한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제17권1호
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  • Pages.137-145
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  • 2009
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

디젤엔진의 $NO_X$ 저감을 위한 SCR $DeNO_X$ 촉매의 모델링 및 성능해석

Modeling and Performance Analysis of SCR $DeNO_X$ Catalyst for Reducing $NO_X$ Emissions in Diesel Engine

  • 김영득 (한양대학교 기계공학과 대학원) ;
  • 김우승 (한양대학교 기계공학과) ;
  • 이천환 (자동차부품연구원)
  • Kim, Young-Deuk (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Woo-Seung (Department of Mechanical Engineering, Hanyang University) ;
  • Lee, Chun-Hwan (Environmental Parts R&D Center, Korea Automotive Technology Institute)
  • 발행 : 2009.01.01
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초록

The steady-state kinetics of the selective catalytic reduction (SCR) of $NO_X$ with $NH_3$ has been investigated over a commercial ${V_2}{O_5}/TiO_2$ catalyst. In order to account for the influence of transport effects the kinetics are coupled with a fully transient two-phase 1D+1D monolith channel model. The Langmuir-Hinshelwood (L-H) mechanism is adopted to describe the steady-state kinetic behavior of the ${V_2}{O_5}/TiO_2$ catalyst. The reaction rate expressions are based on previously reported papers and are modified to fit the experimental data. The steady-state chemical reaction scheme used in the present mathematical model has been validated extensively with experimental data of selective $NO_X$ reduction efficiency for a wide range of inlet conditions such as space velocity, oxygen concentrations, water concentration, and $NO_2/NO$ ratio. The parametric investigations are performed to examine how the $NH_3$ slip from a SCR $DeNO_X$ catalyst and the conversion of $NO_X$ are affected by the reaction temperature, $NH_3/NO_X$ feed ratio, and space velocity for feed gas compositions with $NO_2/NO_X$ ratios of 0 and 0.5.

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참고문헌

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