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Moos, Ralf ; Beulertz, Gregor ; Reiß, Sebastian ; Hagen, Gunter ; Fischerauer, Gerhard ; Votsmeier, Martin ; Gieshoff, Jürgen:
Overview: Status of the Microwave-Based Automotive Catalyst State Diagnosis.
In: Topics in Catalysis.
Bd. 56
(2013)
Heft 1-8
.
- S. 358-364.
ISSN 1572-9028
DOI: https://doi.org/10.1007/s11244-013-9980-x
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Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID Ohne Angabe MO 1060/6-2 Ohne Angabe MO 1060/13-1 Ohne Angabe FI 956/3-2 Ohne Angabe FI 956/5-1 |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft |
Abstract
The oxygen loading degree in TWCs, the amount of stored ammonia in SCR catalysts, the NOx loading degree in LNTs, or the soot loading of DPFs play a key role in automotive exhaust gas aftertreatment. Today’s methods determine the catalyst state indirectly. They utilize gas sensors installed up- or downstream of the catalysts and the catalyst state is inferred from the sensor signals. This overview reports on the status of an alternative approach based on the interaction of electromagnetic microwaves with the catalyst material. Since the catalyst state is strongly correlated with the electrical properties of the catalyst material itself, this concept shows a great potential.