含极性抑制剂体系中水合物生成条件的研究

Study on the Hydrate Formation Conditions from System Containing Polar Inhibitor

应用两步水合物热力学模型，结合基于局部组成概念的混合规则，将水合物生成条件预测成功地扩展应用于含极性抑制剂体系，计算结果较理想。大量检验结果表明，单流体混合规则不能很好地描述极性体系。同时可以看出，极性体系相平衡计算的准确性对水合物生成条件预测有很大的影响。

This work is aimed at increasing the prediction accuracy of gas hydrate formation conditions from system containing polar inhibitor. Based on double-process hydrate initiation mechanism, a new thermodynamic hydrate model has been successfully extended to system containing polar inhibitor by incorporating with the mixing rule based on local composition concept. Extensive test results indicate that this model is superior to the traditional van der Waals-Platteeuw typed models and the single fluid mixing rule is not adequate for the polar system. At the same time, it can be seen that the accuracy of VLE calculation of the polar system has a great effect on the prediction of the hydrate formation conditions.