期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 33, 期 24, 页码 7479-7488出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.09.053
关键词
Metal-organic framework (MOF-177); Synthesis; Characterization; Hydrogen adsorption; Equilibrium; Kinetics; Isosteric heat of adsorption
资金
- US Army Research Office [W911NF-06-1-0200]
Metal-organic framework (MOF-177) was synthesized, characterized and evaluated for hydrogen adsorption as a potential adsorbent for hydrogen storage. The hydrogen adsorption equilibrium and kinetic data were measured in a volumetric unit at low pressure and in a magnetic suspension balance at hydrogen pressure up to 100 bar. The MOF-177 adsorbent was characterized with nitrogen adsorption for pore textural properties, scanning electron microscopy for morphology and particle size, and X-ray powder diffraction for phase structure. The MOF-177 synthesized in this work was found to have a uniform pore size distribution with median pore size of 12.7 angstrom, a higher specific surface area (Langmuir: 5994 m(2)/g; BET: 3275 m(2)/g), and a higher hydrogen adsorption capacity (11.0 wt.% excess adsorption, 19.67 wt.% absolute adsorption) than previously reported values on MOF-177. Freundlich equation fits well the hydrogen adsorption isotherms at low and high pressures. Diffusivity and isosteric heat of hydrogen adsorption were estimated from the hydrogen adsorption kinetics and equilibrium data measured in this work. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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