Different Adsorption Behaviors of Methane and Carbon Dioxide in the Isotypic Nanoporous Metal Terephthalates MIL-53 and MIL-47
Sandrine Bourrelly(Centre National de la Recherche Scientifique), Philip L. Llewellyn(Université de Versailles Saint-Quentin-en-Yvelines), Christian Serre(Institut Universitaire de France), Franck Millange(Université de Versailles Saint-Quentin-en-Yvelines), Thierry Loiseau(Institut Universitaire de France), Gérard Férey(Institut Lavoisier de Versailles)
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Abstract
A distinct step in the isotherm occurs during the adsorption of CO2 on MIL-53 at 304 K. Such behavior is neither observed during the adsorption of CH4 on MIL-53 nor during the adsorption on the isostructural MIL-47. This phenomenon seems to be due to a different mechanism than that of previous adsorption steps on MOF samples. It is suggested that a breathing behavior is induced in MIL-53 during CO2 adsorption.
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