Compact electrochemical bifunctional NOx/O2 sensors with internal reference for high temperature applications
A bifunctional total NOx and O2 sensor assembly with an internal reference for high temperature sensing. Two electrochemical total NOx(NO+NO2) measuring systems and method were coupled with a metal/metal oxide internal oxygen reference to detect O2 and NOx simultaneously in a combustion environment using a single sensor. A Pd/PdO-containing reference chamber was sealed within a stabilized zirconia superstructure by a high pressure/temperature bonding method. An amperometric and potentiometric NOx sensor assembly was built on the outside of the Pd/PdO chamber. Pt-loaded zeolite Y was used to obtain total NOx capacity and also to cover the Pt electrodes for detecting oxygen in the presence of NOx.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-06CH11357; FC26-03NT41615; W-31109-ENG-38
- Assignee:
- UChicago Argonne, LLC (Chicago, IL)
- Patent Number(s):
- 8,012,323
- Application Number:
- 12/402,216
- OSTI ID:
- 1531694
- Country of Publication:
- United States
- Language:
- English
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