Phase Diagram of the Xe–H2O System up to 15 kbar |
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Authors: | Yu A Dyadin EG Larionov DS Mirinskij TV Mikina E Ya Aladko LI Starostina |
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Institution: | (1) Institute of Inorganic Chemistry, Russian Academy of Sciences, 630090 Novosibirsk, Russia |
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Abstract: | The phase equilibria in the Xe–H2O system have been studied by the DTA technique under hydrostatic pressures up to 15 000 bar in a temperature range from -25 °C to 100 °C. We have shown that the cubic structure I xenon hydrate forming at ambient pressure does not undergo any phase transitions under the conditions studied. The temperature of its decomposition into water solution and gas (fluid) increases from 27 °C at 25 bar to 78.2 °C at 6150 bar. At higher pressures the hydrate decomposes into water solution and solid xenon. In the temperature range from 6800 to 9500 bar the decomposition temperature (79.0–79.5 °C) is practically independent of pressure, while further pressure increase results in a slow decrease to 67 °C at 15 000 bar. |
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Keywords: | Xenon hydrate high pressure phase diagram clathrate hydrate gas hydrate |
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