What are the Types of Catalysts Used in Emission Control?
There are several types of catalysts used in emission control, including:
1. Three-way Catalysts (TWCs): Used primarily in automobiles, these catalysts can simultaneously convert CO, NOx, and hydrocarbons (HC) into CO2, N2, and H2O. 2. Selective Catalytic Reduction (SCR) Catalysts: Utilized mainly in diesel engines and industrial settings, these catalysts reduce NOx emissions by converting them to N2 and H2O using a reductant like ammonia (NH3). 3. Oxidation Catalysts: These are used to oxidize CO and hydrocarbons into CO2 and H2O in both mobile and stationary sources.
