bei Google ScholarTitelangaben
Fischerauer, Gerhard ; Gollwitzer, Andreas ; Nerowski, Alexander ; Spörl, Matthias ; Reiß, Sebastian ; Moos, Ralf:
Monitoring of Electrochemical Processes in Catalysts by Microwave Methods.
In: Lindenmeier, Stefan ; Weigel, Robert
(Hrsg.):
Electromagnetics and network theory and their microwave technology applications :
a tribute to Peter Russer. -
Berlin
: Springer
,
2011
. - S. 119-132
ISBN 978-3-642-18374-4
DOI: https://doi.org/10.1007/978-3-642-18375-1_9
Abstract
Modern vehicles driven by a gasoline engine make use of the three-way catalyst (TWC) to eliminate noxious gas components like CO, HC or NOx from the exhaust gas. Such a catalyst consists of a dielectric honeycomb-like matrix coated with an oxygen-storing component such as ceria (an n-type semiconductor) and possibly a catalytically active noble metal such as platinum. The efficient removal of noxious gases calls for a normalized air-to-fuel ratio lambda of one. This cannot be achieved in practice, but by running the engine alternately in lean mode (more air than needed for complete combustion; lambda > 1 ) and in rich mode (more fuel than needed for complete combustion; lambda < 1) at least the time average of lambda can be made to take on the desired value of one. Under proper working conditions, the amplitude of the oscillations in lambda is much smaller downstream of the catalyst than upstream. [...]
Weitere Angaben
| Publikationsform: | Aufsatz in einem Buch |
|---|---|
| Begutachteter Beitrag: | Nein |
| Zusätzliche Informationen: | Kapitel 9 des Buches. |
| Keywords: | Three-way catalyst; TWC; microwave cavity resonator; resonance frequency; perturbation; S-parameters; measurement; state estimation; in situ; cableless |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 29 Feb 2016 13:46 |
| Letzte Änderung: | 29 Feb 2016 13:46 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/31223 |