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Diesel Oxidation Catalytic Convertors (DOCs)

The diesel oxidation catalyst (DOC) owes its name to its ability to promote oxidation of several exhaust gas components by oxygen, which is present in ample quantities in diesel exhaust.  When passed over an oxidation catalyst, the main diesel pollutants can be oxidized to harmless products and thus can be controlled using the DOC:


  • carbon monoxide (CO),

  • gas phase hydrocarbons (HC),

  • organic fraction of diesel particulates (SOF)


Additional benefits of the DOC include oxidation of several non-regulated, HC-derived emissions, such as aldehydes or PAHs, as well as reduction or elimination of the odor of diesel exhaust.  We offer 3 types of catalyst, each of which can be supplied in basic form or integrated with special housings.


Diesel Oxidation Catalysts (DOC), used on petrol and diesel engines to reduce hydrocarbons and carbon monoxide.


Biogas Oxidation Catalysts (BOC), typically used on engines powered by reclaimed sewage or landfill gas


Three-Way Catalysts (TWC), are used in gasoline engines (petrol or gas) with lambda control and a stoichiometric air-fuel ratio (lambda λ = 1) with virtually no residual oxygen (O2) used in the exhaust gas.





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