The behaviour of aged three-way catalytic converters in the different modes of legislated cycles
✍ Scribed by Ioannis P. Kandylas; Anastassios M. Stamatelos
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 273 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0363-907X
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✦ Synopsis
Automotive three-way catalytic converters are routinely applied today in the elimination of carbon monoxide, urburned or partially burned hydrocarbons and nitrogen oxides from gasoline engine exhaust gas. Catalyst activity in this case is only indirectly assessed by means of the measurement of overall emissions during a legislated driving cycle. The speci"c structure of the driving cycles embodied in a legislated emissions test procedure, signi"cantly a!ects catalyst performance. In addition, catalyst behaviour is a!ected by the levels of raw engine emissions and catalyst inlet temperatures. The latter are strongly in#uenced by exhaust system design. The above explain easily the di$culties arising when one wants to discriminate between the behaviour of di!erent catalysts in a speci"c test procedure. The advent of reliable mathematical models of three-way catalytic converter operation allows for a detailed analysis of catalyst performance over the full legislated cycle, which gives more insight into the catalytic activity itself. In this paper, a speci"c experimental and computational case study is employed to demonstrate the role of mathematical modelling in the detailed analysis of aged catalyst performance during the US and EU legislated test procedures.