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Diesel Oxidation Catalyst (DOC)

Diesel Oxidation Catalysts (DOCs) reduce the amount of carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas by oxidizing them to carbon dioxide and water.

2 CO + O2 → 2 CO2

CxHy + (x+y/4) O2 → x CO2 + (y/2) H2O

The oxidation of NO to NO2 is another important function of DOCs, enabling a faster reduction of NOx with NH3 on the downstream SCR technologies when NO2 is present.

2 NO + O2 → 2 NO2

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