Deep-Sea Field Test of the CH4 Hydrate to CO2 Hydrate Spontaneous Conversion Hypothesis
Deep-Sea Field Test of the CH4 Hydrate to CO2 Hydrate Spontaneous Conversion Hypothesis
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DOI：
10.1021/ef501430h
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发表时间：
2014-10
期刊：
影响因子：
5.3
通讯作者：
P. Brewer;E. Peltzer;P. Walz;E. Coward;L. Stern;S. Kirby;John C. Pinkston
中科院分区：
文献类型：
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作者：
P. Brewer;E. Peltzer;P. Walz;E. Coward;L. Stern;S. Kirby;John C. Pinkston
我们已经进行了一个小规模的深海现场测试的假设，甲烷气体可以自发产生的甲烷水合物注入的CO2/N2气体混合物，从而诱导释放的囚禁分子与封存的注入气体。压力电池研究表明，在某些压力和温度条件下，这种气体混合物可以诱导形成固体N2/CO2水合物，而不产生相关的液态水。我们使用遥控潜水器（VENTANA）将压力容器中的纯CH 4水合物圆柱体运送到加利福尼亚州蒙特雷市海岸外690 m深的海底。在用车辆机械臂打开压力容器后，我们将水合物样品放置在金属支架上，并用充满25%CO2/75%N2气体混合物的玻璃圆筒覆盖，从而完全取代周围的海水（T = 4.92 °C）。我们观察到甲烷水合物的完全和快速分解，释放出液态水并产生混合气体。
We have carried out a small-scale deep-sea field test of the hypothesis that CH4 gas can be spontaneously produced from CH4 hydrate by injection of a CO2/N2 gas mixture, thereby inducing release of the encaged molecules with sequestration of the injected gas. Pressure cell studies have shown that, under some pressure and temperature conditions, this gas mixture can induce formation of a solid N2/CO2 hydrate with no associated liquid water production. We transported a cylinder of pure CH4 hydrate, contained within a pressure vessel, to the sea floor at 690 m depth off shore Monterey, CA, using the remotely operated vehicle (ROV) Ventana. Upon opening the pressure vessel with the vehicle robotic arm, we emplaced the hydrate specimen on a metal stand and covered this with a glass cylinder full of a 25% CO2/75% N2 gas mixture, thereby fully displacing the surrounding seawater (T = 4.92 °C). We observed complete and rapid dissociation of the CH4 hydrate with release of liquid water and creation of a mixed gas ...