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Determination of the NOx Loading of an Automotive Lean NOx Trap by Directly Monitoring the Electrical Properties of the Catalyst Material Itself

Title data

Fremerey, Peter ; Reiß, Sebastian ; Geupel, Andrea ; Fischerauer, Gerhard ; Moos, Ralf:
Determination of the NOx Loading of an Automotive Lean NOx Trap by Directly Monitoring the Electrical Properties of the Catalyst Material Itself.
In: Sensors. Vol. 11 (2011) Issue 9 . - pp. 8261-8280.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s110908261

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationFI 956/3-1, FI 956/5-1, MO 1060/6-1, and MO 1060/13-1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Recently, it has been shown that the degree of loading of several types of automotive exhaust aftertreatment devices can be directly monitored in situ and in a contactless way by a microwave-based method. The goal of this study was to clarify whether this method can also be applied to NOx storage and reduction catalysts (lean NOx traps) in order to obtain further knowledge about the reactions occurring in the catalyst and to compare the results with those obtained by wirebound NOx loading sensors. It is shown that both methods are able to detect the different catalyst loading states. However, the sensitivity of the microwave-based method turned out to be small compared to that previously observed for other exhaust aftertreatment devices. This may limit the practical applicability of the microwave-based NOx loading detection in lean NOx traps.

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 > ZET - Zentrum für Energietechnik
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: 19 Jan 2015 12:26
Last Modified: 28 Feb 2019 08:48
URI: https://eref.uni-bayreuth.de/id/eprint/5600