Johnson Matthey
Johnson Matthey - Model TWC -Three-Way Catalysts
FromJohnson Matthey
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% – if the air-to-fuel ratio (AFR) is accurately controlled. Optimised conversion is achieved with an AFR of 14.7:1.
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monolith catalyst
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.