The thermodynamic consistency test of solubility P–T–x data for binary mixtures including carbon dioxide (CO2) + a room temperature ionic liquid has been investigated. Experimental solubility data taken from the open literature for 32 binary mixtures of CO2/RTILs contains 80 isotherms. The applied consistency test is based on the fundamental Gibbs–Duhem equation with use of the generic Redlich–Kwong (GRK) equation of state (EoS) coupled with the van der Waals–Berthelot (GRK/vdWB) mixing rule. The optimum parameters were obtained by minimizing the summation of per cent relative deviations between modeled and experimental data, based on the bubble pressure algorithm. Modeling was found acceptable for all isotherms, which demonstrated the usability of the GRK equation of state. Results of the thermodynamic consistency test showed that 36 of the isothermal data sets were thermodynamically consistent, 37 were not fully consistent, 6 were thermodynamically inconsistent and only one data set was found to need another model.

中文翻译：

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使用通用 Redlich-Kwong 状态方程对包括二氧化碳 (CO2) 和离子液体在内的二元系统的汽液平衡数据进行热力学一致性测试

已经研究了包括二氧化碳 (CO2) + 室温离子液体的二元混合物的溶解度 P-T-x 数据的热力学一致性测试。来自公开文献的 32 种 CO2/RTIL 的二元混合物的实验溶解度数据包含 80 条等温线。应用一致性测试基于基本的 Gibbs-Duhem 方程，使用通用 Redlich-Kwong (GRK) 状态方程 (EoS) 和 van der Waals-Berthelot (GRK/vdWB) 混合规则。基于气泡压力算法，通过最小化建模数据和实验数据之间的百分比相对偏差的总和来获得最佳参数。发现建模对于所有等温线都是可接受的，这证明了 GRK 状态方程的可用性。