Catalytic Converter: Description and Operation

OXIDATION CATALYTIC CONVERTERS
The oxidation catalytic converter is used in conjunction with the air injection system to reduce HC and CO in the exhaust system. Two basic materials are incorporated in the oxidation catalytic converter, Palladium (Pd) and Rhodium (Rh).

THREE-WAY CATALYTIC CONVERTERS
The purpose of the three-way catalytic converter is to simultaneously reduce ``HC'' (Hydrocarbon), ``CO'' (Carbon Monoxide) and ``NOx'' (Oxides of Nitrogen) emission in the exhaust manifold.
Two basic materials are incorporated in the three-way catalytic converter, platinum (Pt) and Rhodium (Rh). A thin film of their mixture is applied onto the honeycomb or porous ceramic of an oval shaped carrier.