The Effect of High Temperature Ageing on Platinum-Rhodium and Palladium-Rhodium Three Way Catalysts 910175
The durability of platinum-rhodium and palladium-rhodium three way catalysts has been investigated after ageing at elevated temperatures. Catalysts were subjected to inlet temperatures of between 780 and 960 °C for periods up to 100 hours on an engine bench. It may be concluded that platinum-rhodium catalysts have a better resistance to ageing at catalyst inlet temperatures above 840 °C than palladium-rhodium catalysts at the same loading. A new formulation palladium-rhodium catalyst loaded at 60 g/ft3 and a ratio of 9:1 showed substantially improved high temperature durability.
Citation: Brisley, R., O'Sullivan, R., and Wilkins, A., "The Effect of High Temperature Ageing on Platinum-Rhodium and Palladium-Rhodium Three Way Catalysts," SAE Technical Paper 910175, 1991, https://doi.org/10.4271/910175. Download Citation