Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Impact of Ash Deposit on Conversion Efficiency of Wall Flow Type Monolithic SCR Reactor

벽유동 방식 담체를 사용하는 SCR 촉매 반응기에서 재 퇴적이 변환 효율에 미치는 영향에 대한 연구

  • Park, Soo-Youl (Department of Mechanical Engineering, Massachusetts Institute of Technology)
  • 박수열 (메사추세츠 공과대학교 기계공학과)
  • Received : 2012.10.30
  • Accepted : 2012.12.04
  • Published : 2013.02.28
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Abstract

SCR (Selective Catalytic Reduction) on DPF (Diesel Particulate Filter) is a multi-functional after-treatment device which integrates soot filtration and DeNOx function into a single can. Because of its advantage in package and cost, the SCR on DPF is considered as a potential candidate for future application. It inherently employes wall flow type monolithic reactor so ash included in exhaust gas may deposit inside the inlet channel of this device. This study is intended to identify the impact of ash deposit on SCR reaction under wall flow type monolithic reactor. Simulation approach is used so relevant species transport equations for wall flow type monolith is derived. These equations can be solved together with momentum conservation equations and give solution for conversion performance. Both ash deposit and clean catalyst case are simulated and comparison of these two cases gives an insight for the impact of ash deposit on conversion performance. Ash deposit can be classified as ash layer and ash plug. and impact of ash deposit is described along with different morphology of ash deposit.

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References

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