Three-way catalysts (TWC)
Gasoline fuelled vehicles utilise a three-way catalyst that can reduce carbon monoxide (CO), hydrocarbon (HC) and oxides of nitrogen (NOx) emissions by over 99% &²Ô²ú²õ±è;â€�&²Ô²ú²õ±è; if the air-to-fuel ratio (AFR) is accurately controlled. Optimised conversion is achieved with an AFR of 14.7:1.
[CO] + O2 â†�&²Ô²ú²õ±è;°ä°¿2
[HC] + O2 â†�&²Ô²ú²õ±è;°ä°¿2 + H2O
[NOx] + H2 â†�&²Ô²ú²õ±è;±·2 + H2O
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Composition: Typically, precious metals (Pd, Pt or Rh) with alumina and rare earth oxide, coated on a flow-through monolith.
Our three-way catalysts�
- Are the product of our long-established expertise developing a portfolio of catalyst solutions for various engines and vehicle platforms
- Are tailored for a variety of needs in terms of back pressure, cost, oxygen storage levels and precious metal
- Are designed using materials to help our customers meet demanding global durability targets.