Equilibrium, kinetics and enthalpy of hydrogen adsorption in MOF-177

Dipendu Saha, Zuojun Wei, Shuguang Deng

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

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 12.7Å , a higher specific surface area (Langmuir: 5994 m2/g; BET: 3275 m2/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.

Original languageEnglish (US)
Pages (from-to)7479-7488
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume33
Issue number24
DOIs
StatePublished - Dec 2008
Externally publishedYes

Keywords

  • Characterization
  • Equilibrium
  • Hydrogen adsorption
  • Isosteric heat of adsorption
  • Kinetics
  • Metal-organic framework (MOF-177)
  • Synthesis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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