Three-way catalytic converters (TWC)

Applications: 

• Three-way catalytic converters are used in spark-ignition engines (petrol or gas) with lambda control and a stoichiometric fuel-air ratio (lambda λ=1) and virtually no residual oxygen (O₂) in the exhaust gas.

Oxidation: 

• Over 90% of the carbon monoxide (CO) is converted into carbon dioxide (CO₂).
• Up to 90% of hydrocarbons (HC) are converted into carbon dioxide (CO₂) and water (H₂O).

Reduction: 

• Up to more than 90% of nitrogen oxides are reduced.

Coating: 

• The coating of our catalyst support is usually made of platinum and rhodium. Palladium and barium are used less frequently.