CATALYTIC CONVERTER SYSTEM OPERATION [L8, LF]

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• Contaminants in the exhaust gas (HC, CO, NOX) 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 NOX (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.
    NOX→ N2+ O2