A pulse chromatographic study of the adsorption properties of the amino-MIL-53 (Al) metal-organic framework

被引：65

作者：

Couck, Sarah ^{[1
]}

Remy, Tom ^{[1
]}

Baron, Gino V. ^{[1
]}

Gascon, Jorge ^{[2
]}

Kapteijn, Freek ^{[2
]}

Denayer, Joeri F. M. ^{[1
]}

机构：

[1] Vrije Univ Brussel, Dept Chem Engn, Brussels, Belgium

[2] Delft Univ Technol, NL-2600 AA Delft, Netherlands

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2010年 / 12卷 / 32期

基金：

美国国家科学基金会;

关键词：

CARBON-DIOXIDE; MESOPOROUS SILICA; ISORETICULAR MOFS; SHAPE-SELECTIVITY; HYDROGEN STORAGE; XYLENE ISOMERS; PORE-SIZE; SEPARATION; MIL-53; DESIGN;

D O I：

10.1039/b927115e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-coverage adsorption properties of the metal-organic framework amino-MIL-53 (Al) were determined using the pulse chromatographic technique. By using n-alkanes, iso-alkanes, 1-alkenes, cyclohexane and benzene as probe molecules, the nature of the adsorptive interactions in amino-MIL-53 (Al) was studied. Henry adsorption constants and adsorption enthalpies of iso-alkanes are significantly lower than those of the linear alkanes, demonstrating the shape selective properties of amino-MIL-53. The presence of amino-groups in the pores of the material increases the electrostatic contributions with molecules containing double bonds. A simple model relates adsorption enthalpies to the number of hydrogen atoms and double bonds in the molecule. The effective pore size of the material was estimated based on the relationship between adsorption enthalpy and entropy.

引用

页码：9413 / 9418

页数：6

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