Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

Synthesis and Characterization of Soybean-based Ester Insulation Oils

대두유 에스테르계 절연유의 합성과 분석

  • 한동희 (한국전기연구원 재료응용연구단) ;
  • 조한구 (한국전기연구원 재료응용연구단) ;
  • 한세원 (한국전기연구원 재료응용연구단) ;
  • 오대희 (부경대학교 공업화학과)
  • Published : 2006.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

Electrical insulation is one of the most important parts in a high voltage apparatus. Traditionally mineral oils and synthetic esters have been widely used as dielectric coolants for power transformers. Recently, researchers are interested in the environmentally friendly vegetable oil from the environmental viewpoint. This paper reports on the synthesis and characterization of soybean based ester oils. Two different types of soybean based transformer oils, named as methyl ester and isopropyl ester were synthesized. The synthesis of these esters was achieved by transesterification reactions between soybean oil and alcohol in the presence of catalyst. The GC and NMR spectroscopic analysis of the esters have been performed. It was observed that isopropyl ester has better thermal resistance than methyl ester by TGA. Also, two esters have a good breakdown voltage and electrical resistance.

Keywords

References

  1. F. M. Clark, 'Insulating Materials for Design and Engineering Practice', New York: Wiley, 1962
  2. 'PCB Regulations', U. S. Environmental Protection Agency, Public Law 94-469, 1976
  3. 'Disposal of Polychlorinated Biphenyls (PCB's)', U. S. Environmental Protection Agency, 40 CFR, Federal Register, p. 750, 1998
  4. E. Earley, 'Minimizing the hazards of transformer fires', Fire J., p. 73, 1988
  5. D. A. Hallerberg, 'Less-flammable liquids used in transformers', IEEE Ind. Applicat. Mag., Vol. 5, p. 50, 1999 https://doi.org/10.1109/2943.740759
  6. C. P. McShane, 'New safety dielectric coolants for distribution and power transformers', IEEE Ind. Applicat. Mag., p. 24, 2000
  7. C. P. McShane, K. J. Rapp, J. L. Corkran, G. A. Gauger, and J. Luksich, 'Aging of paper insulation in natural ester dielectric fluid', IEEE/PES, Vol. 2, p. 675, 2001
  8. C. P. McShane, 'Relative properties of the new combustion-resistant vegetable-oil-based dielectric coolants for distribution and power transformers', IEEE Trans. on Ind. Applica., Vol. 37, No.4, p. 1132, 2001 https://doi.org/10.1109/28.936406
  9. T. V. Oommen, 'Vegetable oils for liquidfilled transformers', IEEE Electrical Insul. Mag., p. 6, 2002
  10. B. Freedman, E. H. Pryde, and T. L. Mounts, 'Variables affecting the yields of fatty esters from transesterification vegetable oils', JAOCS, Vol. 61, p. 1638, 1984
  11. J. Otera, 'Transesterification', Chem. Rev., Vol. 93, p. 1449, 1993
  12. B. Freedman, R. O. Butterfield, and E. H. Pryde, 'Transesterification kinetics of soybean oil', JAOCS, Vol. 63, p. 1375, 1986
  13. H. Noureddini and D. Zhu, 'Kinetics of transesterification of soybean oil', JAOCS, Vol. 74, p. 1457, 1997
  14. F. Li, M. V. Hansen, and R. C. Larock, 'Soybean oil divinylbenzene thermosetting polymers : Synthesis, structure, properties and their relationship', Polymer, Vol. 43, p. 1567, 2001
  15. C. J. Pouchert and J. Behnke, 'The Aldrich Library C and H FT NMR Spectra', Ed. 1, Aldrich Chemical Company Inc., 1993
  16. L. R. F. Johnson and W. C. Jankowski, 'Carbon-13 NMR Spectra', Wiley-Interscience, New York, 1992
  17. C. L. Peterson, D. L. Auld, and R. A. Korus, 'Winter rape oil fuel for diesel engines: Recovery and utilization', JAOCS, Vol. 60, p. 1579, 1983