Definitions and symbols
Total oxidation processes -Automotive depollution and air and water treatments

Three-way" catalyst: catalyst operating at stoichiometry and simultaneously oxidizing CO and HC and reducing NO_x . It is fitted to gasoline-powered vehicles.

Cerine: cerium oxide CeO₂ widely used in automotive catalysts to store oxygen thanks to the redox properties of the Ce⁴⁺/Ce³⁺ couple. This property enables the catalyst to continue working during rich phases (deficient in O₂).

TOC (total organic carbon): measures the quantity of carbon included in all organic pollutants in water.

VOC (volatile organic compound): in French law, the term COV applies to any organic compound with a vapour pressure greater than 10 Pa at 20°C and atmospheric pressure. The notion of toxicity is not included in the definition of VOCs.

NM-VOCs (non-methane VOCs):...