Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Analytical Study on Re-solidification Materials(Ammonium Carbonate Intermediates) for NOx Reduction of Exhaust Emissions in Diesel Engine with Solid SCR

디젤엔진 배출가스 질소산화물 저감을 위한 Solid SCR용 Ammonium Carbonate 중간생성물인 재응고 물질의 분석 연구

  • Shin, Jong Kook (Department of Mechanical Engineering, Graduate School, Hannam University) ;
  • Lee, Hoyeol (Department of Mechanical Engineering, Graduate School, Hannam University) ;
  • Yoon, Cheon Seog (Department of Mechanical Engineering, Hannam University) ;
  • Kim, Hongsuk (Engine Research Center, Korea Institute of Machinery & Materials)
  • 신종국 (한남대학교 대학원 기계공학과) ;
  • 이호열 (한남대학교 대학원 기계공학과) ;
  • 윤천석 (한남대학교 기계공학과) ;
  • 김홍석 (한국기계연구원 그린동력연구실)
  • Received : 2013.12.27
  • Accepted : 2014.02.04
  • Published : 2014.05.01
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Abstract

Urea solution as a reductant of SCR has been widely used to reduce NOx emissions from diesel engine. But it has lots of problems which are freezing at low temperature due to liquid state, deposition of solid formation in the exhaust, dosing device, and complex package such as mixers for uniform concentration of ammonia. In order to overcome these obstacle, ammonium carbonate which is one of solid ammonium materials to produce ammonia gas directly by sublimation process is considered. Simple reactor with visible widow was designed to predict equilibrium temperature and pressure of ammonium carbonate. To simulate real operation conditions under automobile environment, several cycles of heating and cooling condition were settled, two different re-solidification materials were extracted from the reactor and visible window. Analytical study is performed to characterize these unknown materials by XRD(X-Ray Diffraction), FT-IR(Fourier Transform Infrared Spectroscopy), and EA(Elemental Analyzer). From analytical results, re-solidification materials from heating and cooling cycles are very similar to original material of ammonium carbonate.

Keywords

References

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