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Gas hydrate growth and dissociation in narrow pore networks: capillary inhibition and hysteresis phenomena

Anderson, Ross A., Tohidi, Bahman, Webber, J. Beau W. (2009) Gas hydrate growth and dissociation in narrow pore networks: capillary inhibition and hysteresis phenomena. Sediment-Hosted Gas Hydrates: New Insights on Natural and Synthetic Systems., 319 . pp. 145-159. (doi:10.1144/SP319.12) (KAR id:23118)

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Abstract

Marine sediments hosting gas hydrates are commonly fine-grained (silts, muds, clays)

phenomena could play an important role in controlling hydrate distribution in the seafloor, and

equilibria) hydrate stability zone (HSZ) thicknesses. Numerous recent laboratory studies have confirmed

narrow pores; however, to date the focus has been hydrate dissociation conditions in porous

neglected. Here, we present experimental methane hydrate growth and dissociation conditions

293 K, to 20 MPa) and pore size distributions. Results demonstrate that hydrate formation and

occurs at significantly lower temperatures (or higher pressures) than dissociation. Hysteresis

within which various characteristic secondary ‘scanning’ curve pathways may be followed.

characteristic of liquid–vapour transitions in mesoporous materials. The causes of such hysteresis

primary cause.

Item Type: Article
DOI/Identification number: 10.1144/SP319.12
Projects: [124] Capillary controls on gas hydrate growth and dissociation in synthetic and natural porous media: PVT, NMR, Neutron Diffraction and SANS
Subjects: Q Science > QC Physics > QC807 Geophysics (for Applied Geophysics see TN269)
Q Science > QE Geology
Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: J.B.W. Webber
Date Deposited: 27 Oct 2009 15:22 UTC
Last Modified: 28 May 2019 15:05 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/23118 (The current URI for this page, for reference purposes)
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