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Dispersion Forces Stabilize Ice Coatings at Certain Gas Hydrate Interfaces That Prevent Water Wetting
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi, Ytbehandlingsteknik.
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2019 (engelsk)Inngår i: ACS Earth and Space Chemistry, ISSN 2472-3452, Vol. 3, nr 6, s. 1014-1022Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Gas hydrates formed in oceans and permafrost occur in vast quantities on Earth representing both a massive potential fuel source and a large threat in climate forecasts. They have been predicted to be important on other bodies in our solar systems such as Enceladus, a moon of Saturn. CO 2 -hydrates likely drive the massive gas-rich water plumes seen and sampled by the spacecraft Cassini, and the source of these hydrates is thought to be due to buoyant gas hydrate particles. Dispersion forces can in some cases cause gas hydrates at thermal equilibrium to be coated in a 3-4 nm thick film of ice, or to contact water directly, depending on which gas they contain. As an example, the results are valid at a quadruple point of the water-CO 2 gas hydrate system, where a film is formed not only for the model with pure ice but also in the presence of impurities in water or in the ice layer. These films are shown to significantly alter the properties of the gas hydrate clusters, for example, whether they float or sink. It is also expected to influence gas hydrate growth and gas leakage.

sted, utgiver, år, opplag, sider
American Chemical Society , 2019. Vol. 3, nr 6, s. 1014-1022
Emneord [en]
Buoyancy, Dispersion forces, Gas hydrates, Interfacial ice formation, Lifshitz interactions
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Identifikatorer
URN: urn:nbn:se:kth:diva-252231DOI: 10.1021/acsearthspacechem.9b00019ISI: 000472799900013Scopus ID: 2-s2.0-85065146430OAI: oai:DiVA.org:kth-252231DiVA, id: diva2:1323397
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QC 20190612

Tilgjengelig fra: 2019-06-12 Laget: 2019-06-12 Sist oppdatert: 2019-07-31bibliografisk kontrollert

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