This paper presents a new experimental VLE (PTxy) property data of aniline in the near and supercritical CO₂ at four selected isotherms of (313.15, 333.15, 353.15, and 443.15) K over the pressure range from (0.8 to 32.4) MPa using a high-temperature and high-pressure (HTHP) optical cell. Samples were taken from both equilibrium phases and analyzed using gravimetric technique. The critical property data ($P_C-T_C$) have been estimated based on measured VLE data for SC CO₂ +aniline mixture. The PC-SAFT and PR equations of state (EoS) were successfully applied to model the phase equilibrium (PTxy) behavior of CO₂ +aniline mixture. The present experimental VLE data and the critical curves behavior predicted from both EoS indicates that the phase diagram of the CO₂ +aniline mixture belongs to Type III according to classification Konynenburg and Scott.

本文提出了苯胺在近临界和超临界 CO _{2中的新实验 VLE (} PTxy ) 性质数据，在 (313.15、333.15、353.15 和 443.15) K 的四个选定等温线、压力范围 (0.8 至 32.4) MPa 下，使用高温高压 (HTHP) 光学池。从两个平衡相中取样并使用重量分析技术进行分析。关键属性数据（${磷}_C-{\mathrm{时间}}_C$) 是根据 SC CO ₂ +苯胺混合物的测量 VLE 数据估算的。_{PC-SAFT 和 PR 状态方程 (EoS) 成功应用于模拟 CO 2} +苯胺混合物的相平衡 ( PTxy ) 行为。_{目前的实验VLE 数据和从EoS 预测的临界曲线行为表明，根据Konynenburg 和Scott 分类，CO 2 +苯胺混合物}的相图属于III 型。