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Selective Ammonia Exhaust Gas Sensor for Automotive Applications

Title data

Moos, Ralf ; Müller, Ralf ; Plog, Carsten ; Knezevic, Aleksandar ; Leye, Holger ; Irion, Eckard ; Braun, Tillmann ; Marquardt, Klaus-Jürgen ; Binder, Klaus:
Selective Ammonia Exhaust Gas Sensor for Automotive Applications.
Universität Bayreuth / Lehrstuhl für Funktionsmaterialien
In: Sensors and Actuators B: Chemical. Vol. 83 (2002) Issue 1-3 . - pp. 181-189.
ISSN 0925-4005

Official URL: Volltext

Abstract in another language

In order to meet future NOx emission standards for commercial vehicles, so called urea selective catalytic reduction (SCR) systems will be introduced. In the SCR converter ammonia serves as a reducing agent for selective NOx reduction. An ammonia exhaust gas sensor is required to optimize the injected amount of urea and to assure that no ammonia emissions occur. This paper reports on the development of a selective thick film ammonia sensor that can meet the requirements for applications in automotive exhaust gas. Main topic is the development of the functional gas sensitive film. Zeolites were successfully investigated as selective functional materials for this kind of sensors. It is shown, that the type of the zeolite, its module, the working temperature and the working frequency determine sensitivity and selectivity of the sensor. From the most promising zeolite material—zeolite H-ZSM5 with a module of 140, sensors were manufactured and tested in engine test benches. It could be shown, that this kind of sensors is a useful tool to control an ammonia-SCR system and to detect ammonia slip.

Further data

Item Type: Article in a journal
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
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Feb 2015 07:15
Last Modified: 13 Nov 2015 10:16