In this study, the gas hydrate method is applied in the separation of expensive gas mixtures such as xenon and argon. An isochoric pressure-search method was used to measure hydrate dissociation conditions. The compositions of the gas phase in equilibrium with the hydrate and aqueous phases were measured using a gas chromatography technique. A model based on the material balance equations with Newton’s numerical method was used to determine the compositions in the adjacent phases. A thermodynamic model based on the solid solution theory of van der Waals and Platteeuw, together with the Valderrama–Patel–Teja (VPT) equation of state and the Non-Density-Dependent (NDD) mixing rules were used to predict the experimental hydrate dissociation conditions. Model predictions were found to be in satisfactory agreement with the experimental data. In a single gas hydrate formation stage experimental results showed the purification of xenon from 0.2 to 0.97 mole fraction in a mixture with argon.

中文翻译：

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气体水合物在氙气和氩气混合物中分离纯化氙气中的应用

在本研究中，气体水合物方法用于分离昂贵的气体混合物，例如氙气和氩气。等容压力搜索方法用于测量水合物的解离条件。使用气相色谱技术测量与水合物和水相平衡的气相的组成。使用基于牛顿数值方法的材料平衡方程的模型来确定相邻相中的成分。基于范德华和普拉特的固溶体理论的热力学模型，连同 Valderrama-Patel-Teja (VPT) 状态方程和非密度相关 (NDD) 混合规则被用于预测实验水合物离解状况。发现模型预测与实验数据令人满意地一致。