Wednesday, 2 September 2015

Yellow passion fruit (Passiflora edulis f. flavicarpa Deg.) oil refining extracted by mechanical pressing



Yellow passion fruit (Passiflora edulis f. flavicarpa Deg.) oil refining extracted by mechanical pressing
Julianna Karla Santana Andrade1, Lília Calheiros de Oliveira Barretto2, Gabriel Francisco da Silva3, João Antônio Belmino dos Santos4

1 Flavors Laboratory, Federal University of Sergipe, São Cristóvão
2 Graduate Program in Chemical and Biochemical Process Technology, Federal University of Rio de Janeiro, Rio de Janeiro
3 Alternative Technologies Laboratory, Federal University of Sergipe, São Cristóvão
4 Department of Food Technology, Federal University of Sergipe, São Cristóvão

Abstract Clarifiers clays are used in refinery operations of vegetable oils to remove pigments, improving their appearance, odor and flavor. In this study, yellow passion fruit (Passiflora edulis f. flavicarpa Deg.) seeds oil was extracted by mechanical pressing. Passion fruit seeds were dried in a convective dryer under temperatures of 50, 60 and 70°C in order to adjust different mathematical models to experimental data. Physico-chemical analyses were carried out of oil samples resulting from the refining process steps. Oil thermal performance was also evaluated during 90 days. Physico-chemical results varied in each refining stage: refractive index (1.4763 to 1.4666), water activity (0.9567 to 0.5140) and density (1.02 to 0.8914). Thermogravimetric (TGA), derivate thermogravimetric (DTGA) and differential scanning calorimetry (DSC) curves showed that refined oils presented a better thermal stability compared to the standard oil, without the clarification step.
Keywords clarifiers agents, oil extraction, oil refinery.

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