A Study on Combustion and Emission Characteristics of a Diesel Engine Fuelled with Pyrolysis Oil-Ethanol and Pilot Diesel

바이오원유-에탄올/파일럿 디젤유 이종연료 혼소를 통한 디젤엔진의 연소 및 배출가스 특성에 관한 연구

  • Kim, Min-Jae (Dept. of Mechanical Engineering, Graduate School, Gachon Univ.) ;
  • Lee, Seok-Hwan (Dept. of Engine Research, Korea Institute of Machinery and Materials, KIMM) ;
  • Cho, Jeong-Kwon (Transportation Safety Specialist, TS) ;
  • Yoon, Jun-Kyu (Dept. of Mechanical Engineering, Gachon Univ.) ;
  • Lim, Jong-Han (Dept. of Mechanical Engineering, Gachon Univ.)
  • Received : 2017.02.07
  • Accepted : 2017.05.12
  • Published : 2017.05.31


Recently, the depletion of fossil fuels, global warming and environmental pollution have emerged as a worldwide problem, and studies of new renewable energy sources have been progressed. Among the many renewable energy sources, the use of bio fuel has the potential to displace fossil fuels due to low price, easy to handle, and the abundant sources. Pyrolysis oil (PO) derived from waste wood and sawdust is considered an alternative fuel for use in diesel engines. On the other hand, PO is limited to diesel engines because of its low cetane number, high viscosity, high acidity, and low energy density. Therefore, to improve its poor properties, PO was mixed with alcohol fuels, such as ethanol. Early mixing with ethanol has the benefit of improving the storage and handling properties of the PO. Furthermore, a PO-ethanol blended fuel was injected separately, which can be fired through pilot-injected diesel in a dual-injection diesel engine. The experimental results showed that the substitution of diesel with blended fuel increases the amount of HC and CO, but reduces the NOx and PM significantly.


Combustion;Diesel Engine;Dual Fuel;Emission;Ethanol;Pilot Injection;Pyrolysis Oil


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