Different Adsorption Behaviors of Methane and Carbon Dioxide in the Isotypic Nanoporous Metal Terephthalates MIL-53 and MIL-47

• Published in: Journal of the American Chemical Society Vol. 127; no. 39; pp. 13519 - 13521
• Main Authors: Bourrelly, Sandrine, Llewellyn, Philip L, Serre, Christian, Millange, Franck, Loiseau, Thierry, Férey, Gérard
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 05.10.2005
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Solid-gas interface; Surface physical chemistry; Inorganic adsorbate; Methane; Carbon dioxide; Adsorption isotherm; Adsorption capacity; Microcalorimetry; Experimental study; Organic adsorbent; Molecular sieve; Gas solid adsorption; Gas solid interface; Organic salt; Heat of adsorption
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/ja054668v

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.