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Hydrogen physisorption involves hydrogen physically adsorbing to either the surface of a molecule or within pores.


Technology

What is it?

Hydrogen physisorption involves hydrogen physically adsorbing to either the surface of a molecule or within pores. Metal organic frameworks are composed of inorganic metal clusters and organic linkers that act as highly selective networks of pores and channels providing a high surface area. Physisorption is driven by forces acting between the hydrogen molecules and the surface of the adsorbent material.

Why is it important?

Physisorption presents a lightweight, safe and fully reversible route for storage and transport of hydrogen.

Characteristics

  • Volumetric hydrogen density: ~40-50kg m3 demonstrated
  • Gravimetric hydrogen density: varies widely, ~2-20% by weight demonstrated
  • Storage conditions: Low temperatures (~-196°C)

Benefits

  • Lightweight materials
  • Release of hydrogen is endothermic, negating risk of ignition
  • Hydrogen can be adsorbed and released quickly
  • Fully reversible process

Limitations

  • Requires low temperature or high pressure
  • Weak interaction with H2 limits applicability

RD&D priorities

  • Demonstrate tank prototypes that can operate at reduced by not cryogenic conditions
  • Enhance the binding energy between the H2 molecules and adsorbents to increase hydrogen uptake
  • Investigate the effects of dopants, catalysts, and substitution to improve hydrogen uptake

Known active organisations

  • The Australian National University
  • CSIRO
  • Curtin University
  • Griffith University
  • Queensland University of Technology
  • The University of Adelaide
  • The University of Queensland
  • The University of Technology Sydney
  • The University of Western Australia

Other opportunities like this

Process group

Readiness Level

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