Thermal and Catalytic Oxidizers destroy Hazardous Air pollutants (HAPs), Volatile Organic
Compounds (VOCs) and odorous emission that are often discharged from industrial and organic
processes. Through the process of catalytic oxidation, it converts the pollutants to much safer
carbon dioxide and water vapor. A catalytic oxidizer, also known as a Catox Incinerator, is a type
of oxidation system that is similar in function to a thermal oxidizer but uses a catalyst to promote
oxidation at lower temperatures.
A catalyst is a substance that is used to accelerate the rate of a chemical reaction, and by using
an industrial-grade catalyst bed in the air treatment equipment, oxidation is accomplished at a
much lower temperature compared to thermal oxidation.
When a catalytic oxidizer is used, an air pollutant is mixed with oxygen, which is then
heated to an elevated temperature and passed through a catalyst. This method destroys
the pollutant in the air stream by converting it to CO2 , H2O and heat. The rate of reaction
is controlled by the temperature of the catalyst chamber and the length of time the
pollutant spends within the catalyst itself.
Catalytic oxidation typically happens through a chemical reaction between the VOC
molecules and a metal or ceramic catalyst bed in the oxidizer system. This system can
operate effectively and efficiently from 370 to 480 degrees Celsius (oC), whereas a
thermal oxidizer requires temperatures nearly double that between 700oC to 820oC. This
can result in a major fuel from 40% to 60%, further reducing both the carbon emissions
and operating costs when compared to a thermal oxidizer.