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Radio frequency based monitoring of SCR and three way catalysts - a novel tool to get insight into catalyst behavior : Update on recent advances

Title data

Moos, Ralf ; Rauch, Dieter ; Votsmeier, Martin ; Kubinski, David J.:
Radio frequency based monitoring of SCR and three way catalysts - a novel tool to get insight into catalyst behavior : Update on recent advances.
2015
Event: CAPoC10 - 10th International Congress on Catalysis and Automotive Pollution Control , 28.-30.10.2015 , Brussels, Belgium.
(Conference item: Conference , Speech )

Project information

Project title:
Project's official titleProject's id
No informationMo 1060/19-1
No informationMo 1060/13-1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Knowledge of the actual catalyst state plays a key role in automotive exhaust gas aftertreatment. The oxygen loading degree of three-way catalysts (TWC), the amount of stored ammonia in SCR catalysts, or the NOx loading degree in NSCs are important parameters. Today, they are determined indirectly and/or model-based, applying models that are typically calibrated by gas sensors installed up- and/or downstream of the catalysts. A novel approach to determine directly the catalyst state by microwaves (radio frequencies, rf) emerged recently. For this method, the catalyst housing serves as an electrical cavity resonator. As “sensor”, one or two simple antennas are mounted in the canning. The electrical properties of the honeycomb incl. coating change with gas loading, affecting either the resonance frequencies or the power transmission. Such contactlessobtained information is strongly correlated with the catalyst state as will be discussed here for TWC and SCR systems. While initial studies were overviewed during past CAPoC in 2012, this contribution reviews the enormous progress in the past 3 years.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions > Research Units > BERC - Bayreuth Engine Research Center
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 Jan 2016 07:23
Last Modified: 18 Apr 2016 07:12
URI: https://eref.uni-bayreuth.de/id/eprint/29008