Artículos de revistas
The Binary (solid + Liquid) Phase Diagrams Of (caprylic Or Capric Acid) + (1-octanol Or 1-decanol)
Registro en:
Journal Of Chemical Thermodynamics. Academic Press, v. 78, n. , p. 99 - 108, 2014.
219614
10.1016/j.jct.2014.06.011
2-s2.0-84902183068
Autor
Carareto N.D.D.
Castagnaro T.
Costa M.C.
Meirelles A.J.A.
Institución
Resumen
In the present study the phase diagrams of four (fatty acid + fatty alcohol) binary mixtures composed of caprylic (C8O2) or capric acid (C10O2) + 1-octanol (C8OH) or 1-decanol (C10OH) were obtained by differential scanning calorimetry (DSC). Eutectic and peritectic reactions occurred in the systems. In standard DSC analyses of the (C8O2 + C10OH) and (C10O2 + C8OH) systems, an exothermic transition occurs in association with the melting of a metastable phase. A Stepscan DSC method was used in order to avoid the formation of this metastable phase during the heating of the mixtures. The approach suggested by Slaughter and Doherty (1995) [24] was used for modeling the solid phase, and the Margules 2-suffix, Margules 3-suffix and NRTL models were applied for calculating the activity coefficients of the liquid phase. The best modeling results were obtained using the Margules-3-suffix with an average deviation between experimental and calculated values ranging from T = (0.3 to 0.9) K. © 2014 Elsevier Ltd. All rights reserved. 78
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