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首页> 外文期刊>Review of Scientific Instruments >Development of a high pressure electrical conductivity probe for experimental studies of gas hydrates in electrolytes
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Development of a high pressure electrical conductivity probe for experimental studies of gas hydrates in electrolytes

机译：研发用于实验研究电解液中气体水合物的高压电导率探针

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We previously reported the development of a high pressure automated lag time apparatus and a high pressure video cell for experimental study of nucleation and growth of gas hydrates. Here we report the development of a high pressure electrical conductivity probe that monitors the electrical conductivity of an electrolyte that is subjected to a linear cooling ramp at elevated hydrate-forming-gas pressures. The electrical conductivity steadily decreases as the linear cooling progresses because of the increasing viscosity of the electrolyte and the consequently decreasing mobility of the ions. The onset of the formation of methane-propane mixed gas hydrate films at the gas-electrolyte interface is marked by an upward spike in the electrical conductivity. The physical mechanisms behind this phenomenon remain to be elucidated. Continued cooling of the electrolyte to, and subsequent holding of, the temperature at 273 K eventually results in decreased electrical conductivity. This conductivity signal can be used for the detection of the onset of the formation of gas hydrates in optically opaque samples that contain electrolytes.
机译：我们之前曾报道过用于气体水合物成核和生长的实验研究的高压自动滞后时间设备和高压视频盒的开发。在这里，我们报告了高压电导率探头的开发情况，该探头可监视电解质的电导率，该电解质在升高的水合物形成气体压力下会经历线性冷却。随着线性冷却的进行，电导率稳步下降，这是因为电解质的粘度增加，因此离子的迁移率降低。在气体-电解质界面处开始形成甲烷-丙烷混合气体水合物膜的开始是电导率的上升。这种现象背后的物理机制仍有待阐明。继续将电解质冷却至273 K并随后保持该温度最终导致电导率降低。该电导率信号可用于检测包含电解质的光学不透明样品中气体水合物形成的开始。

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