Evolution of oxidation in soybean oil and its biodiesel under the conditions of the oxidation stability test

Authors

  • G. G. Pereira Fats and Oils Laboratory, Faculty of Food Engineering, University of Campinas (UNICAMP)
  • S. Marmesat Instituto de la Grasa (CSIC)
  • D. Barrera-Arellano Fats and Oils Laboratory, Faculty of Food Engineering, University of Campinas (UNICAMP)
  • M. C. Dobarganes Instituto de la Grasa (CSIC)

DOI:

https://doi.org/10.3989/gya.036913

Keywords:

Acid value, Anisidine value, Biodiesel, Oxidation, Peroxide value, Polar compounds, Soybean oil, Tocopherols, Viscosity

Abstract


The objective of this study was to know the evolution of the oxidation of soybean oil and biodiesel under the conditions of the oxidation stability test (110 °C) using the Rancimat apparatus. Samples were analyzed at different periods of time until the end of the induction period. The analytical determinations related to the changes in oxidation include peroxide value, anisidine value, natural tocopherols and polar compounds. Acid value, kinematic viscosity, polymers and ester content were also analyzed because of their relevance in the evaluation of biodiesel quality. Results showed that only peroxide value and the group of polar compounds including hydroperoxides, i.e. oxidized monomeric TAG in the oil and oxidized monomeric FAME in the biodiesel increased significantly during the early oxidation stage. The end of the induction period was marked by a rapid increase in polymerization compounds and the exhaustion of tocopherols. Significant changes in acid value, viscosity and ester content were only observed after the end of the induction period.

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References

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Published

2013-12-31

How to Cite

1.
Pereira GG, Marmesat S, Barrera-Arellano D, Dobarganes MC. Evolution of oxidation in soybean oil and its biodiesel under the conditions of the oxidation stability test. Grasas aceites [Internet]. 2013Dec.31 [cited 2024Mar.29];64(5):482-8. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1454

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