The role of oxidation catalysts for diesel vehicles

‌The main role of diesel vehicle oxidation catalyst (DOC) is to reduce the emission of harmful substances in diesel vehicle exhaust, including carbon monoxide (CO), hydrocarbons (HC) and certain nitrogen oxides (NOx), thereby improving the emission performance of vehicles and making them more environmentally friendly ‌‌.

Specific action mechanism

The oxidation catalyst for diesel vehicles converts harmful substances into harmless substances through the catalytic conversion process. In diesel exhaust pipes, oxidation catalysts use REDOX reactions to convert nitrogen oxides (NOx), hydrocarbons (HC) and carbon monoxide (CO) into oxygen, water and carbon dioxide ‌. This conversion process not only reduces the emission of harmful substances, but also improves the quality of exhaust gas.

Composition and material

Diesel vehicle oxidation catalysts are usually composed of one or more precious metals, such as palladium, rhodium, silver, etc. These metals, as the active components of catalysts, can effectively promote the REDOX reaction ‌. In addition, some catalysts also contain an appropriate amount of rare earth elements to promote the secondary oxidation of particulate matter in the tail gas, and further reduce the emission of particulate matter ‌.