Catalytic Converter: Description and Operation

The three way catalytic converter (TWC) plays a major role in the emission control system. The TWC operates as a gas reactor. Its catalytic function is to speed the heat-producing chemical reaction of components in the exhaust gases in order to reduce air pollutants.

The catalyst material inside the TWC consists of a ceramic substrate. The substrate is coated with a high surface area alumina and contains chemically active palladium.