Authors:Luzia Patricia Fernandes Carvalho Galvão, Anne Gabriella Dias Santos, Amanda Duarte Gondim, Marcela Nascimento Barbosa, Antonio Souza Araujo, Luiz Di Souza, and Valter José Fernandes Junior
ethyl esters (the chemical name for biodiesel) [ 7 ]. Although the renewable origin and biodegradability of the biodiesel are widely presented as advantage, its decomposition profile confers to itself lower oxidativestability in comparison to mineral
Authors:R. A. Candeia, F. S. M. Sinfrônio, T. C. Bicudo, N. Queiroz, A. K. D. Barros Filho, L. E. B. Soledade, I. M. G. Santos, A. L. Souza, and A. G. Souza
oil stability index (OSI) of soybean oil fatty acid methyl esters (SME). On the other hand, antioxidant additives are commonly employed to improve the oxidativestability of biodiesel. Tang et al. [ 18 ] investigated the effectiveness of various
Authors:E. F. S. M. Ramalho, A. R. Albuquerque, A. L. Souza, A. K. Barro, A. S. Maia, I. M. G. Santos, and A. G. Souza
An important problem associated to commercial biodiesel acceptation is its low oxidativestability [ 1 ], which is determined by the nature of the fatty acid chains of oils or fats [ 2 ]. This fact can be evidenced
Authors:A. Vasconcelos, M. Dantas, M. Filho, R. Rosenhaim, E. Cavalcanti, N. Antoniosi Filho, F. Sinfrônio, I. Santos, and A. Souza
The influence of drying processes in the biodiesel oxidation was investigated by means of the oxidative induction time obtained
from differential scanning calorimetry data. For this purpose, corn biodiesel was dried by different methods including: chemical
(anhydrous sodium sulfate) and thermal (induction heating, heating under vacuum and with microwave irradiation). The drying
efficiency was evaluated by monitoring IR absorption in the 3,500–3,200 cm−1 range and by the AOCS Bc 2-49 method. In general, the oxidative induction times increased inversely to the heating degree,
except that of microwave irradiation, which was selective to water evaporation and caused low impact over the unsaturation
of biodiesel. The DSC technique was shown to be a powerful tool to evaluate with high level of differentiation the influence
of the drying process on the oxidative stability of biodiesel.
Authors:M. Karakuş, A. Bayrak, E. Çalikoğlu, and M. Kiralan
Kiralan , M., Bayrak , A. & Ozkaya , M.T. (2009): Oxidationstability of virgin olive oils from some important cultivars in East Mediterranean area in Turkey. J. Am. Oil Chem. Soc ., 86 , 247–252.
Authors:S. Cevik, G. Ozkan, M. Kiralan, and A. Bayrak
Gutiérrez, F., Jímenez, B., Ruíz, A. & Albi, M.A. (1999): Effect of olive ripeness on the oxidativestability of virgin olive oil extracted from the varieties Picual and Hojiblanca and on the different components involved. J. Agric. Fd Chem., 47, 121
The thin film oxidation resistance of isoparaffin and two polyol esters synthetic lubricants was studied by high pressure differential scanning calorimetry. The oxidation induction time of each lubricant was measured by isothermally heating the sample in an oxygen environment. Arrhenius plots were constructed to predict the service life of the lubricant at low temperatures. The results indicate that polyol esters exhibit better oxidative stability than isoparaffins.