New advanced in situ carbon monoxide sensor for the process application

Mixed potential solid electrolyte CO sensors with sensing electrodes based on composite with various semiconducting oxides were extensively studied in the temperature range 500–650 °C for sensitivity, stability and cross-sensitivity besides CO to other combustion components like CO 2 , H 2 O, O 2 ,...

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Bibliographic Details
Published in:Ionics 2009-04, Vol.15 (2), p.131-138
Main Authors: Shuk, P., Bailey, E., Zosel, J., Guth, U.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Optical and Electronic Materials
Original Paper
Renewable and Green Energy
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Summary:Mixed potential solid electrolyte CO sensors with sensing electrodes based on composite with various semiconducting oxides were extensively studied in the temperature range 500–650 °C for sensitivity, stability and cross-sensitivity besides CO to other combustion components like CO 2 , H 2 O, O 2 , and SO 2 . The highest CO sensitivity was found for the CO sensor with composite electrode based on Au/Ga 2 O 3 showing also good reproducibility and stability in hazardous combustion environment. CO sensor response behavior in non equilibrated oxygen containing gas mixtures is mainly determined by the catalytic activity of the measuring electrode and depends strongly on preparation and measuring conditions. Mixed oxides based on doped chromites show only a little sensitivity to CO. CO sensor based on Au/Ga 2 O 3 composite electrodes was showing good CO selectivity in the presence of other combustion gas species and finally was tested in combustion environment at power plant.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-008-0274-4