Johnson Matthey - 2-way (Oxidation) Catalysts

In most gas streams, carbon monoxide (CO) and hydrocarbons (HC) can be removed by combination with oxygen (O2) using an oxidation catalyst (also known as a 2-way catalyst): CO + ½ O2 → CO2, [HC] + O2 → CO2 + H2O. This reaction is suitable for oxygen-rich (“lean”) gas streams, typical of diesel exhaust and many industrial process emissions. Many diesel particulate filter systems incorporate an oxidation catalyst, either as a coating on the filter or as a separate element. In diesel exhaust applications, oxidation catalysts may also achieve up to 30% reduction of PM emissions.