Abstract
The sections of the phase diagram of a ternary system ethane–methane–water at pressures up to 1000 MPa were studied by means of the differential thermal analysis. The investigation was carried out under the conditions of excessive amount of the gas. It was established that two continuous rows of solid solutions belonging to the II type according to Rosenbom’s classification (with a maximum) exist within the whole pressure range studied: one of them is based on the cubic structure I (CS-I) and another on the cubic structure II (CS-II). With an increase in pressure, the maxima at the decomposition curves of solutions based on CS-II shift towards the hydrates with higher ethane content. This was explained in terms of intrusion of ethane molecules into the small d-cavities of the CS-II which is caused by the pressure imposed.
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This work was supported by RFBR grant 00-03-32563a and by the grant of Presidium SD RAS No. 76 “Gas hydrates”.
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Larionov, E., Dyadin, Y., Zhurko, F. et al. Phase Diagrams of the Ternary Gas Hydrate Forming Systems at High Pressures. Part II. Ethane–Methane–Water System. J Incl Phenom Macrocycl Chem 56, 303–308 (2006). https://doi.org/10.1007/s10847-005-9039-0
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DOI: https://doi.org/10.1007/s10847-005-9039-0