The Coexistence of Two Different Methane Hydrate Phases under Moderate Pressure and Temperature Conditions: Kinetic versus Thermodynamic Products

The Coexistence of Two Different Methane Hydrate Phases under Moderate Pressure and Temperature Conditions: Kinetic versus Thermodynamic Products

The unexpected coexistence of structure I (s I) and structure II (s II) methane hydrates under conditions where only s I hydrates should be stable (see picture) suggests that the initial product is determined by kinetics. The state of coexistence as well as the transformation of the kinetic product...

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Veröffentlicht in:Angewandte Chemie International Edition 2004-06, Vol.43 (25), p.3310-3313
Hauptverfasser: Schicks, Judith M., Ripmeester, John A.
Format: Artikel
Sprache:eng
Schlagworte:
gas hydrate
Kinetics
Methane - chemistry
Pressure
raman spectroscopy
Temperature
Thermodynamics
Water - chemistry
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Zusammenfassung:The unexpected coexistence of structure I (s I) and structure II (s II) methane hydrates under conditions where only s I hydrates should be stable (see picture) suggests that the initial product is determined by kinetics. The state of coexistence as well as the transformation of the kinetic product into the thermodynamically stable s I hydrate was documented by microscopic visual observation as well as Raman spectroscopy.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200453898