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为了解自然赋存条件下天然气水合物的分解性质,本研究在20～40目石英砂中进行了甲烷水合物降压分解实验。实验表明,与温度及压力一样,电阻是甲烷水合物形成和分解良好的指示参数。当水合物形成,电阻快速增大;水合物分解时电阻快速减小。实验研究表明,与注热水分解相比,降压分解速率要小得多。同时当采取密闭的分解方式时,随着分解的进行分解速率逐渐变小。由形成/分解体系的物料衡算及反应速率方程可以得出分解速率常数值。
In order to understand the nature of natural gas hydrate decomposition under natural conditions, the study in 20 ~ 40 mesh quartz sand methane hydrate step-down decomposition experiments. Experiments have shown that resistance, like temperature and pressure, is a good indicator of the formation and decomposition of methane hydrates. When hydrates form, the electrical resistance increases rapidly; the electrical resistance decreases rapidly as the hydrates dissociate. Experimental studies have shown that the pressure-lowering decomposition rate is much smaller than that of water-in-hot water. At the same time, when adopting a closed decomposition method, the decomposition rate gradually decreases as the decomposition progresses. From the formation / decomposition system of material accounting and reaction rate equation can be obtained decomposition rate constant value.