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CATALYTIC CONVERTER SYSTEM OPERATION

BHE011620500T03

• Toxic substances (HC, CO, NOX) in exhaust gas are purified by oxidization and reduction while passing through the catalytic converter.

  – Oxidation

  • Combines toxic HC and CO with oxygen to produce non-toxic carbon dioxide and water.
  O2 + HC + CO → CO2 + H2O

  – Reduction

  • Converts toxic NOX (nitrogen oxides) into non-toxic nitrogen and oxygen. Part of the oxygen produced in this process is used for oxidation.
  NOX → N2 + O2