Abstract In this work, the equilibrium conditions of xenon hydrates have been measured within wide pressure and temperature ranges. Various experimental equipment have been used for this purpose, namely the tensimeter, the Cailletet apparatus, and the high-pressure autoclave. A number of three-phase equilibrium data points were measured for liquid water-hydrate-vapor (Lw-H-V) and the ice-hydrate-vapor (I-H-V). It was concluded that there is a good consistency between the experimental data points measured in this work and those obtained by the other groups in the literature. A modified van der Waals-Platteeuw (vdW-P) model was used to predict the xenon hydrate stability conditions. The Kihara spherical-core potential function was used to represent the intermolecular forces between the water molecules and the xenon molecules in the cavities. The fugacity of xenon in the vapor/gas phase was computed using the Peng-Robinson (PR) EoS. The solubility of xenon in the liquid phase was calculated through the Krichevsky-Kasarnovsky equation. The investigated model had the ability to predict the xenon hydrate stability conditions with good accuracy within wide ranges of pressures and temperatures, resulting in an average absolute deviation (AAD) of about 0.61 K for (Lw-H-V) and 0.42 K for (I-H-V) equilibrium temperatures.

中文翻译：

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氙包合物水合物稳定性条件的实验研究和热力学模拟

摘要 在这项工作中，氙水合物的平衡条件已经在很宽的压力和温度范围内进行了测量。为此目的使用了各种实验设备，即张力计、Cailletet 装置和高压釜。测量了液态水水合物蒸汽 (Lw-HV) 和冰水合物蒸汽 (IHV) 的许多三相平衡数据点。得出的结论是，在这项工作中测量的实验数据点与文献中其他组获得的数据点之间存在良好的一致性。使用改进的范德华-普拉特 (vdW-P) 模型来预测氙水合物的稳定性条件。Kihara 球核势函数用于表示空腔中水分子和氙分子之间的分子间作用力。使用 Peng-Robinson (PR) EoS 计算气相/气相中氙的逸度。氙在液相中的溶解度通过 Krichevsky-Kasarnovsky 方程计算。研究的模型能够在很宽的压力和温度范围内以良好的精度预测氙水合物的稳定性条件，导致（Lw-HV）的平均绝对偏差（AAD）约为 0.61 K，（IHV）为 0.42 K平衡温度。