EXPERIMENTAL STUDY ON ISOTOPIC FRACTIONATION IN WATER DURING GAS HYDRATE FORMATION
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
EXPERIMENTAL STUDY ON ISOTOPIC FRACTIONATION IN WATER DURING GAS HYDRATE FORMATION
Maekawa T.
xmlui.dri2xhtml.METS-1.0.item-citation:
Geochemical Journal, 2004, 38, 2, 129-138
Date:
2004
Abstract:
Isotopic fractionation of oxygen and hydrogen in water caused by gas hydrate formation was investigated experimen- tally. Two different gas hydrates in structures, Structure I hydrate and Structure II hydrate, were formed with methane and krypton gases in a NaCl solution. Isotopic fractionation during gas hydrate formation was observed by measuring oxygen and hydrogen isotopic compositions in the solutions sampled before and after gas hydrate formation. Heavy isotopes of oxygen and hydrogen in water were depleted in the solution resulting from that those isotopes were concentrated in the gas hydrate. The isotopic fractionation was larger as increasing amounts of gas hydrates that were calculated from both the decrease of gas pressure and increase of NaCl concentration in solution. The isotopic fractionation factors of oxygen and hydrogen in water between gas hydrate and liquid water were determined to be 1.0023-1.0032 and 1.014-1.022, respectively. The significant difference of the gas hydrate structures was not observed beyond the analytical errors. These factors are similar to those between ice and liquid water.
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru
Related items
Showing items related by title, author, creator and subject.
-
Buleyko V.M.; Makogon Yu.F. (1989)Interest in the thermodynamic properties of gas hydrates is on the rise. A thorough knowledge of these properties would provide a basis for the effective use of these hydrates in various technologies, for finding new methods ...
-
Verkhovsky A.B.; Ginsburg G.D.; Prasolov E.M. (1988)
-
Guggenheim S.; van Groos A.F.K. (2003)Intercalated Na-rich montmorillonite-methane hydrate was synthesized for the first time. The upper limit of stability for the intercalate in pressure and temperature is parallel to that of methane hydrate but at temperatures ...
Search DSpace
Browse
-
All of DSpace
-
This Collection