Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 288, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2019.109561
Keywords
Solubility; Adsorption; Solid/liquid interface; Gas/liquid/solid system; Adsorbent; Zeolite; MOF; Silica
Categories
Funding
- Project OCTAPPOM within the research program NEEDS (Nucleaire, Energie, Environnement, Dechets et Societe)
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Oversolubility effects refer to a large increase of the solubility of gases in liquids confined in nanoporous solids with respect to the value predicted by Henry's law. This review presents the state of the art of oversolubility by discussing the molecular mechanisms responsible for such effects and the conditions for their observation. Both experimental and theoretical approaches are reviewed, in a non-exhaustive fashion, with special emphasis on results that have helped to unravel the oversolubility phenomenon. Different porous materials including metal organic frameworks (MOF), ordered porous silicas, and zeolites are considered in combination with various nanoconfined liquids and gases relevant to practical applications in energy and environmental science. Depending on the gas/liquid/solid system considered, oversolubility is shown to pertain either to adsorption (increased concentration at solid/gas and liquid/gas interfaces) or to confinement-induced solubility increase. We also critically discuss when oversolubility effects are expected to lead to improved performance in catalysis or environmental applications such as for air purification.
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