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.
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― Oxidization process
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• 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
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― Deoxidization process
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• 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.
NOX→ N2+ O2