Inhibited phase behavior of gas hydrates in graphene oxide: influences of surface and geometric constraints

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Porous materials have provided us unprecedented opportunities to develop emerging technologies such as molecular storage systems and separation mechanisms. Pores have also been used as supports to contain gas hydrates for the application in gas treatments. Necessarily, an exact understanding of the properties of gas hydrates in confining pores is important. Here, we investigated the formation of CO2, CH4 and N-2 hydrates in non-interlamellar voids in graphene oxide (GO), and their thermodynamic behaviors. For that, low temperature XRD and P-T traces were conducted to analyze the water structure and confirm hydrate formation, respectively, in GO after its exposure to gaseous molecules. Confinement and strong interaction of water with the hydrophilic surface of graphene oxide reduce water activity, which leads to the inhibited phase behavior of gas hydrates.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2014-11
Language
English
Article Type
Article
Keywords

CARBON-DIOXIDE; GRAPHITE OXIDE; SILICA-GEL; WATER-MOLECULES; CO2 SEPARATION; POROUS-MEDIA; FLUE-GAS; MIXTURES; RECOVERY; CRYSTALLIZATION

Citation

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.16, no.41, pp.22717 - 22722

ISSN
1463-9076
DOI
10.1039/c4cp03263b
URI
http://hdl.handle.net/10203/194489
Appears in Collection
EEW-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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