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Gas uptake in solvents confined in mesopores: adsorption versus enhanced solubility

TitleGas uptake in solvents confined in mesopores: adsorption versus enhanced solubility
Publication TypeJournal Article
Year of Publication2013
AuthorsHo LNgoc, Clauzier S, Schuurman Y, Farrusseng D, Coasne BA
JournalThe Journal of Physical Chemistry Letters
Volume4
Issue14
Pagination2274–2278
Date PublishedJun-25-2013
Abstract
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Three molecular mechanisms for gas uptake in a solvent confined in mesopores are identified. On the one hand, CO2 uptake is an adsorption-driven phenomenon that arises from the strong interaction between the gas molecules and the pore surface. On the other hand, H2 uptake is a confinement-induced enhanced solubility in which solubility is favored in the regions of low solvent density formed by the layering of the solvent. In partially filled pores, adsorption at the gas/liquid solvent interface is a third mechanism that leads to large gas uptakes. This study, which sheds light on previously reported yet unclear oversolubility in pores, provides a guide to design hybrid porous catalysts consisting of a solvent confined in a porous solid.

DOI10.1021/jz401143x
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