Axial Characterization of Lightoff and Underfloor Catalytic Converters Vehicle-Aged on a 5.7 L Corvette General Motors NAO Research and Development Center

Format:

Book

Conference/Event

Author/Creator:

Beck, Donald D., author.

Conference Name:

1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition (1995-10-16 : Toronto, Canada)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

Catalysts taken from the lightoff and underfloor converters of two 1986 Corvette exhaust systems which had been vehicle-aged for 100,000+ miles were cut into 1 thick sections along their axis and characterized for lean lightoff and warmed-up performance using a laboratory reactor. Sections were then treated to remove the poisons, and the characterization was repeated. An axial gradient in both lightoff and warmed-up conversion efficiency for HC and CO was detected within the first 2 of both lightoff converters for both vehicles. This activity gradient is in agreement with the gradient in the phosphorus and zinc concentrations found in the front 2-3 sections of the lightoff converters. Comparison of these data sets with those obtained after removal of the P and Zn poisons led us to conclude that a significant part of the total deterioration of activity can be attributed to phosphorus and zinc poisoning for the front 1 (and to a lesser extent for the second 1 section) of the lightoff converters

Notes:

Vendor supplied data

Publisher Number:

952416

Access Restriction:

Restricted for use by site license