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The effects of filter porosity and flow conditions on soot deposition/oxidation and pressure drop in particulate filters

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  • Choi, Seungmok
  • Oh, Kwang-Chul
  • Lee, Chun-Bum

Abstract

Particulate filters are widely used in the automotive industry to reduce PM (particulate matter) produced by internal combustion engines. Wall-flow particulate filters trap PM while exhaust gas passes through the porous walls of the filter, with the pore microstructure of the porous walls affecting soot deposition, oxidation, and pressure drops during filtration and regeneration. In this study, soot deposition/oxidation behaviors were visualized in relation to the pressure drop, and the pressure drop characteristics of two particulate filters having different porosity were compared based on the results of the visualizations. It was found that the oxidation rate of the soot cake on channel walls is slower than that of the soot in the pores, due to limited oxidizer diffusion into the soot cake, which causes three-stage regeneration under the controlled regeneration regime. The high-porosity filter offered a lower pressure drop at the same amount of soot loading, faster pressure drop recovery, and higher regeneration efficiency during controlled regeneration.

Suggested Citation

  • Choi, Seungmok & Oh, Kwang-Chul & Lee, Chun-Bum, 2014. "The effects of filter porosity and flow conditions on soot deposition/oxidation and pressure drop in particulate filters," Energy, Elsevier, vol. 77(C), pages 327-337.
    • Handle: RePEc:eee:energy:v:77:y:2014:i:c:p:327-337
    DOI: 10.1016/j.energy.2014.08.049
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    1. Tsuneyoshi, Koji & Yamamoto, Kazuhiro, 2013. "Experimental study of hexagonal and square diesel particulate filters under controlled and uncontrolled catalyzed regeneration," Energy, Elsevier, vol. 60(C), pages 325-332.
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    5. Macián, V. & Serrano, J.R. & Piqueras, P. & Sanchis, E.J., 2019. "Internal pore diffusion and adsorption impact on the soot oxidation in wall-flow particulate filters," Energy, Elsevier, vol. 179(C), pages 407-421.
    6. Eugenio Meloni & Bruno Rossomando & Gianluigi De Falco & Mariano Sirignano & Ivan Arsie & Vincenzo Palma, 2023. "Effect of a Cu-Ferrite Catalyzed DPF on the Ultrafine Particle Emissions from a Light-Duty Diesel Engine," Energies, MDPI, vol. 16(10), pages 1-19, May.
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