Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Studies on Reforming Gas Assisted Regeneration of Multi-channel Catalyzed DPF

합성가스(Reforming gas)를 이용한 멀티채널 CDPF의 재생 특성 연구

  • Choi, Kwang-Chun (Graduate School of Mechanical Engineering, Yonsei University) ;
  • Chung, Jin-Hwa (Graduate School of Mechanical Engineering, Yonsei University) ;
  • Song, Soon-Ho (Department of Mechanical Engineering, Yonsei University) ;
  • Chun, Kwang-Min (Department of Mechanical Engineering, Yonsei University)
  • 최광춘 (연세대학교 대학원 기계공학과) ;
  • 정진화 (연세대학교 대학원 기계공학과) ;
  • 송순호 (연세대학교 기계공학과) ;
  • 전광민 (연세대학교 기계공학과)
  • Received : 2010.10.01
  • Accepted : 2010.12.21
  • Published : 2011.05.01
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Abstract

Diesel particulate filter (DPF) systems are being used to reduce the particulate matter emission of diesel vehicles. The DPF should be regenerated after certain driving hours or distance to eliminate soot in the filter. The most widely used method is active regeneration with oxygen at $550{\sim}650^{\circ}C$. Syngas (synthetic gas) can be used to lower the regeneration temperature of Catalyzed DPF (CDPF). The syngas is formed by fuel reforming process of CPOx (Catalytic Partial Oxidation) at specific engine condition (1500rpm, 2bar) using 1wt.% $Rh/CeO_2-ZrO_2$ catalyst. The oxidation characteristics of PM with syngas supplied to filter were studied using partial flow system that can control temperature and flow rate independently. The filter is coated with washcoat loading of $25g/ft^3$ $Pt/Al_2O_3-CeO_2$, and multi-channel CDPF (MC-CDPF) was used. The filter regeneration experiments were performed to investigate the effect of syngas exothermic reaction on soot oxidation in the filter. For this purpose, before oxidation experiment, PM was collected about 8g/L to the filter at engine condition of 1500rpm, bmep 8bar and flow temperature of $200^{\circ}C$ Various conditions of temperature and concentration of syngas were used for the tests. Regeneration of filter started at 2% $H_2$ and CO concentration respectively and inlet temperature of $260^{\circ}C$. Filter Regeneration occurs more actively as the syngas concentration becomes higher.

Keywords

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