2888232 - 1080B exhaust emission control system

CATAYTLIC CONVERTER

The oxidizing catalyzer is a post-treatment device for oxidizing the CO, HC and particle matter, transforming them into carbon dioxide (CO2) and water vapour (H2O).The catalytic converter consists of a ceramic, honeycomb structure monolith (1) with cells impregnated with platinum (2), which acts as a catalyst for the oxidation process.The exhaust gases which pass through the cells heat the catalyzer, triggering the conversion of the pollutants into inert compounds.The chemical reaction which causes the oxidation of the CO, HC, and particle matter takes place at temperatures of between 200 and 350°C.In effect, at temperatures above 350°C the sulphur, contained in the diesel fuel, starts to oxidize, producing sulphur dioxide and sulphuric anhydride.