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Mixed oxides for automotive TWC applications

The field of Autocatalysis is very much legislation driven and this varies significantly dependent upon geographical location. This results in the need for advanced materials to meet the performance requirements, particularly after accelerated aging cycles.

Catalytic converters for gasoline vehicles simultaneously convert NOx, CO and Hydrocarbons in the exhaust (hence Three Way Catalysis, TWC). Luxfer MEL Technologies’ Ceria Zirconia Mixed Oxides are a key component in this process as they act as an oxygen buffer to ensure optimal conditions for pollutant control.

We have developed customized formulations for gasoline TWC, Gasoline Particulate Filters (GPF), Diesel Oxidation Catalysts (DOC), Diesel Particulate Filters (DPF), passive NOx Absorbers (PNA), and selective catalytic reduction (SCR).

  • OSC testing by O2 pulse
  • Broadly follows Ce-level

Luxfer MEL Technologies’ advantages

  • Global supply is done from our manufacturing plants in Flemington, NJ, USA and Manchester, UK.
  • In addition to a wide range of hydroxides and oxides, LMT also produces many zirconium based solutions often used as binders, adhesion promoters and sources of zirconium for catalysis.
  • LMT is backward integrated by starting with zircon sand as the basic raw material.
  • Luxfer MEL Technologies is committed to developing materials that offer a specific benefit in these individual applications, but with sufficient robustness that we can tailor them to suit the end user.

0.1% Rh loaded CZ (hydrothermally aged 1,100 ˚C/12 hr)

  • OSC testing by H2 pulse (i.e. lean-to-rich)
  • More differentiation between samples

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