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Comparison of predicted and experimental DSC curves for vegetable oils

Teles dos Santos, Moises and Gerbaud, Vincent and Carrillo Le Roux, Galo Comparison of predicted and experimental DSC curves for vegetable oils. (2012) Thermochimica Acta, vol. 545 . pp. 96-102. ISSN 0040-6031

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Official URL: http://dx.doi.org/10.1016/j.tca.2012.07.007

Abstract

We compare experimental and predicted differential scanning calorimetry (DSC) curves for palm oil(PO), peanut oil (PeO) and grapeseed oil (GO). The predicted curves are computed from the solid–liquid equilibrium modelling and direct minimization of the Gibbs free energy. For PO, the lower the scan rate, the better the agreement. The temperature transitions of PeO and GO were predicted with an average deviation of −0.72°C and −1.29°C respectively, in relation to experimental data from literature. However, the predicted curves showed other peaks not reported experimentally, as computed DSC curves correspond to equilibrium hypothesis which is reached experimentally for an infinitely small scan rate. The results revealed that predicted transitions temperatures using equilibrium hypotheses can be useful in pre-experimental evaluation of vegetable oils formulations seeking for desired melting profiles.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/j.tca.2012.07.007
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Universidade de São Paulo - USP (BRAZIL)
Laboratory name:
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Deposited By:Vincent GERBAUD

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