Diesel Engine Emission Reduction Study 

Dr. Kwang Min Chun
Professor
Department of  Mechanical Engineering
Yonsei University, Korea
kmchun@yonsei.ac.kr

I will talk about the new findings of Diesel engine emission reduction study at Yonsei University in Korea. Two main exhaust emissions of Diesel engines are Particulate Matters(PM) and NOx. We are interested in using hydrogen generated by a  fuel  reformer  to  reduce  both  PM  and  NOx.  Also,  we  use  H₂  for  combustion  improvement.    H₂  is  generated  using  a  fuel  reformer which oxidizes diesel fuel into H₂ and CO. H₂ can improve deNOx efficiency of HC-SCR at low temperature. 

Another  deNOx  related  research  is  about  the  EGR  cooler  fouling  which  drops  EGR  cooler  efficiency.  EGR  is  being  used  to  reduce NOx by replacing O₂  with  the  exhaust  gas  which  has  plenty  of  CO₂ and H₂O.  The  oxidation  of  PM  by  O₂  and  NO₂  is  experimentally  studied  for  a  wide  range  of  conditions.  And  we  use  H₂  to  oxidize  soot  at  low  temperature  inside  a  catalyzed  DPF.

Academic Record

1974.3-1978.2: Seoul National University, Mechanical Engineering, B.Sc.
1978.3-1980.2: Korea Advanced Institute of Science, Mechanical Engineering, M. S.
1983.9-1988.5: Massachusetts Institute of Technology, Mechanical Engineering, Ph.D.

Professional Experience

1980.3-1986.9: Full Time Instructor, Hanyang University
1984.1-1988.5  : Research Assistant, M.I.T.
: Research Associate, M.I.T.
1989.3- now: Professor at Yonsei University
2004.7-2011.7: Head of “Near Zero Emission Vehicle Research Center” 

Major Research Interests

1. Diesel Engine PM measurement, filtering and oxidation
2. Reduction of NOx using HC-SCR
3. Hydrogen generation using Diesel fuel reformer
4. EGR cooler fouling of  diesel engines

Award

Best Academic Achievement Awards of Korean Society of Automotive Engineers, Nov. 2002.
Received a presidential citation, May 2009

Activities

Vice president of Korean Society of Automotive Engineers since 2009 

Ongoing Project

Head of “Near-Zero Emission Technology for Future Vehicle Project” which is a consortium supported by Korean government
for 7 years started in 2004. It consists of 5 projects.