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Evaluation of an UV Analyzer for NOX Vehicle Emission Measurement
Technical Paper
2001-01-0213
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Chemiluminescense detectors (CLD) represent well-established instruments to measure the concentrations of the oxides of nitrogen (NOx) in raw as well as diluted automotive exhaust in accordance with the regulations in the United States of America and the European Community. Although the CLD offers the benefits of wide measuring ranges down to low concentrations with a fast response time, its drawbacks are characterized by quenching effects caused by carbon dioxide and water, by an adverse cost-benefit ratio, by the fact that ozone, a highly toxic gas, is necessary for operation, and by additional components needed, such as vacuum pumps and deozonizer. As a consequence, car manufacturers and agencies are looking for alternative analyzers for the measurement of NO in raw exhaust gas. Ultra-violet (UV) analyzers have potential to replace the CLD, as they offer advantages like low noise, no water and CO2 interference, less equipment for operation and reduced costs.
This paper presents investigations on a new UV-analyzer for analysis of NOx and its potential for the detection of other compounds.
A detailed comparison of NOx measurements operating on an UV-spectroscopy based analyzer parallel to a standard CLD device is given. The experiments are performed under realistic conditions on an engine- and chassis test cell at various applications. Long-run data on t90-times, drift, repeatability, etc are presented and discussed. Moreover, both instruments have been tested at both, steady state and transient tests. A discussion of the respective data is presented and the correlation is analyzed. Additionally the analyzer specifications are determined and compared against the CLD device.
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Authors
- J. D. Baronick - Volkswagen AG, Germany
- B. Heller - Volkswagen AG, Germany
- G. Lach - Volkswagen AG, Germany
- F. Bogner - AVL List GmbH, Austria
- U. Gerspach - AVL List GmbH, Austria
- H. Schimpl - AVL List GmbH, Austria
- D. Gruber - AVL List GmbH, Austria
- W. Fabinski - ABB Analytical, Germany
- M. Moede - ABB Analytical, Germany
- M. Zöchbauer - ABB Analytical, Germany
Citation
Baronick, J., Heller, B., Lach, G., Bogner, F. et al., "Evaluation of an UV Analyzer for NOX Vehicle Emission Measurement," SAE Technical Paper 2001-01-0213, 2001, https://doi.org/10.4271/2001-01-0213.Also In
References
- Herzberg G. Molecular Spectra and Molecular Structure Spectra of Diatomic Molecules 1950 Infrared and Raman Spectra of Polyatomic Molecules 1945 Electronic Spectra and Electronic Structure of Polyatomic Molecules 1967 Van Nostrand, Princeton, NJ
- Bass A.M. Ledford, A.E. Jr Laufer A.H. Extinction Coefficcients of NO 2 and N 2 O 4 J. Res. Natl. Bur. Stand. Sect. A 80 143 1976
- Finlayson-Pitts B.J. Pitts, J.N. Jr. Atmospheric Chemistry - Fundamentals and Experimental Techniques 1986 John Wiley & Sons New York
- Steinfeld J.I. Molecules and Radiation MIT Press London 1989
- Gilmore F.R. Laher R.R. Espy P.J. Franck-Condon Factors r-centroids, electronic transition moments, and Einstein coefficients for many nitrogen and oxygen band systems Journal of Physical and Chemical Reference Data 21 1005 1992
- Meinel H. Detection of Nitric Oxide by resonance technique Z. Naturforsch 30a 1975 232 328
- Calcaterra D. Oliver M. Zoeschg R. Gruber D. On Bridging the Gap of Communication Between Test Bed Equipment: Global Emissions Management SAE 2000 World Congress, 2000-01-0799