Cart
Article
Methane Hydrate Behavior under High Pressure
Full Text HTML
Hi-Res PDFPurchase the full-text
- PDF/HTML,
figures/images,
references and tables,
(where available)
Section:Abstract
Phases changes in a water−methane system were investigated in a pressure range from 0.2 to 5.5 GPa using a diamond anvil cell. In-situ X-ray diffractometry and optical microscopy revealed methane hydrate behavior from growth to decomposition into high-pressure ice and solid methane at room temperature. Methane hydrate crystallized at 0.2−0.3 GPa from liquid, and it was compressed continuously until 2.3 GPa, maintaining structure I. Below 0.7 GPa the cage occupancy was unchanged. At 1.5 GPa methane hydrate partly decomposed to ice IV and fluid methane. The remaining methane hydrate kept structure I, but the cage occupancy was changed; i.e., small cages became vacant. At 2.1 GPa, coexisting ice VI transformed to ice VII and fluid methane solidified to phase I, while methane hydrate remained. At this pressure, structure I of methane hydrate was still maintained, and an additional change of cage occupancy occurred. The change in the cage occupancy is consistent with the change in compressibility observed on the compression curve. At 2.3 GPa, all of the methane hydrate decomposed into ice VII and phase I of solid methane.
Citing Articles
Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.
This article has been cited by 11 ACS Journal articles (5 most recent appear below).
Structures of the I-, II- and H-Methane Clathrates and the Ice−Methane Clathrate Phase Transition from Quantum-Chemical Modeling with Force-Field Thermal Corrections
Annika Lenz and Lars OjamäeThe Journal of Physical Chemistry A2011 115 (23), 6169-6176Structures of the I-, II- and H-Methane Clathrates and the Ice−Methane Clathrate Phase Transition from Quantum-Chemical Modeling with Force-Field Thermal Corrections
Annika Lenz and Lars OjamäeThe Journal of Physical Chemistry A2011 115 (23), 6169-6176Methane hydrates with the three clathrate structures I, II, and H are studied by quantum-chemical methods. Hybrid density-functional theory B3LYP computations using periodic boundary conditions are combined with force-field methods for the thermal energy ...
Phase Transitions in Mixed Gas Hydrates: Experimental Observations versus Calculated Data
Judith M. Schicks, Rudolf Naumann, and Jörg Erzinger, Keith C. Hester, Carolyn A. Koh, and E. Dendy Sloan, Jr.The Journal of Physical Chemistry B2006 110 (23), 11468-11474Phase Transitions in Mixed Gas Hydrates: Experimental Observations versus Calculated Data
Judith M. Schicks, Rudolf Naumann, and Jörg Erzinger, Keith C. Hester, Carolyn A. Koh, and E. Dendy Sloan, Jr.The Journal of Physical Chemistry B2006 110 (23), 11468-11474This paper presents the phase behavior of multicomponent gas hydrate systems formed from primarily methane with small amounts of ethane and propane. Experimental conditions were typically in a pressure range between 1 and 6 MPa, and the temperature range ...
Calculating the Phase Behavior of Gas-Hydrate-Forming Systems from Molecular Models
S. J. Wierzchowski and P. A. MonsonIndustrial & Engineering Chemistry Research2006 45 (1), 424-431Calculating the Phase Behavior of Gas-Hydrate-Forming Systems from Molecular Models
S. J. Wierzchowski and P. A. MonsonIndustrial & Engineering Chemistry Research2006 45 (1), 424-431We describe a calculation of the phase behavior of the methane−water system, including the structure-I hydrate phase, starting from a model of the intermolecular forces in the system and using Monte Carlo simulations and theory. The approach we use ...
Dissociation Behavior of Pellet-Shaped Methane Hydrate in Ethylene Glycol and Silicone Oil. Part 1: Dissociation above Ice Point
Taro Kawamura, Yasuhide Sakamoto, Michika Ohtake, Yoshitaka Yamamoto, Takeshi Komai, and Hironori Haneda, Ji-Ho YoonIndustrial & Engineering Chemistry Research2006 45 (1), 360-364Dissociation Behavior of Pellet-Shaped Methane Hydrate in Ethylene Glycol and Silicone Oil. Part 1: Dissociation above Ice Point
Taro Kawamura, Yasuhide Sakamoto, Michika Ohtake, Yoshitaka Yamamoto, Takeshi Komai, and Hironori Haneda, Ji-Ho YoonIndustrial & Engineering Chemistry Research2006 45 (1), 360-364The dissociation behavior of a pellet-shaped methane gas hydrate in ethylene glycol and silicone oil above the ice point (273.15 K) has been investigated experimentally, assuming the transportation or storage systems of natural gas using gas hydrates. ...
Molecular Models for the Intercalation of Methane Hydrate Complexes in Montmorillonite Clay
Randall T. Cygan, Stephen Guggenheim, and August F. Koster van GroosThe Journal of Physical Chemistry B2004 108 (39), 15141-15149Molecular Models for the Intercalation of Methane Hydrate Complexes in Montmorillonite Clay
Randall T. Cygan, Stephen Guggenheim, and August F. Koster van GroosThe Journal of Physical Chemistry B2004 108 (39), 15141-15149Molecular simulations were performed to determine the structure and behavior of methane and H2O in the interlayer of various montmorillonite clays. Molecular dynamics using NPT ensembles and large simulation supercellscomprised of Na-, K-, Ca-, and Mg-...
Tools
-
Add to Favorites
-
Download Citation
-
Email a Colleague -
Permalink
Order Reprints
Rights & Permissions
Citation Alerts
History
- Published In Issue February 24, 2000
- Received July 28, 1999
Revised November 10, 1999
ACS
Network
Facebook
Tweet This
CiteULike
Newsvine
Digg This
Delicious
