한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제20권6호
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  • Pages.73-82
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  • 2012
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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바나듐계 촉매상에서 암모니아를 이용한 질소산화물의 환원반응속도에 수분이 미치는 영향에 관한 연구

Effect of Water on the Kinetics of Nitric Oxides Reduction by Ammonia over V-based Catalyst

  • 김영득 (한양대학교 BK21 혁신설계기계인력양성사업단) ;
  • 정수진 (자동차부품연구원 그린동력시스템연구센터) ;
  • 김우승 (한양대학교 기계공학과)
  • Kim, Young-Deuk (Innovative Design Education Program for Mechanical Engineers, BK21 Project, Hanyang University) ;
  • Jeong, Soo-Jin (Green Powertrain System R&D Center, Korea Automotive Technology Institute) ;
  • Kim, Woo-Seung (Department of Mechanical Engineering, Hanyang University)
  • 투고 : 2011.11.08
  • 심사 : 2012.03.27
  • 발행 : 2012.11.01
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초록

The main and side reactions of the three selective catalytic reduction (SCR) reactions with ammonia over a vanadium-based catalyst have been investigated using synthetic gas mixtures in the temperature range of $170{\sim}590^{\circ}C$. The three SCR reactions are standard SCR with pure NO, fast SCR with an equimolar mixture of NO and $NO_2$, and $NO_2$ SCR with pure $NO_2$. Vanadium based catalyst has no significant activity in NO oxidation to $NO_2$, while it has high activity for $NO_2$ decomposition at high temperatures. The selective catalytic oxidation of ammonia and the formation of nitrous oxide compete with the SCR reactions at the high temperatures. Water strongly inhibits the selective catalytic oxidation of ammonia and the formation of nitrous oxide, thus increasing the selectivity of the SCR reactions. However, the presence of water inhibits the SCR activity, most pronounced at low temperatures. In this study, the experimental results are analyzed by means of a dynamic one-dimensional isothermal heterogeneous plug-flow reactor (PFR) model according to the Eley-Rideal mechanism.

키워드

참고문헌

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피인용 문헌

  1. Combustion Characteristics and Exhaust Emissions in Spark-ignition Engine Using Gasoline-ammonia vol.21, pp.6, 2013, https://doi.org/10.7467/KSAE.2013.21.6.155