Solid-liquid equilibrium of binary fatty acid mixtures
Solid-liquid equilibrium of binary fatty acid mixtures
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DOI：
10.1021/je060146z
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发表时间：
2007-01-01
期刊：
影响因子：
--
通讯作者：
Meirelles, Antonio J. A.
中科院分区：
文献类型：
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作者：
Costa, Mariana C.;Rolemberg, Marlus P.;Meirelles, Antonio J. A.
在本工作中，通过差示扫描量热法（DSC）获得了七种脂肪酸二元混合物的相图。这些混合物由癸酸 (C-10:0) 与月桂酸 (C-12:0)、肉豆蔻酸 (C-14:0)、棕榈酸 (C-16:0) 或硬脂酸 (C-18:0) 以及月桂酸 (C-12:0) 与肉豆蔻酸 (C-14:0)、棕榈酸 (C-16:0) 或硬脂酸形成（C-18:0）。样条技术用于将这项工作的结果与文献中针对某些研究系统的先前结果进行比较。观察到在所有系统中出现共晶点以及在一些系统中出现包晶点。包晶点的出现可能与混合物中使用的脂肪酸链的碳原子数的差异有关。使用 Slaughter 和 Doherty (Chem. Eng. Sci. < BO> 1995, 50, 1679-1694) 提出的方法对固相进行建模，并使用 Margules-2-suffix、Margules-3-suffix、UNIFAC Dortmund 和 NRTL 模型对液相进行建模。使用 Margules-3 后缀获得了最佳建模结果，实验值与计算值之间的平均偏差为 0.14%。
In the present work the phase diagrams of seven fatty acid binary mixtures were obtained by differential scanning calorimetry (DSC). These mixtures were formed by capric acid (C-10:0) with lauric acid (C-12:0), myristic acid (C-14:0), palmitic acid (C-16:0), or stearic acid (C-18:0) and by lauric acid (C-12:0) with myristic acid (C-14:0), palmitic acid (C-16:0), or stearic acid (C-18:0). The spline technique was used to compare the results of this work with prior results available in the literature for some of the investigated systems. The occurrence of the eutectic point in all systems and of the peritectic point in some of the systems was observed. The occurrence of the peritectic point can be associated with the difference in the number of carbon atoms of the fatty acid chains used in the mixture. The approach suggested by Slaughter and Doherty (Chem. Eng. Sci. < BO > 1995 , 50, 1679-1694) was used to model the solid phase, and the liquid phase was modeled using the Margules-2-suffix, Margules-3-suffix, UNIFAC Dortmund, and NRTL models. The best modeling results were obtained using the Margules-3-suffix with an average deviation between experimental and calculated values of 0.14%.