This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Filtration Behavior of Diesel Particulate Filters (1)
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
Annotation ability available
This paper is Part-1 of two papers discussing the filtration behavior of diesel particulate filters. Results of the fundamental study are presented in Part-1, and test results for real size DPFs are reported in the supplement, Part-2. In this paper, a fundamental experimental study was performed on the effect of pore size and pore size distribution on the PM filtration efficiency of the ceramic, wall-flow Diesel Particulate Filter (DPF). Small round plates of various average mean pore sizes (4.6, 9.4, 11.7, 17.7 micro-meters) with a narrow pore size distribution were manufactured for the tests. During the DPF filtration efficiency tests, ZnCl2 particles in the range of 10 nm to 500 nm were used instead of PM from actual diesel engine exhaust. ZnCl2 particles were made using an infrared furnace and separated into monodisperse particles by DMA (Differential Mobility Analyzer). Various ZnCl2 particle sizes were introduced upstream of the test plates and particle numbers were counted at the upstream and the downstream positions to determine filtration efficiency. In addition, theoretical calculations were made for the collection mechanisms of i) diffusion, ii) interception and iii) inertia. The theoretical calculations were compared with the experimental test results. On-engine testing of a DPF, with optimum pore size distribution, demonstrated overall filtration efficiency of >90% during preconditioning operation of the NEDC test cycle. The potential of the deep-bed filtration model for predicting filtration efficiency of wall-flow type ceramic DPFs was confirmed. Additional vehicle tests were performed on DPFs with various pore structures. The results are shown and discussed in the Part-2.
- E. Ohara - NGK Insulators, Ltd.
- Y. Mizuno - NGK Insulators, Ltd.
- Y. Miyairi - NGK Insulators, Ltd.
- T. Mizutani - NGK Insulators, Ltd.
- K. Yuuki - NGK Insulators, Ltd.
- Y. Noguchi - NGK Insulators, Ltd.
- T. Hiramatsu - NGK Insulators, Ltd.
- M. Makino - NGK Insulators, Ltd.
- A. Takahashi - NGK Insulators, Ltd.
- H. Sakai - NGK Insulators, Ltd.
- M. Tanaka - NGK Automotive Ceramics USA, Inc.
- A. Martin - NGK Automotive Ceramics USA, Inc.
- S. Fujii - NGK Automotive Ceramics USA, Inc.
- P. Busch - NGK Automotive Ceramics USA, Inc.
- T. Toyoshima - NGK Europe GmbH
- T. Ito - NGK Europe GmbH
- I. Lappas - NGK Europe GmbH
- C. D. Vogt - NGK Europe GmbH
CitationOhara, E., Mizuno, Y., Miyairi, Y., Mizutani, T. et al., "Filtration Behavior of Diesel Particulate Filters (1)," SAE Technical Paper 2007-01-0921, 2007, https://doi.org/10.4271/2007-01-0921.
- Otani et.al. “Experimental Study of Aerosol Filtration by the Granular Bed Over a Wide Range of Reynolds Numbers” Aerosol Sience and Technology 10 463 474 1989
- Tardos, G.T. Abuaf, N. Gutfinger, C. “Dust Deposition in Granular Bed Filters:Theories and Experiments” J.Air Pollut. Control Assoc. 28 354 1978
- Parctsky, L. Theodore, L. Pfelfer, R. Squires, A.M. “Panel Bed Filters for Simultaneous Removal of Flt Ash and Sulfer Diaxide: II. Filtration of Dilute Aerosols by Sand Beds” ,J.Air pollut.Control assoc. 21 204 1971
- Pendse, J. Tien, C. “General Correlation of the Initial Collection Efficiency of Granular Filter Beds” AIChE J. 28 677 1982
- Mann, L..A. goren, S.L. “Aerosol Capture in Granular Beds in the Sedimentation and Diffusion Dominated Regimes” Aerosol Sci. Technol. 3 195 1984
- Knettig, P. Beeckmans, A.M. “Inertial Capture of Aerosol Particles by Swarms of Accelerating Spheres” J.Aerosol. Sci. 5 225 1974
- Kennard, M.L.. Miesen. A. “Aerosol Collection in Granular Beds” 2 nd World Filtration Congr. 229 1979
- Gebhart, J. Roth. C. Stahlhofen, W. “Filtration Properties of Glass Bed media for Aerosol Particles in the 0.1-2μm Size Range” J. Aeosol Aci. 4 355 1973
- Gal, E. Tardos, G. Pfeffer, R. “A Study of Inertial Effects in Granular Bed Filtration” AIChE J. 31 1093 1985
- Ranz, W.E. Wong “Impaction of Dust and Smoke Particles” J.B.Ind.Eng.Chem. 44 1371 1952
- Kanaoka, C. Yoshioka, N. Iinoya, K. Emi, H. “Inertial Capture of Aerosol Particles by Single Sphere” Kagaku Kougaku 36 104 1972
- Hashimoto, S. Miyairi, Y. Hamanaka, T. et.al. “SiC and Cordierite Diesel Particulate Filters Designed for Low Pressure Drop and Catalyzed, Uncatalyzed Systems” SAE Paper: 2002-01-0322