A Highly Stable Soybean Oil-Rich Miscella Obtained by Ethanolic Extraction as a Promising Biodiesel Feedstock

Autor(es)

Bueno-Borges, Larissa Braga ; de Camargo, Adriano Costa ; Sangaletti-Gerhard, Naiane ; Pereira dos Santos, Grasiela Cristina ; de Alencar, Severino Matias ; Shahidi, Fereidoon ; Bismara Regitano-d'Arce, Marisa Aparecida

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY; v. 94, n. 8, p. 1101-1109, AUG 2017.
• Citações Web of Science: 1

Resumo

Soybean oil is industrially obtained upon hexane extraction. In biodiesel production, soybean oil is submitted to phospholipid removal in order to improve its quality before transesterification. An extraction process was employed to produce ethanolic oil-rich miscella, which can be directly transesterified to produce biodiesel without prior refining. We assessed the oxidative stability of the miscella and three other soybean oils, namely degummed, alkali-refined, and refined-bleached-deodorized (RBD) oil. In vitro antioxidant assays as well as the identification and quantification of tocopherols and isoflavones were also performed. Although hexane-extracted oils showed higher tocopherol contents than miscella, this latter sample and its direct biodiesel demonstrated superior stability in accelerated tests. Miscella also outperformed hexane-extracted oils in all in vitro assays. This behavior can be explained by the presence of phenolic compounds with higher affinity to ethanol than hexane, which was confirmed by the identification of isoflavones glycitein, genistein, and acetyldaidzin, found only in miscella. This study showed that the ethanolic extraction of soybean oil generated a highly stable lipid feedstock for biodiesel manufacture. (AU)

• Processo FAPESP: 12/17683-0 - Radiação gama como ferramenta de segurança microbiológica em resíduos agroindustriais e seu efeito nas propriedades antioxidantes avaliadas por testes in vitro e sistemas modelo
• Beneficiário: Adriano Costa de Camargo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/00336-4 - Extração assistida por enzimas aplicada a compostos fenólicos insolúveis de subprodutos da uva: potencial antioxidante e bioativide
• Beneficiário: Adriano Costa de Camargo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 16/01956-9 - 107th AOCS Annual Meeting & Expo
• Beneficiário: Marisa Aparecida Bismara Regitano d'Arce
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior
• Processo FAPESP: 13/03650-6 - Aplicação de catalisadores químicos heterogêneos na transesterificação de miscela etanólica de óleo de soja
• Beneficiário: Marisa Aparecida Bismara Regitano d'Arce
• Modalidade de apoio: Auxílio à Pesquisa - Regular