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NOx Measurement Errors in Ammonia-Containing Exhaust
Technical Paper
2007-01-0330
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Modern diesel aftertreatment systems may produce ammonia (NH3), especially in gas samples from midbed locations. NH3 causes significant measurement errors in NO, NO2, and NOx measurements for several NOx measurement technologies.
A standard addition test was run adding NO, NO2, and/or NH3 to a diesel engine exhaust. Chemiluminescent (CLD), FTIR, and chemical ionization mass spectrometer (CIMS) instruments were used in a designed experiment.
None of the instruments gave accurate, robust NOx measurement in the presence of high levels of NH3.
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Authors
- John Hoard - Ford Motor Company Research and Advanced Engineering
- Rachel Snow - Ford Motor Company Research and Advanced Engineering
- Lifeng Xu - Ford Motor Company Research and Advanced Engineering
- Christine Gierczak - Ford Motor Company Research and Advanced Engineering
- Robert Hammerle - Ford Motor Company Research and Advanced Engineering
- Cliff Montreuil - Ford Motor Company Research and Advanced Engineering
- S. Iskander Farooq - Ford Motor Company Research and Advanced Engineering
Topic
Citation
Hoard, J., Snow, R., Xu, L., Gierczak, C. et al., "NOx Measurement Errors in Ammonia-Containing Exhaust," SAE Technical Paper 2007-01-0330, 2007, https://doi.org/10.4271/2007-01-0330.Also In
References
- Colvin, A.D. Warnick, A. July 17 1973
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- Breitenbach L.P. Shelef M. “Development of a Method for the Analysis of NO 2 and NH 3 by NO-Measuring Instruments” Ford Scientific Research Staff Technical Report number SR71-130 September 27 1971
- Datatest Model 501 Chemiluminescent NOx Analyzer data sheet
- California Analytical Instruments Model 400 CLD data sheet
- Rosemount Analytical Model 951A NO/NOx Analyzer
- Fitz Dennis R. “Measurement of NOy and Potential Artifacts” University of California Riverside
- Nakatani S. Yoshimura T. Mori Y. Kihara N. Adachi M. Goto Y. Suzuki H. “Development of a Real-time NH 3 Gas Analyzer Utilizing Chemiluminescence Detection for Vehicle Emission Measurement” SAE Preprint 2004-01-2907