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Real-Time Measurements of Diesel Vehicle Exhaust Particulate Using Photoacoustic Spectroscopy and Total Light Extinction
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Abstract
There is a clearly demonstrated need to develop “real-time” methods for the measurement of diesel vehicle particulate emissions. Optical techniques provide One alternative for such methodology because of the rapid data acquisition times involved and the relatively simple sampling methods that can be used. This report describes two different approaches to this problem. The first, the spectrophone, measures light absorption by the diluted exhaust plume using photoacoustic spectroscopy, and the second, the long pathlength smokemeter, determines total light extinction across the diluted exhaust plume. For the measurement of total mass emissions, both techniques show estimated errors of ±15% for specific vehicles, while for a multi-vehicle diesel fleet the estimated errors are ±20% and ±30% for the long pathlength smokemeter and the spectrophone, respectively. For the measurement of the “elemental” carbon content of the exhaust particulate, both instruments have estimated errors of ±10% for specific vehicles, while for the vehicle fleet the estimated errors are ±10% for the spectrophone and ±20% for the long pathlength smokemeter.
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Japar, S. and Szkarlat, A., "Real-Time Measurements of Diesel Vehicle Exhaust Particulate Using Photoacoustic Spectroscopy and Total Light Extinction," SAE Technical Paper 811184, 1981, https://doi.org/10.4271/811184.Also In
References
- “Standards for emission of particulate regulation for diesel-fueled light duty vehicles and light-duty trucks.” Federal Register 45 (no. 45). 14496 1980
- van de Hulst, H. C. “Light scattering by small particles.” New York, N. Y. John Wiley 1957
- Faxvog F. R. Roessler, D. M. “Carbon aerosol visibility vs particle size distribution.” Appl. Opt. 17 2612 1978
- Jantzen, J. “The refractive index of colloidal carbon.” J. Coll. Interface Sci. 69 436 1979
- Pierson, W. R. “Particulate organic matter and total carbon from vehicles on the road.” Proceedings, NSF/LBL Conference on Carbonaceous Particles in the Atmosphere Lawrence Berkeley Laboratory Berkeley, Ca 1979
- Truex, T. J. Pierson W. R. McKee, D. E. “Sulfate in diesel exhaust.” Env. Sci. Tech. 14 1118 1980
- Kittelson D. B. Dolan, D. F. “Diesel exhaust aerosol.”” Willike, K. “Generation of aerosols and facilities for exposure experiments.” Ann Arbor, Mi. Ann Arbor Science 1980
- Dolan D. F. Kittelson, D. B. “Diesel exhaust aerosol particle size distributions - comparison of theory and experiment.” SAE Paper 780110 1978
- Khatri N. J. Johnson, J. H. “Physical size distribution characterization of diesel particulate matter and the study of the coagulation process.” SAE Paper 780788 1978
- Khatri, N. J. Johnson J. H. Leddy, D. E. “The characterization of the hydrocarbon and sulfate fractions of diesel particulate matter.” SAE Paper 780111 1978
- Hare C. T. Baines, T. M. “Characterization of particulate and gaseous emissions from two diesel automobiles as functions of fuel and driving cycles.” SAE Paper 790424 1979
- Groblicki P. J. Begeman, C. R. “Particle size variation in diesel car exhaust.” SAE Paper 790421 1979
- Postulka A. Lies, K.-H. “Chemical characterization of particulates from diesel powered passenger cars.” SAE Paper 810083 1981
- Japar, S. M. Szkarlat A. C. Gorse, R.A. Jr. “Optical properties of particulate emissions from vehicles on the road.” Atm. Env. in press 1981
- Scherrer, H. C. Kittelson D. B. Dolan, D. F. “Light absorption measurements of diesel particulate matter.” SAE Paper 810181 1981
- Pao, Y.-H. “Optoacoustic spectroscopy and detection.” New York, N. Y. Academic Press 1977
- Rosencwaig, A. “ Photoacoustics and Photoacoustic Spectroscopy.” New York, N. Y. Wiley 1980
- Roessler D. M. Eaxvog, F. R. “Optoacoustic measurement of optical absorption in acetylene smoke.” J. Opt. Soc. Am. 69 1699 1979
- Terhune R. W. Anderson, J. E. “Spectrophone measurements of the absorption of visible light by aerosols in the atmosphere.” Opt. Lett. 1 70 1977
- Truex T. J. Anderson, J. E. “Mass monitoring of carbonaceous aerosols with a spectrophone.” Atm. Env. 13 507 1979
- Japar S. M. Killinger, D. K. “Photoacoustic and absorption spectrum of airborne carbon particulate using a tunable dye laser.” Chem. Phys. Lett. 66 207 1979
- Killinger, D. K. Moore J. Japar, S. M. “The use of photoacoustic spectroscopy to characterize and monitor soot in combustion processes.” ACS Symposium Series 134 457 1980
- Japar S, M. Szkarlat, A. C. “Measurement of diesel vehicle exhaust particulate using photoacoustic spectroscopy.” Comb. Sci. Tech. 24 215 1981
- Faxvog F. R. Roessler, D. M. “Optoacoustic measurements of diesel particulate emissions.” J. Appl. Phys. 50 7880 1979