Browse Publications Technical Papers 810275
1981-02-01

Three-Way Catalyst Performance Characterization 810275

A simplified method was developed to obtain three-way catalyst performance data to be used for predicting vehicle CVS-H emissions. This method involves engine dynamometer aging of catalysts and characterization of their performance as a function of four variables, namely, redox potential, temperature, space velocity and a modulation parameter. In the process of reducing the number of variables, several simplifications were made. The simplifications, their limitations and the characteristic trends in the performance of a 11 Pt/Rh catalyst are discussed.

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