SCR 촉매와 AOC 촉매에서 환원제 분사에 따른 $NO_x$ 저감효율과 $NH_3$ 변환효율에 관한 실험적 연구

An Experimental Study on $NO_x$ Reduction Efficiency and $NH_3$ Conversion Efficiency under Various Conditions of Reductant Injection on SCR and AOC

  • 동윤희 (국민대학교 자동차전문대학원) ;
  • 최정황 (국민대학교 자동차전문대학원) ;
  • 조용석 (국민대학교 기계.자동차공학부) ;
  • 이성욱 (국민대학교 기계.자동차공학부) ;
  • 이승호 (경기공업대학 자동차과) ;
  • 오상기 (경기공업대학 자동차과) ;
  • 박현대 (일진전기)
  • Dong, Yoon-Hee (Graduated School of Automotive Engineering, Kookmin University) ;
  • Choi, Jung-Hwang (Graduated School of Automotive Engineering, Kookmin University) ;
  • Cho, Yong-Seok (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Lee, Seang-Wock (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Lee, Seong-Ho (Department of Automotive Engineering, Kyonggi Institute of Technology College) ;
  • Oh, Sang-Ki (Department of Automotive Engineering, Kyonggi Institute of Technology College) ;
  • Park, Hyun-Dae (Iljin Electric Co.)
  • 투고 : 2009.12.09
  • 심사 : 2010.02.02
  • 발행 : 2010.09.01

초록

As the environmental regulation of vehicle emission is strengthened, investigations for $NO_x$ and PM reduction strategies are popularly conducted. Two current available technologies for continuous $NO_x$ reduction onboard diesel vehicles are Selective Catalytic Reduction (SCR) using aqueous urea and lean $NO_x$ trap (LNT) catalysts. The experiments were conducted to investigate the $NO_x$ reduction performance of SCR system which can control the ratio of $NO/NO_2$, temperature and SV(space velocity), and the model gas was used which is similar to a diesel exhaust gas. The maximum reduction efficiency is indicated when the $NO:NO_2$ ratio is 1:1 and the SV is 30,000 $h^{-1}$ in $300^{\circ}C$. Generally, ammonia slip from SCR reactors are rooted to incomplete conversion of $NH_3$ over the SCR. In this research, slip was occurred in 6cases (except low SV and $NO:NO_2$ ratio is 1:1) after SCR. Among 6 case of slip occurrence, the maximum conversion efficiency is observed when SV is 60,000 $h^{-1}$ in $400^{\circ}C$.

키워드

참고문헌

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