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临界性质是物质的基本物理性质,也是关联各种物性数据的基本数据。不但常用于化工相变计算,而且广泛用于对应状态法中。取得物质临界性质的方法一般有两种:实测方法和预测方法。然而直接测定难度较大,特别是对于不稳定物质。后来便着重研究临界性质预测的方法,预测方法包括:与其它物性相关联的预测法、基团贡献法、结构描述子预测法等。本文在对比分析各种临界性质预测法的基础上,探讨各种方法的应用前景。
The critical nature of the material is the basic physical properties, but also the basic data associated with various physical data. Not only used in chemical phase transition calculation, but also widely used in the corresponding state method. There are two general methods for obtaining the criticality of matter: the method of actual measurement and the method of prediction. However, direct determination is more difficult, especially for unstable substances. Later, it will focus on the study of the critical nature of the forecasting methods, prediction methods include: predictions associated with other properties, the group contribution method, the structure descriptor prediction method. Based on the comparative analysis of various criticality prediction methods, this paper discusses the application prospects of various methods.