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Catalytic oxidation:
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The Application
Catalytic oxidation is a proven technology that has been used in various off-gas treatment systems for many years. The first mobile catalytic oxidation units from Villiger were introduced as early as 1989.
In order to save primary energy during the incineration of organic pollutants, the oxidation temperature is reduced to approx. 280°C - 650°C.
 The mixed-oxide and noble metal catalysts used in Villiger equipment are not sensitive to temperature variations and possess a remarkably low deactivation rate, guaranteeing a long catalyst life for our clients.
 Catalytic oxidation is used in, for example, treatment of off-gas from drying process, painting/spraying systems, chemical production processes, areas of pharmaceutical production, metal-working industries, coating units, and the food industry as well as in ground remediation.
The main advantages of catalytic oxidation are:
- Safe compliance with regulatory requirements
- Low investment costs
- Low operational costs
- Robust construction
- Long life-times
- Proven technology
- Universally applicable
Process principle  Flow sheet
The air to be treated is sucked into the unit using a blower and guided over a heat-exchanger which is warmed by treated gas leaving the unit. After this the untreated-air is brought to reaction temperature by either an electrical or gas heater and fed into the catalytic reactor. In the reactor the pollutants in the gas are oxidised to carbon dioxide and water.
The oxidation happens in a specially designed reactor.
At higher concentrations (from approx. 3g Ctotal / Nm³) autothermic operation is possible. This means that no further external energy is required to drive the oxidation reaction. The control and monitoring of the system is run by a MI&C system with a PLC, with optional messaging or dial-in systems or integration into an overall process control system.
The units can be equipped with explosion protection equipment such as concentration monitoring sensors (e.g. FID, FTA, IR etc.), detonation safeties and pressure relief equipment.
The units are designed taking the newest ATEX regulations into account. |
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