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Catalyst State Observation via the Perturbation of a Microwave Cavity Resonator

Title data

Fischerauer, Gerhard ; Spörl, Matthias ; Gollwitzer, Andreas ; Wedemann, Marion ; Moos, Ralf:
Catalyst State Observation via the Perturbation of a Microwave Cavity Resonator.
In: Frequenz. Vol. 62 (August 2008) Issue 7-8 . - pp. 180-184.
ISSN 2191-6349
DOI: https://doi.org/10.1515/FREQ.2008.62.7-8.180

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationMO 1060/6-1
No informationFi 956/3–1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The state of the three-way catalyst (TWC) of a gasoline engine is commonly estimated by measuring the air-to-fuel ratio in the exhaust gas. This indirect method suffers from several disadvantages that one could avoid by directly observing the catalyst state and in particular its oxygen loading. We have investigated an RF approach to this direct measurement problem which is based on the tact that the TWC and its stainless steel canning form a filled cavity resonator. It will be shown that the resonator is perturbed when the TWC changes its conductivity as a function of oxygen loading and that the characteristics of the resonator S-parameters mirror the oxidation/reduction state of the catalyst.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Faculties > Faculty of Engineering Science > Chair Functional Materials
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Research Units
Research Institutions > Research Units > BERC - Bayreuth Engine Research Center
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 26 Jan 2015 15:26
Last Modified: 24 Feb 2016 07:20
URI: https://eref.uni-bayreuth.de/id/eprint/5733