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Sampling and Physical Characterization of Diesel Exhaust Aerosols
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1977 by SAE International in United States
Annotation ability available
Diesel exhaust aerosols are highly dynamic and, therefore, difficult to sample without introducing falsification. This paper describes a study of these aerosols using a rapid dilution sampling system and an electrical aerosol analyzer. An Onan single cylinder indirect injection engine was used as an exhaust source. The sampler diluted the exhaust with clean air in ratios of 400:1 to 600:1 in order to prevent sample falsification by condensation and coagulation. The electrical aerosol analyzer was used to determine particle size and concentration. Volume concentration in the exhaust ranged from 2,000 to 50,000μ m3 cm-3 which correspond to mass loadings of 2.0 to 50 mg m-3 (assuming a density of 1 gm cm-3). Volume geometric mean diameters ranged from 0.12 to 0.19 μm.
Evaporation and coagulation effects on diesel aerosols were observed by aging in a Teflon holding bag. A simple evaporation model was fit to the decrease of aerosol volume concentration with time.
The fit revealed that the aerosols evaporated as if they were composed of normal paraffins in the 350-500 molecular weight range.
Although the sample dilution system used in this study may alter the sample somewhat, it is probably analogous to what happens at the tailpipe of a vehicle. Measurements taken on a test track in the exhaust plume of a Peugeot 504 diesel showed aerosol size distributions very similar to those measured in our laboratory studies.
CitationVerrant, J. and Kittelson, D., "Sampling and Physical Characterization of Diesel Exhaust Aerosols," SAE Technical Paper 770720, 1977, https://doi.org/10.4271/770720.
- Dolan D. F. Kittelson D. B. Whitby K. T. “Measurement of Diesel Exhaust Particle Size Distributions,” ASME Paper # 75-WA/APC-5, Air Pollution Control Division of ASME Houston, Texas November 30 December 4 1975
- Whitby K. T. Liu B. Y. H. “Polystyrene Aerosols: Electric Charge and Residue Size Distribution,” “Atoms Environment” 2 103 116 1968
- Whitby K. T. Clark W. E. “Electric Aerosol Particle Counting and Size Distribution Measuring System for the 0.015 to 1.0 μm Size Range,” Conducted under Division of Air Pollution Bureau of State Services December 16 1965
- Whitby K. T. Liu B. Y. H. Husar R. B. Barsic N.J. “The Minnesota Aerosol Analyzing System Used in the Los Angeles Smog Project,” “J. Collid Interface Science” 39 1 April 1972
- Whitby K. T. “Particle Statistics,” University of Minnesota Particle Technology Laboratory publication.
- Frey J. W. Corn M. “Physical and Chemical Characteristics of Particulates in a Diesel Exhaust,” Aerosol Technology Session, American Industrial Hygiene Association Annual Meeting Chicago, Illinois May 4 1967
- Fuchs N. A. “The Mechanics of Aerosols,” U.S. Department of Commerce, Office of Technical Services Washington, D. C. CWL Special Publications 4 12 1955
- Bird R.B. Steward W.E. Lightfoot E.N. “Transport Phenomena,” John Wiley and Sons, Inc. 1960 22 512
- Hirschfelder J. O. Bird R. B. Spotz E. L. “Chemical Revs.” 44 205 1949
- Hare C.T. Springer K.J. Bradow R. L. “Fuel and Additive Effects on Diesel Particulate Development and Demonstration of Methodology,” SAE Paper # 760130 Detroit, Michigan February 23-24 1976
- Broome D. Khan I. M. “The Mechanisms of Soot Release from Combustion of H-C Fuels with Particular Reference to the Diesel Engine,” Institute of Mechanical Engineers, Publication C 140 71 1971
- Kittelson David B. Dolan Daniel F. Verrant John A. “Investigation of a Diesel Exhaust Aerosol.” Paper 780109 SAE Automotive Engineering Congress Detroit February 1978
- Springer Karl J. Stahman Ralph C. “Diesel Car Emissions-Emphasis on Particulate and Sulfate.” Paper 770254 SAE Automotive Engineering Congress Detroit February 1977