Effect of NO on Catalytic Soot Oxidation in Tight Contact with $Pt/CeO_2$ Using a Flow Reactor System

$Pt/CeO_2$ 촉매와 Tight Contact 한 상태의 Model Soot 산화에 NO가 미치는 영향에 관한 실험적 연구

  • Received : 2010.04.28
  • Accepted : 2010.12.30
  • Published : 2011.05.01

Abstract

Active regeneration in CDPF requires $O_2$ which regenerates soot at high temperature. However, small amount of NO can interrupt $O_2$ regeneration in CDPF. To verify this phenomena, soot oxidation experiments using a flow reactor with a $Pr/CeO_2$ catalyst are carried out to simulate Catalyzed Diesel Particulate Filter (CDPF) phenomena. Catalytic soot oxidation with and without small amount of NO is conducted under tight contact condition. As the heating rate rises, the temperature gap of maximum reaction rate is increased between with and without 50ppm NO. To accelerate the $NO_2$ de-coupling effect, CTO process is performed to eliminate interfacial contact for that time. As CTO process is extended, temperature which indicates peak reaction rate increases. From this result, it is found that small amount of NO can affect tight contact soot oxidation by removal of interfacial contact between soot and catalyst.

Keywords

Acknowledgement

Grant : 미래형 자동차 배기가스 제로화 기술개발

Supported by : 산업자원부

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