Effect of mixing methane, ethane, propane and propene on the synergistic effect of PAH and soot formation in ethylene-base counterflow diffusion flames

S. S. Yoon, S. M. Lee, Suk Ho Chung

Research output: Contribution to conferencePaperpeer-review

Abstract

To elucidate the effect of fuel mixing on the formations of PAH and soot, four different types of fuels (methane, ethane, propane, and propene) were mixed to counterflow ethylene-base diffusion names. Planar laser-induced incandescence and laser-induced fluorescence techniques were employed to measure relative soot volume fractions and PAH concentrations, respectively. Small amount of ethane mixing in ethylene diffusion flame also exhibited the synergistic effect on PAH and soot formations. The mixing of propane in ethylene diffusion flame had more pronounced synergistic effect as compared to the propylene mixing when the mixture ratio was small. Since the decomposition reactions of ethane or propane could be the source of methyl radicals, such behaviors emphasize the role of methyl radicals on the formation of PAH and soot. Propargyl formation could be additionally enhanced by the reactions related to methyl radical, which can be the reason for the synergistic effect in the mixture flames of ethylene with propane or ethane. Numerical results on the concentrations of CH3, C2H2, and C3H3 substantiated the importance of methyl radical on the formation of propargyl and thereby the synergistic effect in the formation of PAH and subsequent soot growth.

Original languageEnglish (US)
Number of pages1
StatePublished - Jan 1 2004
Event30th International Symposium on Combustion, Abstracts of Symposium Papers - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

Other

Other30th International Symposium on Combustion, Abstracts of Symposium Papers
CountryUnited States
CityChicago, IL
Period07/25/0407/30/04

ASJC Scopus subject areas

  • Engineering(all)

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