Solid–liquid equilibrium (SLE) results for binary mixtures of either tetradecanoic acid (C₁₄H₂₈O₂) or dodecanoic acid (C₁₂H₂₄O₂) with three heavy paraffins of octadecane (C₁₈H₃₈), eicosane (C₂₀H₄₂), and docosane (C₂₂H₄₆) are presented in this study. The experimental measurements were conducted using differential scanning calorimetry (DSC). The experimental SLE data for five binary systems are reported and all systems show simple eutectic behavior. The fractional transformation values were determined using the heat generated during various time intervals from DSC analyses. Eutectic compositions were evaluated by plotting the eutectic fraction against composition. These experimental SLE data were correlated using the Wilson activity coefficient model, and the best-fitted binary parameters for all systems are illustrated. These novel SLE data supply useful information for the separation process or the design of phase-change materials (PCMs).

中文翻译：

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使用 DSC 测量的十四酸或十二酸与三种重链烷烃的五种二元混合物的固液平衡

十四烷酸 (C ₁₄ H ₂₈ O ₂ ) 或十二烷酸 (C ₁₂ H ₂₄ O ₂ ) 与十八烷 (C ₁₈ H ₃₈ )、二十烷 (C ₂₀ H ₄₂ ) 和二十二烷 (C ₂₂ H ₄₆) 在本研究中介绍。实验测量是使用差示扫描量热法 (DSC) 进行的。报告了五个二元系统的实验 SLE 数据，所有系统都显示出简单的共晶行为。使用在不同时间间隔期间从 DSC 分析产生的热量来确定分数转化值。通过将共晶分数与成分作图来评估共晶成分。这些实验性 SLE 数据使用威尔逊活动系数模型相关联，并说明了所有系统的最佳拟合二元参数。这些新颖的 SLE 数据为分离过程或相变材料 (PCM) 的设计提供了有用的信息。