High pressure solid-liquid equilibria of fatty acids

被引:35
作者
Costa, Mariana C.
Krahenbuhl, M. A.
Meirelles, Antonio J. A.
Daridon, J. L.
Pauly, J.
Coutinho, J. A. P. [1 ]
机构
[1] Univ Aveiro, Dept Quim, CICECO, P-3810193 Aveiro, Portugal
[2] Univ Estadual Campinas, LPT, Dept Chem Proc, Chem Engn Fac, BR-13083970 Campinas, SP, Brazil
[3] Univ Estadual Campinas, Food Engn Fac, EXTRAE, Dept Food Engn, BR-13083862 Campinas, SP, Brazil
[4] Univ Pau & Pays Adour, Grp Haute Press, Lab Fluides Complexes, Pau, France
基金
巴西圣保罗研究基金会;
关键词
solid-liquid equilibrium; high pressure; phase diagrams; caprylic acid; lauric acid; myristic acid; modeling;
D O I
10.1016/j.fluid.2007.02.007
中图分类号
O414.1 [热力学];
学科分类号
摘要
The solid-liquid phase diagrams of two binary mixtures of saturated fatty acids, formed by caprylic acid (C(8:0)) + myristic acid (C(14:0)) and lauric acid (C(12:0)) + myristic acid (C(14:0)), were measured using high pressure microscopy in the range of 0. 1-90 MPa. It is shown that unlike for other long chain alkyl compounds such as alkanes the phase diagrams are only slightly affected by the pressure, even in very large pressure ranges such as studied in this work. The modeling of the measured phase diagrams was attempted using an approach previously developed by the authors for n-alkane mixtures. It is here shown that this model can provide an accurate description of the high pressure solid-liquid equilibrium of fatty acid mixtures. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:118 / 123
页数:6
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