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Performance Improvement of Diesel Particulate Filter by Layer Coating
Technical Paper
2012-01-0842
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Nowadays diesel particulate filters (DPFs) with catalyst coatings have assumed one of the most significant roles for road vehicle emission control. DPFs made of re-crystallized SiC (SiC-DPFs) have guaranteed the soot filtration efficiency for the current regulation. In order to further enhance their filtration efficiency, even though a higher porosity and larger pore size must be adopted for sufficient catalyst coating capacity, we developed the concept of a filtration layer on the DPF inlet channel walls and researched its performance both theoretically and experimentally. First of all, models of the new filtration layer, closely resembling the real one made in the laboratory, were digitally reconstructed and soot deposition simulations were conducted. According to the results, the pore size of the filtration layer providing the target filtration efficiency is found to be between the characteristic soot particle size (of order 100 nm) and the nominal DPF wall pore size (of order 10 μm). Additionally, it is shown that the optimum spatial distribution of filtration layer thickness along DPF length should be matched to the filtration velocity distribution. Finally we experimentally verified the performances of SiC-DPF with filtration layer by engine bench tests. We found that very high filtration efficiency is attained while it is shown that the concept presented can bring 3 significant advantages through its use: a high initial filtration efficiency of 97% in spite of a higher porosity SiC-DPF wall, an 18% decrease of transient pressure drop at 4 g/L soot mass in DPF without increased initial pressure drop due to a deep-bedding of soot, and a repeatability of transient pressure drop after several loading-regeneration cycles.
Authors
Citation
Nakamura, K., Vlachos, N., Konstandopoulos, A., Iwata, H. et al., "Performance Improvement of Diesel Particulate Filter by Layer Coating," SAE Technical Paper 2012-01-0842, 2012, https://doi.org/10.4271/2012-01-0842.Also In
References
- Karadimitra, K. Macheridou, G. Papaioannou, E. Konstandopoulos, A.G. “Ceria Nanoparticle Coated Filters for Soot Emission Control,” International Congress for Particle Technology 2001
- Karadimitra, K. Lorentzou, S. Agrafiotis, C. Konstandopoulos, A.G. “Catalytic Particle Synthesis via Aerosol Spray Pyrolysis and In-Situ Deposition on Porous Filter Materials,” International Congress for Particle Technology 2004
- Konstandopoulos, A. Papaioannou, E. Zarvalis, D. Skopa, S. et al. “Catalytic Filter Systems with Direct and Indirect Soot Oxidation Activity,” SAE Technical Paper 2005-01-0670 2005 10.4271/2005-01-0670
- Konstandopoulos, A. Lorentzou, S. Pagkoura, C. Boettcher, J. “Advanced Catalyst Coating Technology for Porous Substrates,” SAE Technical Paper 2007-01-1951 2007 10.4271/2007-01-1951
- Konstandopoulos, A. Lorentzou, S. Pagkoura, C. Ohno, K. et al. “Sustained Soot Oxidation in Catalytically Coated Filters,” SAE Technical Paper 2007-01-1950 2007 10.4271/2007-01-1950
- Ogyu, K. Oya, T. Ohno, K. Dolios, I. et al. “Study on Catalyzed-DPF for Improving the Continuous Regeneration Performance and Fuel Economy,” SAE Technical Paper 2007-01-0919 2007 10.4271/2007-01-0919
- Lorentzou, S. Pagkoura, C. Zygogianni, A. Kastrinaki, G. et al. “Catalytic Nano-structured Materials for Next Generation Diesel Particulate Filters,” SAE Int. J. Mater. Manuf. 1 1 189 198 2009 10.4271/2008-01-0417
- Lorentzou, S. Pagkoura, C. Konstandopoulos, A. Boettcher, J. “Advanced Catalyst Coatings for Diesel Particulate Filters,” SAE Technical Paper 2008-01-0483 2008 10.4271/2008-01-0483
- Ogyu, K. Oya, T. Ohno, K. Konstandopoulos, A. “Improving of the Filtration and Regeneration Performance by the Sic-DPF with the Layer Coating of PM Oxidation Catalyst,” SAE Technical Paper 2008-01-0621 2008 10.4271/2008-01-0621
- Vlachos, N. Konstandopoulos, A. “Digital Materials Methods for DPF Development,” SAE Technical Paper 2006-01-0260 2006 10.4271/2006-01-0260
- Konstandopoulos, A. Vlachos, N. Patrianakos, G. “Application of Digital Material Methods to Silicon Carbide Diesel Particulate Filters,” SAE Technical Paper 2007-01-1131 2007 10.4271/2007-01-1131
- Fukushima, S. Ohno, K. Vlachos, N. Konstandopoulos, A. “New Approach for Pore Structure and Filtration Efficiency Characterization,” SAE Technical Paper 2007-01-1918 2007 10.4271/2007-01-1918
- Torquato, S. “Random Heterogeneous Materials: Microstructure and Macroscopic Properties,” Springer-Verlag New York 2001 0-387-95167-9
- Filipov, A. V. Zurita, M. Rosner, D. E. “Fractal-like Aggregates: Relation between Morphology and Physical Properties,” Journal of Colloid and Interface Science 229 261 273 2000
- Konstandopoulos, A. Johnson, J. “Wall-Flow Diesel Particulate Filters-Their Pressure Drop and Collection Efficiency,” SAE Technical Paper 890405 1989 10.4271/890405
- Konstandopoulos, A. Kostoglou, M. Skaperdas, E. Papaioannou, E. et al. “Fundamental Studies of Diesel Particulate Filters: Transient Loading, Regeneration and Aging,” SAE Technical Paper 2000-01-1016 2000 10.4271/2000-01-1016
- Konstandopoulos, A. Kostoglou, M. Vlachos, N. Kladopoulou, E. “Progress in Diesel Particulate Filter Simulation,” SAE Technical Paper 2005-01-0946 2005 10.4271/2005-01-0946
- Konstandopoulos, A.G. Kostoglou, M. Vlachos, N. Kladopoulou, E. “Advances in the Science and Technology of Diesel Particulate Filter Simulation,” Advances in Chemical Engineering 33 213 294 2008 10.1016/S0065-2377(07)33004-4
- Papaioannou, E. Konstandopoulos, A.G. “Update on the Science and Technology of Diesel Particulate Filters,” KONA Powder and Particle Journal 26 36 65 2008
- Konstandopoulos, A. Skaperdas, E. Warren, J. Allansson, R. “Optimized Filter Design and Selection Criteria for Continuously Regenerating Diesel Particulate Traps,” SAE Technical Paper 1999-01-0468 1999 10.4271/1999-01-0468
- Konstandopoulos, A. Skaperdas, E. Masoudi, M. “Inertial Contributions to the Pressure Drop of Diesel Particulate Filters,” SAE Technical Paper 2001-01-0909 2001 10.4271/2001-01-0909
- Konstandopoulos, A. Vlachos, N. Housiada, P. Kostoglou, M. “Simulation of Triangular-Cell-Shaped, Fibrous Wall-Flow Filters,” SAE Technical Paper 2003-01-0844 2003 10.4271/2003-01-0844