This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Electrostatic Collection of Diesel Particles
Annotation ability available
Sector:
Language:
English
Abstract
Diesel particles carry charges ranging from 1-5 units of elementary charge per particle. The charge is bipolar, i.e., there are approximately equal numbers of positively and negatively charged particles. The charge distribution with respect to size follows a high temperature, Boltzmann equilibrium relationship. The first part of this paper describes charge measurements made on diesel particles emitted by three different diesel engines, and postulates a charging mechanism. The second part of the paper is an examination of how this natural charge may be used to collect particles from the exhaust. The charge level produced by combustion is only slightly lower than the charge level produced by the corona discharge in a conventional electrostatic precipitator. Thus, a simple electrostatic precipitator without a corona section will collect diesel particles affectively. The absence of a corona is a great advantage over a conventional precipitator because the corona is the main power consumer in an electrostatic precipitator. A model precipitator was built and tested on the exhaust from several engines. It was found _to be very effective after moving diesel particles with efficiencies ranging from 70-90%. Model tests and the design of a full scale particle collection device based on a corona-less electrostatic precipitator are described.
Recommended Content
Authors
Topic
Citation
Kittelson, D., Pui, D., and Moon, K., "Electrostatic Collection of Diesel Particles," SAE Technical Paper 860009, 1986, https://doi.org/10.4271/860009.Also In
References
- Dolan, D.F. Whitby K.T. Kittelson D.B. “Measurement of Diesel Exhaust Particle Size Distribution,” ASME Paper 75-WA/AC-5 1975
- Verrant, J.A. Kittelson D.B. “Sampling and Physical Characterization of Diesel Exhaust Aerosols,” SAE Paper No. 770720 1977 Trans. of the SAE 1978
- Knutson, E.O. Whitby K.T. “Aerosol Classification by Electric Mobility: Apparatus, Theory, and Application,” J. Aerosol Sci. 6 1975 554 451 Great Britain
- Liu, B.Y.H. Pui D.Y.H. “Equilibrium Bipolar Charge Distribution of Aerosol,” J. of Colloid and Interface Science 49 305 312
- Lawton, J. Weinberg F.J. Electrical Aspects of Combustion 1969 Clauendon Press Oxford
- Gaydon. A.G. Wolfhard H.G. Flames- Their Structure Radiation and Temperature 3rd Chapman and Hall, Ltd. London 1970
- Dolan, D.F. Kittelson D.B. Pui D.Y.H. “Diesel Exhaust Particle Size Distribution Measurement Technique,” SAE Paper No. 790492 1979
- Kittelson, D.B. Dolan D.F. “Diesel Exhaust Aerosols,” Generation of Aerosols and Facilities for Exposure Experiments Willeke K. Honolulu. Hawaii 1979 1980 337 359 Ann Arbor Science Press
- Moon, K.C. “Charging Mechanism of Sub-micron Diesel Particles,” Ph.D. Thesis University of Minnesota August 1984
- Van der Ziel. A. Fluctuation Phenomena in Semiconductors 1959 Butterworth's Scientific Publishing London 168
- Einbinder. H. “Generalized Equations for the Ionization of Solid Particles J. Chem. Phys. 26 4 1957 948
- White. H.J. “Particle Charging in Electrostatic Precipitation,” AIEE Trans. 70 1951 1186 1191
- Fuchs, N.A. Izv. Akad. Hauk.. SSR. Ser. Geogr. Geofiz. 11 1949 341
- Liu, B.Y.H. Pui D.Y.H. “Electrical Neutralization of Aerosols,” J. of Aerosol Science 5 1974 465 472
- Liu, B.Y.H. Pui D.Y.H. “On Unipolar Charging of Aerosols in the Continuum Regime,” J. of Colloid and Interface Science 58 1977 142 149
- Yeh. H.C. Cheng Y.S. “Theoretical Study of Equilibrium Bipolar Charge Distribution on Nonuniform Primary Straight Chain Aggregate Aerosols,” J. Aerosol Science & Tech. 2 383 388 1983
- Lawton, J. Weinberg F.J. Proc. Roy. Soc. Lond. A277 1964 468
- Dolan, D.F. “Experimental Theoretical Investigation of Diesel Exhaust Particulate Matter,” Ph.D. Thesis University of Minnesota 1977
- Adachi, M. Okuyama K. Kousaka Y. “Electrostatic Coagulation of Bipolar Charaged Aerosol Particles,” J. Chem. Engineering of Japan 14 6 1981
- Green, J.A. Sugden T.M. Ninth Int. Symp. Combustion 1963 Academic Press London and New York
- Kittelson, D.B. Moon K.C. “Electrostatic Charge on Diesel Particles,” paper to be presented at Second International Aerosol Conference Berlin 1986
- Liu, B.Y.H. Kittelson D.B. Pui D.Y.H. Dolan D.F. U.S. Patent: “Method and Apparatus for Reducing Partaicles Discharged by Combustion Means” 1979
- Polack, W. Hägele K.H. “Erste Erge-bnisse mit dem Electrostatischen Russabscheider an einen PKW-Dieselmotor, Paper No. 845080 FISTA Congress 1984
- Deutsch, W. “Motion and Charge of Electrostatic Carriers in a Cylindrical Condenser,” Ann. Physik 1922 68 335 344
- Gibbs, R. Whitby R. Johnson R. “Experimental Measurement of Diesel Operated with Particulate Laden Intake Air,” Fall Technical Meeting Eastern Section of Combustion Institute Philadelphia, PA November 1985