Trimetallic Three-Way Catalysts Engelhard Technologies

Format:

Book

Conference/Event

Author/Creator:

Punke, A., author.

Conference Name:

International Congress & Exposition (1995-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

European car manufacturers have traditionally used Pt/Rh or Pd/Rh TWCs with PM loadings of 40-60 g/ft3. New regulations, however have stimulated interest in high Pd loadings (100 g/ft3 or more) in order to drastically reduce HC emissions. Pd is known to have good HC oxidation activity, high thermal stability and is relatively inexpensive. However, it suffers from excessive sensitivity to poisons and is usually associated with poor NOx conversion.A research program was initiated with the goal of capturing the benefits of high Pd concentrations while minimizing its disadvantages. It was found that trimetal formulations (Pt/Pd/Rh) could achieve high NOx conversions provided the loadings of the PMs were optimized based on a Box-Behnken design.Data showing the high thermal stability and low H2S emissions of these new "TriMax" catalysts will be presented. Their high performance has led to commercial acceptance by several European car manufacturers

Notes:

Vendor supplied data

Publisher Number:

950255

Access Restriction:

Restricted for use by site license