The Emission Characteristics of Bio-Diesel Fuel in Heavy-Duty Engine

바이오 디젤 적용에 따른 대형엔진의 배출가스 특성

  • 김선문 (국립환경과학원 교통환경연구소) ;
  • 엄명도 (국립환경과학원 교통환경연구소) ;
  • 홍지형 (국립환경과학원 교통환경연구소)
  • Received : 2010.04.12
  • Accepted : 2010.08.27
  • Published : 2010.10.31


Recently, a great deal of attention have been directed to the use of alternative fuels as a means to reduce vehicular emissions. As one of the promising alternative fuels, bio-diesel has advantages of a wide adaptability without retrofit of diesel engine. It is also effective enough to reduce CO, THC, $SO_x$, polycyclic aromatic hydrocarbons (PAHs) and PM. In this study, we investigated the emission characteristics of biofuels between different operating conditions, i.e., engine speed (1,400 rpm and 2,300 rpm), engine load (10% and 100%), bio-diesel blending (BD0, BD5 and BD20), and recirculation (EGR) rate of exhaust gas (0% and 20%). Relative performance of the system was evaluated mainly for the greenhouse gases ($CH_4$, $N_2O$ and $CO_2$). In addition, emission characteristics of ND-13 mode were also tested against both greenhouse gases and other airborne pollutants under emission regulation. The relative composition of bio-diesel has shown fairly clear effects on the emission quantities of CO, THC, and PM emission, although it was not on $NO_x$ and greenhouse gases. EGR rate has shown trade-off characteristics between $NO_x$ and PM.


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