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Oxidation of Soot Agglomerates in a Direct Injection Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1992 by SAE International in United States
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Carbon black particles, which morphologically and chemically simulate a diesel exhaust soot, were mixed with the intake air of a single-cylinder direct injection diesel engine to investigate the efficiency of their removal by oxidation in the combustion chamber. An aerosol generation system, which is capable of generating carbon black aerosol of a size distribution and mass flow rate comparable to those of the soot agglomerates, was developed first. The aerosol was then introduced into the engine which was operating on conventional fuel. Four methods were used to characterize the exhaust particles: an electrical aerosol analyzer, a condensation nuclei counter, a low volume filter, and a micro-orifice cascade impactor. The size distribution and concentration of the diesel soot particles in the lubricants were investigated by methods of photosedimentation and quantitative spectrophotometry, respectively. The net increase of carbon mass in the exhaust and lubricating oil due to the measured addition of carbon black was used to determine the net oxidation efficiency.
It was found that simulated particles (mass median diameter about 2 μm) can be consumed effectively inside the combustion chamber. The oxidation efficiency increases from 81% to 88% as equivalence ratio varies from 0.2 to 0.57 and decreases with increased engine speeds. The emissions of volatile material increased with the carbon addition. Approximately 5.5% by mass of added particles entered the lube oil, independent of engine duty cycles. Mass weighted particle size distributions in the exhaust shifted to the larger diameters due to carbon addition while those in the lube oil were not changed.
CitationKittelson, D., Sun, R., Blackshear, P., and Brehob, D., "Oxidation of Soot Agglomerates in a Direct Injection Diesel Engine," SAE Technical Paper 920111, 1992, https://doi.org/10.4271/920111.
SAE 1992 Transactions: Journal of Fuels & Lubricants
Number: V101-4; Published: 1993-09-01
Number: V101-4; Published: 1993-09-01
- Miller, P.R. Scholl, J. Bagley, S. Leddy, D. Johnson, J. “The Effects of a Porous Ceramic Particulate Trap on the Physical, Chemical and Biological Character of Diesel Particulate Emissions,” SAE Paper 830457 1983
- Horiuchi, M. Saito, K. Ichihara, S. “The Effects of Flow-through Type Oxidation Catalysts on the Particulate reduction of 1990's Diesel Engine,” SAE Paper 900600 1990
- Liu, B.Y.H. Kittelson, D.B. Dolan, D.F. Pui, D.Y.H. “Method and Apparatus for Reducing Particles Discharged by Combustion Means,” 1982
- Thimsen, D.P. Baumgard, K.J. Kittelson, D.B. Kotz, T.J. “The performance of an Electrostatic Agglomerator as a Diesel Soot Emission Control Device,” SAE Paper 900300 1990
- Kittelson, D.B. Reinertsen, J. Michalski, J. “Further Studies of Electrostatic Collection and Agglomeration of Diesel Particles,” SAE Paper 910329 1991
- Plee, S.L. Ahmad, T. Myers, J.P. “Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO x Emissions,” SAE Paper 811195 1981
- HMI, Inc. “Reduction of Diesel Particulates by Electrostatic Agglomeration, Inertial Collection, and Re-burning,” Final Report for EPA Contract #68D80053 1990
- Stairmand, C.J. “The Design and Performance of Cyclone Separators,” Transaction of Institution of Chemical Engineers 29 356 383 1951
- Dirgo, J. Leith, D. “Cyclone Collection Efficiency: Comparison of Experimental Results with Theoretical Predictions,” Aerosol Science, and Technology 4 401 415 1985
- Liu, B.Y.H. Pui, D.Y.H. “Electrical Neutralization of Aerosols,” J. Aerosol Science 5 465 72 1974
- Sun, R. Kettles, D.B. Blackshear, P.L. “Size Distribution of Diesel Soot In the Lubricating Oil,” SAE Paper 912344 1991
- Liu, B.Y.H. Ilori, T.A. “Aerosol Deposition in Turbulent Pipe Flow,” Environmental Science & Technology 8 4 1974
- Sun, R. Oxidation of Soot Agglomerates in a Direct Injection Diesel Engine University of Minnesota 1991
- Kittelson, D.B. Dolan, D.F. Verrant, J.A. “Investigation of a Diesel Exhaust Aerosol,” SAE Paper 780109 1978
- Kittelson, D.B. Johnson, J.H. “Variability in Particle Emission Measurements in the Heavy Duty Transient Test,” SAE Paper 910738
- Nagle, J. Strickland-Constable, R.F. “Oxidation of Carbon Between 1000-2000°C,” Proceeding of the Fifth Carbon Conference 1 154 164 1962
- Fenimore, C.P. Jones, G.W. “Oxidation of Soot by Hydroxyl Radicals,” J. Phys. Chem. 71 593 597 1967
- Pipho, M.J. Total Cylinder Sampling from a Diesel Engine University of Minnesota 1990
- Kittelson, D.B. Pipho, M.J. Ambs, J.L. Siegla, D.C. “Particle Concentrations in a Diesel Cylinder: Comparison of Theory and Experiment,” SAE Paper 861569 1986
- Blackshear P.L. Jr. Introduction to Combustion Lecture notes University of Minnesota 1988