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Effects of Washcoat on Initial PM Filtration Efficiency and Pressure Drop in SiC DPF
Technical Paper
2011-01-0817
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The washcoat (W/C) on a catalytic diesel particulate filter (DPF) greatly alters the pore structure and wall surface condition of the original substrate of DPF, which then affects the filtration efficiency and pressure drop behavior. In the present study, we examined this W/C effect on the initial PM filtration efficiency and pressure loss by changing amounts of washcoat on a SiC-DPF. We measured particle number concentration and particle size distribution in the diesel exhaust gas downstream of the DPF by EEPS. High filtration efficiency was achieved quickly when the W/C amount was increased. We introduced new parameters, T90 and T99, which were the filtration efficiencies that reach more than 90% and 99%, respectively, of the initial DPF usage. The PM trapping mechanisms could be classified according to the PM size. Trapping of PM whose diameter is smaller than 30 nm is little affected by the W/C. However, for PM over 30 nm, as amounts of W/C are increased, particle number concentration decreases rapidly and less PM leakage is observed for the initial filtration process. On the other hand, the initial backpressure and the backpressure during soot loading increased in accordance with W/C amount. Since the relationship between the filtration efficiency and the pressure loss has a trade-off, it is important to design DPF by considering W/C effects.
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Tsuneyoshi, K., Takagi, O., and Yamamoto, K., "Effects of Washcoat on Initial PM Filtration Efficiency and Pressure Drop in SiC DPF," SAE Technical Paper 2011-01-0817, 2011, https://doi.org/10.4271/2011-01-0817.Also In
References
- Wirojsakunchai, E. Schroeder, E. Kolodziej, C. Foster, D.E. et al. “Detailed Diesel Exhaust Particulate Characterization and Real-Time DPF Filtration Efficiency Measurements During PM Filling Process,” SAE Technical Paper 2007-01-0320 2007 10.4271/2007-01-0320
- Karin, P. Cui, L. Rubio, P. Tsuruta, T. et al. “Microscopic Visualization of PM Trapping and Regeneration in Micro-Structural Pores of a DPF Wall,” SAE Int. J. Fuels Lubr. 2 1 661 669 2009 10.4271/2009-01-1476
- Tsuneyoshi, K. Takagi, O. Yamamoto, K. “Effect of Surface Roughness on Initial PM Filtration Efficiency of DPF,” Transactions of the Japan Society of Mechanical Engineers 76 767 100 107 2010
- Yamamoto, K. Oohori, S. Yamashita, H. Daido, S. “Simulation on Soot Deposition and Combustion in Diesel Particulate Filter,” Proceedings of the Combustion Institute Volume 32 The Combustion Institute 1965 1972 2009
- Yamamoto, K. Satake, S. Yamashita, H. “Microstructure and Particle-laden Flow in Diesel Particulate Filter,” Int. J. Thermal Sciences 48 303 307 2009
- Yamamoto, K. Nakamura, M. Yane, H. Yamashita, H. “Simulation on Catalytic Reaction in Diesel Particulate Filter,” Catalysis Today 153 118 124 2010
- Merkel, A. G. Cutler, A. W. Tao, T. Chiffey, A. Phillips, P. Twigg, V. M. Walker, A. “New Cordierite Diesel Particulate Filters for Catalyzed and Non-Catalyzed Applications,” 9th Diesel Engine Emissions Reduction Conference 2003
- Kuwajima, M. Okawara, S. Tsuzuki, M. Yamaguchi, M. et al. “Analysis of Sophisticated DPNR Catalyst, Focused on PM Particle Number Emissions,” SAE Technical Paper 2009-01-0290 2009 10.4271/2009-01-0290
- Daido, S. Takagi, N. “Visualization of the PM Deposition and Oxidation Behavior Inside the DPF Wall,” SAE Technical Paper 2009-01-1473 2009 10.4271/2009-01-1473
- Lorentzou, S. Pagkoura, C. Konstandopoulos, G.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. Konstandopolous, G.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
- Ohyama, N. Nakanishi, T. Daido, S. “New Concept Catalyzed DPF for Estimating Soot Loadings from Pressure Drop,” SAE Technical Paper 2008-01-0620 2008 10.4271/2008-01-0620
- Fukushima, S. Ohno, K. Vlachos, N. Konstandopoulos, A.G. “New Approach for Pore Structure and Filtration Efficiency Characterization,” SAE Technical Paper 2007-01-1918 2007 10.4271/2007-01-1918
- Mey, D. Andy, P. Tardivat, C. Augier, C. et al. “Improved DPF Substrate for Washcoat Accommodation,” SAE Technical Paper 2009-01-0288 2009 10.4271/2009-01-0288
- Stary, T. Solcova, O. Schneider, P. Marek, M. “Effective diffusivities and pore-transport characteristics of washcoated ceramic monolith for automotive catalytic converter,” Chemical Engineering Science 61 5934 5943 2006
- Zarvalis, D. Lorentzou, S. Konstandopoulos, G.A. “A Methodology for the Fast Evaluation of the Effect of Ash Aging on the Diesel Particulate Filter Performance,” SAE Technical Paper 2009-01-0630 2009 10.4271/2009-01-0630
- Ohara, E. Mizuno, Y. Miyairi, Y. Mizutani, T. et al. “Filtration Behavior of Diesel Particulate Filters (1),” SAE Technical Paper 2007-01-0921 2007 10.4271/2007-01-0921
- Hayashi, H. Kubo, S. “Computer simulation study on filtration of soot particles in diesel particulate filter,” Computers & Mathematics , Application 55 1450 1460 2008
- Zuberi, B. Liu, J.J. Pillai, S.C. Weinstein, J.G. et al. “Advanced High Porosity Ceramic Honeycomb Wall Flow Filters,” SAE Technical Paper 2008-01-0623 2008 10.4271/2008-01-0623
- Taoka, N. Ohno, K. Hong, S. Sato, H. et al “Effect of SiC-DPF with High Cell Density for Pressure Loss and Regeneration,” SAE Technical Paper 2001-01-0191 2001 10.4271/2001-01-0191
- Rose, D. Boger, T. “Different Approaches to Soot Estimation as Key Requirement for DPF Applications,” SAE Technical Paper 2009-01-1262 2009 10.4271/2009-01-1262
- Konstandopoulos, A.G. Skaperdas, E. Masoudi, M. “Microstructural Properties of Soot Deposits in Diesel Particulate Traps,” SAE Technical Paper 2002-01-1015 2002 10.4271/2002-01-1015
- Ohori, S. Yamamoto, K. Yamashita, H. Daidou, S. “Numerical Simulation on Flow with Soot Deposition in Diesel Particulate Filter,” Transactions of the Japan Society of Mechanical Engineers 75 750 176 183 2009