Soot reduction by NO2 addition in a laminar premixed flame

A. Menon, M. Linevsky, M. McKeand, Suresh Sankaranarayana Iyer, S. Y. Lee, Thomas Litzinger, R. J. Santoro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Soot formation was measured in a laminar premixed ethylene-air flame at the equivalence ratios of 2.34 and 2.64 using optical techniques to measure the soot concentration and temperature profile. The results showed soot concentrations were significantly reduced with 5% NO2 addition to the flow. Detailed temperature measurements using a potassium line reversal technique indicated that peak temperature and location remained the same for both baseline and the flame with 5% NO2 added. Fluorescence measurements also showed that PAH signals, which are often argued to be an indicator of soot precursors, were weaker near the burner surface for the flame with NO2 added than for the baseline flame. Thus, it appears that the soot formation process is directly affected by the addition of NO2 by altering the chemical pathways leading to particle inception. Further analysis is proceeding using a chemical kinetic code to verify the proposed soot reduction mechanism and to give more insight into the initial soot formation process.

Original languageEnglish (US)
Title of host publicationChemical and Physical Processes of Combustion - 2005 Technical Meeting of the Eastern States Section of the Combustion Institute
PublisherCombustion Institute
Pages113-116
Number of pages4
ISBN (Electronic)9781604235067
StatePublished - Jan 1 2005
Event2005 Technical Meeting of the Eastern States Section of the Combustion Institute: Chemical and Physical Processes of Combustion - Orlando, United States
Duration: Nov 13 2005Nov 15 2005

Other

Other2005 Technical Meeting of the Eastern States Section of the Combustion Institute: Chemical and Physical Processes of Combustion
CountryUnited States
CityOrlando
Period11/13/0511/15/05

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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  • Cite this

    Menon, A., Linevsky, M., McKeand, M., Iyer, S. S., Lee, S. Y., Litzinger, T., & Santoro, R. J. (2005). Soot reduction by NO2 addition in a laminar premixed flame. In Chemical and Physical Processes of Combustion - 2005 Technical Meeting of the Eastern States Section of the Combustion Institute (pp. 113-116). Combustion Institute.