CATALYTIC CONVERTER SYSTEM OPERATION [L8, LF]

• Contaminants in the exhaust gas (HC, CO, NO_X) are purified by oxidization and deoxidization while passing through the catalytic converter.

- Oxidization process

• Noxious HC (hydrocarbon) and CO (carbon monoxide) are bonded to oxygen which is converted to non-noxious carbon dioxide and water.

O₂ + HC + CO → CO₂ + H₂O

- Deoxidization process

• Noxious NO_X (nitrogen oxide) is converted to non-noxious nitrogen and oxygen. A part of the oxygen generated at this time is used in the oxidization process.

NO_X → N₂ + O₂