1977-02-01

Metal Supported Catalysts for Automotive Applications 770299

THE DEVELOPMENT of a novel precious metal catalyst system supported on a metal substrate is outlined. The key nature of the metallic species is demonstrated. A high performance alloy, FECRALLOY STEEL®, is identified as a suitable material.
Conversion of this alloy into a durable catalyst using a proprietary pre-treatment to render it compatible with existing catalysts and production procedures is discussed. The flexibility in processing with respect to key design features e.g. cell density, is emphasised.
The influence of support variables such as volume, cell density etc., on the performance of an oxidation catalyst is reported together with comparable data for ceramic supported catalyst.
It is shown that at zero hours, equivalent performance, at no power loss penalty relative to ceramics, can be secured by judicious choice of cell density/volume combinations. Such equivalence can be achieved with significantly lower volumes and significant scope exists for further optimisation. The key role of cell density in this respect is identified and an optimum value in the region of 500 cells per square inch is indicated.
Durability data is reported for various concepts and it is demonstrated that equivalence to ceramics can be achieved at extended operating periods over small volumes of metal substrates. The equivalence of two support types is established, one of which offers a significant reduction in the weight of Fecralloy®Steel used per unit volume and, therefore, in the material cost.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Advanced Metallic Three-Way Catalysts with Optimized Washcoat Performance

960560

View Details

TECHNICAL PAPER

Natural Gas Engines for Cogeneration: Highest Efficiency and Near-Zero-Emissions through Turbocharging, EGR and 3-Way Catalytic Converter

2000-01-2825

View Details

TECHNICAL PAPER

STAINLESS STEELS - Hot and Otherwise

440151

View Details

X