, pp. 143–148.Google Scholar

Copyright information

© AOCS Press 2002

Authors and Affiliations

  1. 1.Chemical Engineering DepartmentIstanbul Technical UniversityMaslak, IstanbulTurkey

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