Regenerative thermal oxidation

Regenerative Thermal Oxidation


Regenerative thermal oxidation (RTO or Thermoreactor) is a VOC treatmenttechnology which allows the elimination of gaseous contaminants from the emissions of many industrial processes, heating them to a temperature of 800ºC for a given time of residence, ensuring the mixture turbulence, so that they are combined with Oxygen, thereby completely transforming them into CO2 and water through their oxidation reaction.

COVs + O2 à CO2 + H2O + Heat

This technology is the most suitable for treatment of emissions contaminated with volatile organic compounds in a wide range of flows and concentrations.


The RTO is made up of 3 or 5 vertical towers connected by a semi-cylindrical transversal chamber installed on the upper section. Each tower contains a heat recovery system, supported on a bed of high performance ceramic elements which serve as a heat accumulator which allows very high efficacy and operating performance of up to 95% to be achieved. In each one of the cycles, this ceramic bed is heated until reaching a temperature near to that of reaction (between 750 and 800ºC, depending on the contaminants) or cooled, depending on the direction of the gas passing through it.

In the oxidation chamber, located on the upper part of the RTO, the thermal oxidation reaction will be completed maintaining appropriate temperature, time of residence and mixture turbulence conditions.

The reaction temperature in the oxidation chamber is reached by the energy released by the VOCs present in the gas to be purified, and if this energy contribution is not sufficient, in the oxidation chamber there is a burner (usually natural gas, LPG, etc.) to maintain the oxidation temperature of the chamber.

Fields of application
  • Manufacture of paints and varnish
  • Automobile industry
  • Surface coverings and treatments
  • Graphic, flexographic and rotogravure industries
  • Manufacture of packaging
  • Food industry
  • Wood coverings
  • Chemical and pharmaceutical sector
  • Petrochemical, Oil and Gas industry


  • Fully autonomous system, incorporating the latest automation technology, with a system fully integrated in the device and remote access in case of urgent breakdown
  • Minimal operating and maintenance costs
  • High quality finishes with own manufacturing in our installations
  • Top quality commercial elements
  • Specific design for each installation
  • 95% efficacy in the heat exchanger
  • Reduced consumption of fuel and energy

This technique is suitable for eliminating volatile organic compounds in practically all cases where the flow of gas ranges from 3,000-250,000Nm3/h)