Pruteanu, CG;
Ackland, GJ;
Poon, WCK;
Loveday, JS;
(2017)
When immiscible becomes miscible-Methane in water at high pressures.
Science Advances
, 3
(8)
, Article e1700240. 10.1126/sciadv.1700240.
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Abstract
At low pressures, the solubility of gases in liquids is governed by Henry’s law, which states that the saturated solubility of a gas in a liquid is proportional to the partial pressure of the gas. As the pressure increases, most gases depart from this ideal behavior in a sublinear fashion, leveling off at pressures in the 1- to 5-kbar (0.1 to 0.5 GPa) range with solubilities of less than 1 mole percent (mol %). This contrasts strikingly with the well-known marked increase in solubility of simple gases in water at high temperature associated with the critical point (647 K and 212 bar). The solubility of the smallest hydrocarbon, the simple gas methane, in water under a range of pressure and temperature is of widespread importance, because it is a paradigmatic hydrophobe and occurs widely in terrestrial and extraterrestrial geology. We report measurements up to 3.5 GPa of the pressure dependence of the solubility of methane in water at 100°C—well below the latter’s critical temperature. Our results reveal a marked increase in solubility between 1 and 2 GPa, leading to a state above 2 GPa where the maximum solubility of methane in water exceeds 35 mol %.
| Type: | Article |
|---|---|
| Title: | When immiscible becomes miscible-Methane in water at high pressures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/sciadv.1700240 |
| Publisher version: | http://doi.org/10.1126/sciadv.1700240 |
| Language: | English |
| Additional information: | Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
| Keywords: | Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, ICE-VIII, DIFFRACTION, HYDRATE, PHASE, GPA, TEMPERATURE, HYDROGEN, EQUATION, STATE, CELL |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10025052 |
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