Local Pressure of Supercritical Adsorbed Hydrogen in Nanopores

Jimmy Romanos, Sara Abou Dargham, Roy Roukos, Peter Pfeifer

Research output: Contribution to journalArticleAcademicpeer-review


An overview is given of the development of sorbent materials for hydrogen storage. Understanding the surface properties of the adsorbed film is crucial to optimize hydrogen storage capacities. In this work, the lattice gas model (Ono-Kondo) is used to determine the properties of the adsorbed hydrogen film from a single supercritical hydrogen isotherm at 77 K. In addition, this method does not require a conversion between gravimetric excess adsorption and absolute adsorption. The overall average binding energy of hydrogen is 4.4 kJ/mol and the binding energy at low coverage is 9.2 kJ/mol. The hydrogen film density at saturation is 0.10 g/mL corresponding to a local pressure of 1500 bar in the adsorbed phase.

Original languageEnglish
Issue number11
Publication statusPublished - 10 Nov 2018
Externally publishedYes


  • hydrogen storage
  • ono-kondo
  • activated carbon
  • adsorption
  • nanopores


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