Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Effect of NH3 Uniformity Index on SCR System According to Urea Spray Characteristics

요소수 분무특성이 SCR시스템 내 분무균일도에 미치는 영향

  • 김세훈 (현대케피코 기술연구소) ;
  • 고진석 (현대케피코 기술연구소) ;
  • 고재유 (현대케피코 기술연구소) ;
  • 조영준 (현대케피코 기술연구소) ;
  • 이동률 (현대케피코 기술연구소)
  • Received : 2019.10.11
  • Accepted : 2019.12.02
  • Published : 2019.12.30
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Abstract

Diesel engines have the advantages of higher thermal efficiency and lower CO2 emissions than gasoline engines, but have the disadvantages that particulate matter (PM) and nitrogen oxides (NOx) emissions are greater than those of gasoline engines. In particular, nitrogen oxides (NOx) emitted from diesel engines generates secondary ultrafine dust (PM2.5) through photochemical reactions in the atmosphere, which is fatal to humans. In order to reduce nitrogen oxides (NOx), pre-treatment systems such as EGR, post-treatment systems such as LNT and Urea SCR have been actively studied. The Urea SCR consists of an injection device injecting urea agent and a catalytic device for reducing nitrogen oxides (NOx). The nitrogen oxide (NOx) reduction performance varies greatly depending on the urea uniformity in the exhaust pipe. In this study, spray characteristics according to the spray hole structure were confirmed, and the influence of spray uniformity on spray characteristics was studied through engine evaluation.

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References

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