Energy Science and Technology
UV-Visible Spectroscopy Study of Oxidative Degradation of Sunflower Biodiesel
Abstract
In this study, three antioxidants (blend (hydrogenated cardanol + 5-n-pentadecyl-2-tert-butylphenol), 5-n-pentadecyl-2-tert-butylphenol and ionol BF200) were evaluated for their potential to reduce the degree of oxidation of sunflower biodiesel under thermal stress condition. Each antioxidant was added at a concentration of 1000 ppm. The oxidative degradation was investigated by UV-visible spectroscopy and iodometry were used to monitor the changes using peroxide values. The results showed that, blend and 5-n-pentadecyl-2-tert-butylphenol possess significant potentiality when compared with ionol BF200. The blend and 5-n-pentadecyl-2-tert-butylphenol reduced the absorbance around 31%. The peroxide value showed that, the formulations: sunflower biodiesel/A2, sunflower biodiesel/A3 and sunflower biodiesel/AC showed better results when compared with sunflower biodiesel without antioxidant.
Keywords: Antioxidants; Peroxide value; Accelerated oxidation test
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DOI: http://dx.doi.org/10.3968/j.est.1923847920110202.112
DOI (PDF): http://dx.doi.org/10.3968/g2089
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