Plasma/catalyst system for reduction of NOx in diesel engine exhaust

Bae Hyeock Chun, Hyeong Sang Lee, Chang Soo Nam, Kwang Min Chun, Jae Hong Ryu, Kwan Young Lee

Research output: Contribution to conferencePaperpeer-review

3 Citations (Scopus)


NOx reduction by a plasma/catalyst system was tested with modeled gas and real exhaust gas. Ag/Al2O3 was used as the catalyst. The oxidation of NO to NO2 by the plasma was increased as HC concentration and input energy density increase. The presence of H2O in the reactant gas led to the production of acid by plasma. The catalytic activity for NOx reduction was enhanced by the assistance of plasma especially in the lower temperature region. This activity was a little suppressed in the presence of H2O, but the acid was not detected in the effluent gas treated by the plasma/catalyst system. The NOx conversion to N2 was evaluated by a gas chromatography in the model gas with helium as the balance gas. The result in helium balance gas showed the selectivity to N2 depended on the catalyst temperature and was also enhanced by the assistance of plasma. The 50% of NOx removal from the diesel exhaust gas was achieved by the plasma /catalyst system.

Original languageEnglish
Publication statusPublished - 2000 Dec 1
EventInternational Fall Fuels and Lubricants Meeting and Exposition - Baltimore, MD, United States
Duration: 2000 Oct 162000 Oct 19


OtherInternational Fall Fuels and Lubricants Meeting and Exposition
Country/TerritoryUnited States
CityBaltimore, MD

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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