Thermodynamic properties of hydrate phases immersed in ice phase
Thermodynamic properties of hydrate phases immersed in ice phase
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DOI：
10.1088/1742-6596/29/1/039
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
V. Belosludov;O. Subbotin;Dmitrii S. Krupskii;T. Ikeshoji;R. Belosludov;Y. Kawazoe;J. Kudoh
中科院分区：
文献类型：
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作者：
V. Belosludov;O. Subbotin;Dmitrii S. Krupskii;T. Ikeshoji;R. Belosludov;Y. Kawazoe;J. Kudoh
在宏观和微观分子模型的框架下，研究了甲烷水合物在冰相中的热力学性质和水合物相压力，以了解甲烷水合物自保效应的本质。结果表明，随着温度的升高，甲烷水合物浸泡在冰相中时，甲烷水合物内部压力增加，如果冰层结构不被破坏，甲烷水合物的压力将大于冰相。这是因为甲烷水合物的热膨胀比冰大几倍。水合物的热膨胀受到冰的热膨胀的限制，因为它可以保持在甲烷水合物相图中的稳定区域。CS-II甲烷-乙烷水合物完全缺乏保存行为可以解释乙烷-甲烷水合物的热膨胀与冰的热膨胀一致，而不是冰的热膨胀所抑制的。根据冰相和水合物相之间的关系，求出了冰与水合物界面相交时的压力和密度，并研究了该体系的动力学稳定性和热力学稳定性。
Thermodynamic properties and the pressure of hydrate phases immersed in the ice phase with the aim to understand the nature of self-preservation effect of methane hydrate in the framework of macroscopic and microscopic molecular models was studied. It was show that increasing of pressure is happen inside methane hydrate phases immersed in the ice phase under increasing temperature and if the ice structure does not destroy, the methane hydrate will have larger pressure than ice phase. This is because of the thermal expansion of methane hydrate in a few times larger than ice one. The thermal expansion of the hydrate is constrained by the thermal expansion of ice because it can remain in a region of stability within the methane hydrate phase diagram. The utter lack of preservation behavior in CS-II methane- ethane hydrate can be explain that the thermal expansion of ethane-methane hydrate coincide with than ice one it do not pent up by thermal expansion of ice. The pressure and density during the crossing of interface between ice and hydrate was found and dynamical and thermodynamic stability of this system are studied in accordance with relation between ice phase and hydrate phase.