Hydrate Layers on Ice Particles and Superheated Ice:  a 1H NMR Microimaging Study

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DOIResolve DOI: http://doi.org/10.1021/jp9839854
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TypeArticle
Journal titleThe Journal of Physical Chemistry
ISSN0022-3654
Volume103
Issue26
Pages49694972; # of pages: 4
Subjectsuperheated ice; microimaging; hydrate layers
AbstractRecent observations on the interaction of methane gas with ice surfaces have led to the suggestion that the resulting hydrate layer prevents the encapsulated ice from melting at its usual temperature. This would require ice to exist in a “superheated” state.1 We have examined the product of the gas−solid reaction with 1H NMR imaging. The imaging experiments show that the hydrate-encapsulated ice is able to melt at its usual melting point. As a possible alternative model, we suggest that a considerable amount of ice inside the hydrate layer can be converted to hydrate and liquid water under isothermal and constant volume conditions, the hydrate layer acting as an insulating, semipermeable layer that insulates processes inside the hydrate layer from external bulk temperature and pressure measurements.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NRC number42178
NPARC number21275384
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Record identifier2b0c5c6d-e0e0-4e41-86f2-54a6c0aef81f
Record created2015-06-24
Record modified2017-03-23
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