A fundamental understanding of the interfacial properties at elevated pressure is essential for processes in the context of the energy transition, such as the storage of CO2, H2 or CH4. Systems in such processes have traces of impurities. This work aims to systematically investigate these multi-component systems through simplified vapor-liquid-liquid systems comprising H2O, (n-butanol or n-dodecane), and (CO2 or CH4). The model systems are theoretically investigated using the density gradient theory and the PCP-SAFT. The interfacial tension and saturated phase density of the model systems are experimentally measured by the pendant drop and the oscillating tube method, respectively. Good agreement between the theoretical and experimental results is found. It was found that the pure and binary systems of these mixtures can be described well by the introduced model, delivering high quality predictions.

中文翻译：

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饱和条件下含 CO2、CH4、正丁醇、正十二烷和 H2O 的三相体系的有机水溶液和蒸汽水溶液界面现象


对于能源转型背景下的过程（例如 CO2、H2 或 CH4 的储存），对高压下的界面特性的基本理解至关重要。此类工艺中的系统有微量杂质。这项工作旨在通过简化的气-液-液系统系统地研究这些多组分系统，包括 H 2 O ，（正丁醇或正十二烷）和（CO2 或 CH4）。使用密度梯度理论和 PCP-SAFT 对模型系统进行了理论研究。模型系统的界面张力和饱和相密度分别通过悬滴法和振荡管法进行实验测量。理论结果与实验结果吻合较好。结果发现，这些混合物的纯系统和二进制系统可以通过引入的模型很好地描述，从而提供高质量的预测。