In this communication, the promoting effects of two additive mixtures (cyclopentane + TBANO₃) on CH₄ hydrate phase equilibrium were experimentally investigated using the isochoric method. The mass fractions of TBANO₃ employed in this paper were 5, 10, 15, and 20. The results showed that cyclopentane is a good promoter in comparison with pure water + CH₄ systems, and TBANO₃ has a promoting effect but not like cyclopentane in compassion with pure water + CH₄ systems. Additionally, the mixture of cyclopentane + TBANO₃ has an important promoting effect in comparison with pure water and TBANO₃ + water + CH₄ systems, but it has a less promoting effect in comparison with cyclopentane + water + CH₄ systems. Furthermore, a new thermodynamic model was investigated to predict the equilibrium conditions of hydrate dissociation (pressure and temperature). The hydrate phase was described by the van der Waals–Platteeuw model, and the aqueous phase was predicted with the E-NRTL model. In addition, the NRTL model was used to predict the organic phase, and the gas phase was described with SRK EOS. The results revealed that the experimental hydrate dissociation data’s agreement with the proposed model is acceptable and possesses an average of 2.43%. Finally, an analogy was generated with the literature data. This study gives a better comparison of hydrate phase equilibrium combined with CH₄ capture.

中文翻译：

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在TBANO ₃和环戊烷促进剂混合物存在下CH _4的水合物解离条件：热力学建模和实验测量

在此交流中，使用等渗法实验研究了两种添加剂混合物（环戊烷+ TBANO ₃）对CH ₄水合物相平衡的促进作用。本文使用的TBANO ₃的质量分数为5、10、15和20。结果表明，与纯水+ CH ₄体系相比，环戊烷是一种良好的促进剂，TBANO ₃具有促进作用，但不像环戊烷同情于纯净水+ CH ₄系统。此外，与纯水和TBANO ₃ +水+ CH ₄相比，环戊烷+ TBANO ₃的混合物具有重要的促进作用。系统，但与环戊烷+水+ CH ₄系统相比，其促进作用较小。此外，研究了一种新的热力学模型来预测水合物离解的平衡条件（压力和温度）。水合物相由van der Waals-Platteeuw模型描述，水相由E-NRTL模型预测。另外，使用NRTL模型预测有机相，并使用SRK EOS描述气相。结果表明，实验水合物解离数据与所提出模型的一致性是可以接受的，平均为2.43％。最后，利用文献数据得出了一个类比。这项研究更好地比较了水合物相平衡与CH ₄捕集相结合。