超临界流体中的Frenkel线与溶解度极值
Frenkel Line and Solubility Maximum in Supercritical Fluids
摘要：
最近提出了一种新的动力学线--弗伦克尔线，它能将超临界流体分离成刚性液体和非刚性气体状流体。对于实流体，Frenkel线在相图上的位置是未知的。在这里，我们绘制了三个重要系统的Frenkel线：CO2，H2O和CH 4。这为这些系统的相图提供了一个重要的分界线，该分界线将两种不同的物理状态与液体和气体性质分开。我们发现，在临界压力以上，Frenkel线可以具有与熔化线相似的趋势。此外，我们讨论了未解释的溶解度极大值与Frenkel线之间的关系，并提出Frenkel线对应于溶解度的最佳条件。
英文摘要：
A new dynamic line, the Frenkel line, has recently been proposed to separate the supercritical state into rigid-liquid and non-rigid gas-like uid. The location of Frenkel line on the phase diagram is unknown for real uids. Here, we map the Frenkel line for three important systems: CO2, H2O and CH4. This provides an important demarcation on the phase diagram of these systems, the demarcation that separates two distinct physical states with liquid-like and gas-like properties. We find that the Frenkel line can have similar trend as the melting line above the critical pressure. Moreover, we discuss the relationship between unexplained solubility maxima and Frenkel line, and propose that the Frenkel line corresponds to the optimal conditions for solubility.
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