Ammonia flue gas sensors for SCR applications : A comparison between zeolite-based capacitive sensors and mixed-potential sensors utilizing vanadia-based electrodes

Titelangaben

Moos, Ralf ; Wöhrl, Thomas ; Donker, Nils ; Schönauer-Kamin, Daniela ; Hagen, Gunter:
Ammonia flue gas sensors for SCR applications : A comparison between zeolite-based capacitive sensors and mixed-potential sensors utilizing vanadia-based electrodes.
2025
Veranstaltung: Eurosensors XXXVII , September 7-10, 2025 , Wroclaw, Poland.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Vortrag )
DOI: https://doi.org/10.5162/EUROSENSORS2025/T5.1.2

Volltext

Link zum Volltext (externe URL):

Abstract

Two different, planar, and very selective ammonia sensor types are compared in this study with regard to their applicability in flue gas from biomass combustion processes: a YSZ-based mixed potential sensor and a zeolite-based capacitive sensor. Both are operated at several hundred °C. The zeolite sensor shows a small cross-sensitivity to water vapor, whereas the signal of the mixed-potential sensor depends on O₂, especially at lower oxygen concentrations. In both cases the signal can be corrected by a lambda-probe. Both sensors behave well in real exhausts, both in flue gas and in real engine exhausts.