Catalytic Converter: Description and Operation

Catalytic Converter:

OXIDATION CATALYST

The catalytic converter serves two purposes: it permits a faster chemical reaction to take place and although it enters into the chemical reaction, it remains the same, ready to repeat the process. It contains a platinum coated, ceramic, honeycombed structure. Through a chemical reaction, the platinum oxidizes HC and CO and converts them to carbon dioxide and water vapor. Effective operation of this type of catalyst requires temperatures of 600°F or higher as well as an adequate supply of oxygen in the exhaust system. Oxidation catalysts will normally "light off" (start oxidation) within two minutes after the first start of a cold engine.