New High-Performance Gas Flow Equalizing Metal Supports for Automotive Exhaust Gas Catalysts

Format:

Conference/Event

Author/Creator:

Nonnenmann, Manfred, author.

Conference Name:

International Congress & Exposition (1990-02-26 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1990

Summary:

Under any driving conditions, the gas flow in present-day monoliths for automotive exhaust catalysts shows laminar characteristics resulting in thick boundary layers. These tend to restrict mass transfer, a highly desirable prerequisite to good catalytic activity.Based on the theory of catalysis and in the light of such all-important mass transfer, the design of the existing type of catalyst metal supports has been revised.The new metal supports vary from their predecessors by largely split and slotted honeycomb passages. In this way, gas flow is split and divided over and over again. This results in thin boundary layers and turbulence on the catalytically active support surfaces, with intense mass transfer between the core stream and the surface-contacting zone.The resultant improvements are discussed in terms of catalytic effect, size, weight, cost, internal flow, temperature equalization and component strength

Notes:

Vendor supplied data

Publisher Number:

900270

Access Restriction:

Restricted for use by site license