Thermoacoustic-catalytic system for cooling and transforming cryogenic hydrogen

Unmet Need: Efficient hydrogen cooling and spin conversion

Hydrogen is one of the most promising fuels for the future clean economy, as it does not produce harmful emissions and as a liquid, hydrogen is one of the most energy-dense carriers. However, conventional liquefaction and cooling systems for cryogenic hydrogen involve a number of moving parts and require passing through a catalytic bed to ensure spin conversion of hydrogen to bring it to the lowest energy state.

The Technology: Thermoacoustic hydrogen cooling over spin conversion catalyst bed for maximum efficiency

The inventors have developed an efficient hydrogen cooling system that combines the cooling and spin-conversion processes. This is done by employing thermoacoustic heat pumping in a porous matrix which serves as a catalytic bed to transform hydrogen from the ortho- to para- state. This technology improves the efficiency of hydrogen cooling, and reduces boil off significantly.


  • Hydrogen fuel
  • Gas liquefaction
  • Refrigeration


  • Efficient cooling
  • No chemical refrigerants
  • Low energy input

Patent Information:

Provisional patent filed

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Scott Steiger
Associate Director
Washington State University
(509) 335-7065
Reference No: TECH-22/3468


Konstantin Matveev
Jacob Leachman

Key Words