Catalytic post-combustion system

Catalytic post-combustion system

Due to the use of catalysts, the oxidation of pollutants can take place at lower temperatures and is therefore particularly energy-saving. The presence of so-called catalyst poisons such as sulphur, heavy metals or halogens can be a problem for this plant technology. These would severely limit the service lifetime of a catalytic converter. Contact us whether your exhaust air is suitable for the use of a catalytic converter.

Operating principle

The pollutant exhaust air is extracted by a fan and fed into the cleaning system. To reduce fuel consumption, the exhaust gas is heated considerably by the upstream heat exchanger before it is brought to the required reaction temperature with an electric heater or burner. The catalytically active substance lowers the required temperature level compared to thermal combustion, so that the oxidation of the pollutants takes place at a temperature of approximately 350°C - 450°C. The purified exhaust gas then flows through the heat exchanger and transfers a large part of its energy to the pollutant-laden raw gas.

The purified exhaust gas essentially contains O2, N2, CO2 and H2O and can easily be released into the atmosphere.

Due to the preheating via the heat exchanger and the lowered reaction temperature, this process is a very cost-effective method for exhaust air purification.

Industry solutions

Catalytic exhaust air purification is used in applications where defined process conditions exist and possible catalyst poisons can be excluded.

The catalysts and operating conditions are adapted to the respective area of application.

This is taken into account in the following industrial sectors, among others:

  • Chemical/pharmaceutical industry
  • Petrochemical industry

Technical data

Exhaust air volume
500 bis 100.000 Nm³/h
Heat exchanger efficiency
bis zu 70 %

Typical contaminants

Pollutant concentrations   low to medium loading
Temperature range  300 – 450°C


  • Suitable for applications without possible catalyst poisons
  • Optimized/lower energy requirement compared to other cleaning processes
  • Can be integrated into the production plant
  • Low maintenance effort
  • Easy accessibility and therefore good options for cleaning and catalyst replacement
  • Potential for heat recovery with water, thermal oil or air
  • Electric heating as an alternative to gas is possible
  • Low space requirement due to the compact design and comparatively low weight
  • The system can be installed indoors/outdoors, horizontally/vertically, on a foundation/steel structure or on a roof

Further products

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