Evaluation of Spatially Resolved Performance of NOx Adsorber Catalysts 2009-01-0275
A novel laboratory methodology has been developed and applied to evaluate performance of NOx Adsorber catalysts, based on the detailed analysis of micro-core samples obtained from various locations in a full-size catalyst. The technique includes a protocol for evaluating various aspects of NOx performance, as well as direct measurements of the amount of sulfur on the catalyst.
This method was used to determine the NOx performance and distribution of sulfur loading on several engine aged catalysts. It showed the ability to differentiate poor NOx performance due to insufficient desulfation from that due to thermal degradation. This method further quantifies different forms of sulfur that are present on the catalyst. These forms of sulfur are distinguished by the temperature at which they are removed. In addition, the aspects of sulfur behavior that are important to this technique are discussed.
Citation: Li, J., Currier, N., Yezerets, A., Chen, H. et al., "Evaluation of Spatially Resolved Performance of NOx Adsorber Catalysts," SAE Technical Paper 2009-01-0275, 2009, https://doi.org/10.4271/2009-01-0275. Download Citation
Author(s):
Junhui Li, Neal W. Currier, Aleksey Yezerets, Hai-Ying Chen, Howard S. Hess
Affiliated:
Cummins Inc, Johnson Matthey, Inc
Pages: 9
Event:
SAE World Congress & Exhibition
Also in:
Diesel Exhaust Emission Control, 2009-SP-2254