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CH4-Sensitivity of Thermoelectric Gas Sensors

Title data

Wohlrab, Julia ; Hagen, Gunter ; Kohler, Heinz ; Moos, Ralf:
CH4-Sensitivity of Thermoelectric Gas Sensors.
2019
Event: Sensoren und Messsysteme 2019 , 25.-26.6.2019 , Nürnberg.
(Conference item: Conference , Poster )
DOI: https://doi.org/10.5162/sensoren2019/P1.23

Abstract in another language

Recently, thermoelectric gas sensors were used for in-situ determination of the CO/HC-content during wood burning. The sensors measure a thermoelectric voltage between a catalytically activated and an inert area. Since the reaction of hydrocarbons takes place exothermically at the catalytic layer, a temperature gradient is generated between the catalyst coating and the inert layer. At an operating temperature of 600°C, a linear relationship can be established between the hydrocarbon concentration and the sensor signal. With methane, however, a huge scattering occurs. Measurements have shown that the oxidation of the highly stable methane molecules at this catalyst just starts at 600°C. The sensitivity of the sensor to methane increases with increasing operating temperature up to 800°C. This information can also be used for a new operating strategy of the sensor.

Further data

Item Type: Conference item (Poster)
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
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 04 Jul 2019 06:31
Last Modified: 04 Jul 2019 06:31
URI: https://eref.uni-bayreuth.de/id/eprint/49813