Инд. авторы:	Manakov A.Yu., Dyadin Y.A., Ogienko A.G., Kurnosov A.V., Aladko E.Ya., Larionov E.G., Zhurko F.V., Voronin V.I., Berger I.F., Goryainov S.V., Lihacheva A.Yu., Ancharov A.I.
Заглавие:	Phase diagram and high-pressure boundary of hydrate formation in the carbon dioxide - water system
Библ. ссылка:	Manakov A.Yu., Dyadin Y.A., Ogienko A.G., Kurnosov A.V., Aladko E.Ya., Larionov E.G., Zhurko F.V., Voronin V.I., Berger I.F., Goryainov S.V., Lihacheva A.Yu., Ancharov A.I. Phase diagram and high-pressure boundary of hydrate formation in the carbon dioxide - water system // Journal of Physical Chemistry B: Biophysical Chemistry, Biomaterials, Liquids, and Soft Matter. - 2009. - Vol.113. - Iss. 20. - P.7257-7262. - ISSN 1520-6106.
Внешние системы:	DOI: 10.1021/jp9008493; SCOPUS: 2-s2.0-67650082840;
Реферат:	eng: Experimental investigation of the phase diagram of the system carbon dioxide-water at pressures up to 2.7 GPa has been carried out in order to explain earlier controversial results on the decomposition curves of the hydrates formed in this system. According to X-ray diffraction data, solid and/or liquid phases of water and CO2 coexist in the system at room temperature within the pressure range from 0.8 to 2.6 GPa; no clathrate hydrates are observed. The results of neutron diffraction experiments involving the samples with different CO2/H2O molar ratios, and the data on the phase diagram of the system carbon dioxide-water show that CO2 hydrate of cubic structure I is the only clathrate phase present in this system under studied P-T conditions. We suppose that in the cubic structure I hydrate of CO2 multiple occupation of the large hydrate cavities with CO2 molecules takes place. At pressure of about 0.8 GPa this hydrate decomposes into components indicating the presence of the upper pressure boundary of the existence of clathrate hydrates in the system. © 2009 American Chemical Society.
Ключевые слова:	Diffraction; Hydration; Phase diagrams; X ray diffraction; Clathrate hydrate; Clathrate phase; Cubic structure; Hydrates; X-ray diffraction data; Carbon dioxide; Room temperature; Pressure ranges; Pressure boundary; Molar ratio; Liquid phasis; Hydrate formation; Experimental investigations; Decomposition curves; Water system;
Издано:	2009
Физ. характеристика:	с.7257-7262