Catalytic Converter: Description and Operation
CATALYTIC CONVERTERThe catalytic converter is an emission control device added to the engine exhaust system in order to reduce hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) pollutants from the exhaust gas.
The catalytic converter is comprised of a ceramic monolith substrate, supported in insulation and housed within a sheet metal shell. The substrate may be waistcoated with 3 noble metals:
- Platinum (Pt)
- Palladium (Pd)
- Rhodium (Rh)
The catalyst in the converter is not serviceable.