The Effect of Palladium on the Performance of Three-Way Catalyst Toyota Central R. and D. Labs., Incorporated

Format:

Conference/Event

Author/Creator:

Muraki, Hideaki, 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:

There is a great interest in the use of palladium in automotive emission control catalysts because of cost and availability. On the above basis, we made a prompt effort to replace platinum by palladium in conventional platinum/rhodium systems. This paper reports the performance of aged palladium containing three-way catalysts in the laboratory.Increasing the palladium and rhodium loading from 0.5 g/1 and 0.1 g/1, respectively, to 1.0 g/1 and 0.2 g/1, respectively, resulted in improved catalyst light-off and conversion performances. The light-off performance under the dynamic conditions improved with the increasing A/F perturbation until the optimum value, and its behavior was different from platinum/rhodium catalyst. The effect of palladium on the durability performance of the palladium/rhodium catalyst was compared with that of the platinum/palladium/rhodium catalyst. Further studies were done in the characterization of catalysts and the surface enrichment of palladium-rhodium and platinum-rhodium alloy systems heated in air and hydrogen

Notes:

Vendor supplied data

Publisher Number:

900610

Access Restriction:

Restricted for use by site license