Technologies -> 3-way (NSCR) Catalysts

3-way Catalysts – non selective catalytic reduction

Three-way catalysts (sometimes known as non-selective catalytic reduction, or NSCR, catalysts) are designed to simultaneously convert three pollutants to harmless emissions:

Carbon Monoxide (CO) -> Carbon Dioxide (CO₂)
Hydrocarbons (HC) -> Water (H₂0)
Oxides of Nitrogen (NOx) -> Nitrogen (N₂)

3-way catalysts will only give full conversion of each of these three pollutants in a gas stream containing a stoichiometric ratio of CO and NOx, as shown in the figure below.

There are many reaction pathways in a 3-way catalyst system, including those shown for the oxidation catalyst. The most important reactions for removing NOx can be summarised as:

2CO + 2NO -> 2CO₂ + N₂
[HC] + NO -> N₂ + CO₂ + H₂O

Typical applications:

• Stationary Source
• Cars, Vans and Light Trucks

Related products:
Stationary source NSCR