Novel mixed potential sensor device to compare two gas compartments and to determine directly the conversion of an automotive catalyst

Titelangaben

Ritter, Thomas ; Hagen, Gunter ; Moos, Ralf:
Novel mixed potential sensor device to compare two gas compartments and to determine directly the conversion of an automotive catalyst.
2017
Veranstaltung: Sensor 2017 :18th International Conference on Sensors and Measurement Technology , 30.05.-01.06.2017 , Nürnberg, Deutschland.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Vortrag )
DOI: https://doi.org/10.5162/sensor2017/A6.4

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Abstract

In this work, a novel sensor device is developed. It enables to compare two gas compartments electrochemically by applying the mixed potential sensing principle. Thereby, disadvantages that come along with the usually-used half-cell setups like indirect heating, complicated manufacturing and only destructive dismantling of sample and sealing are overcome. The device bases on an yttria-stabilized zirconia disc that is equipped with an integrated heater to provide a hot area in the center for sensing while at the same time it is cold enough at the outer radius for contacting with a polymer sealing (Oring). As an example for its functionality, the gas mixtures up- and downstream of a catalyst were compared, while the sensor voltage orrelates well with catalyst conversion.