Non-conventional oils for biodiesel production: a study of thermal and oxidative stability |
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Authors: | Maria Andrea Mendes Formiga Melo Marco Aurélio Rodrigues de Melo Andrea Suame Gouvea Costa Pontes Ana Flávia Félix Farias Manoel Barbosa Dantas Clediana Dantas Calixto Antonio Gouveia de Souza José Rodrigues de Carvalho Filho |
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Institution: | 1. LACOM, CCEN, Departamento de Química, Universidade Federal da Paraíba, Campus I, Jo?o Pessoa, PB, 58059-900, Brazil 2. Unidade Acadêmica de Química, Instituto Federal de Educa??o Ciência e Tecnologia da Paraíba, Campus Sousa, Sousa, PB, CEP 58800-970, Brazil
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Abstract: | Vegetable oils with variable proportions of oleic, linoleic, and linolenic acids are more susceptible to oxidative processes. In this subject, this study evaluates the physical chemical properties and oxidative stability of non-conventional oils such as andiroba, babassu, sesame, oiticica, jatropha, and grape through accelerated oxidation techniques (pressurized differential scanning calorimetry, Rancimat and PetroOxy). It was verified that babassu and andiroba oil do not showed detectable induction period presenting high oxidative stability; moreover, it was observed that the enthalpic events occurred in 1.19, >10, 0.53, 0.49, 0.49, and 0.60 h for the andiroba oil, babassu oil, sesame seeds, jatropha, oiticica oils, and grapes, respectively, stimulating the conclusion of greater stability for the babassu oil. |
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