近临界区流体相态和热力学性质研究现状及发展趋势

Status and development tendency of fluid phase behavior and thermodynamic property research in the near-critical regions

近临界区流体相态和热力学性质的研究是当前化学工程领域受到重视的前沿研究课题。本文扼要介绍了临界现象与临界指数，描述了近临界区流体相态和热力学性质的实验测定与估算方法，并对该领域的研究动态作了讨论。

The study on the fluid phase behavior and thermodynamic properties in the near-critical regions is a current frontier topic in the fields of chemical engineering. In this paper, the critical phenomena and the critical exponents are described briefly.The experimental techniques for determining the phase behavior and thermodynamic properties of fluid mixtures in the near-critical regions are discussed. The research progress on the topic is also discussed.