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Regenerative Catalytic Oxidiser

A Regenerative Catalytic Oxidiser combines RTO technology with catalyst technology. During operation, the VOC-laden process air enters the oxidiser via flow control valves that direct the stream into energy recovery chambers. A layer of catalyst near the combustion chamber facilitates oxidation at temperatures up to 400°C lower than a standard RTO, further reducing the carbon emissions and operating costs of this already efficient thermal oxidiser.

As it passes through the media bed in the outlet flow direction, the hot, purified air then releases thermal energy, heating the outlet bed and cooling the air so that the outlet temperature is only slightly higher than the process inlet temperature. Poppet or butterfly valves alternate the airflow direction into the media beds to maximize energy recovery within the oxidiser – achieving high destruction efficiency and self-sustaining operation with no auxiliary fuel usage at low concentrations.


  • Two, three or multi-bed configurations
  • Supplemental Fuel Injection (SFI) for increased fuel efficiency, flameless thermal oxidation and ultra low NOx emissions.
  • Electrically heated units when fuel is not available on site
  • Acid gas scrubber module with completely integrated control system
  • Forced or induced draft fan configurations
  • Skid or remote mounted panels available for system controls

Features & Benefits

  • Multiple catalyst and ceramic media options are available for various process streams including halogenated applications
  • Customised ceramic media with thermal energy recovery up to 97%
  • Self-sustaining at low VOC concentrations
  • Low NOX burner design
  • PLC based control system with remote access
  • Variable Frequency Drive (VFD) allows for high volumetric turn-down during idle or low process conditions
  • Low system pressure drop reduces electrical consumption