Soot formation in a laminar ethylene/air diffusion flame at pressures from 1 to 8atm

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DOIResolve DOI: http://doi.org/10.1016/j.proci.2012.07.006
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TypeArticle
Proceedings titleProceedings of the Combustion Institute
Conference34th International Symposium on Combustion, July 29-August 3 2012, Warsaw, Poland
ISSN1540-7489
Volume34
Issue1
Pages17951802; # of pages: 8
SubjectSoot; PAH; Laminar diffusion flame; High pressure
AbstractThe effect of pressure on soot formation in a laminar ethylene/air coflow diffusion flame was investigated by experiments and numerical simulation at pressures from 1 to 8 atm. Soot volume fraction was measured by the diffuse-light two-dimensional line-of-sight attenuation optical diagnostic method and calculated by moments model and a relatively detailed gas phase chemistry. The numerical model successfully captured the variation of soot volume fraction with increasing pressure. The detailed analysis of numerical simulation results suggests that although the rates of all soot formation sub-processes increase with increasing pressure, the rates of increase of these sub-processes differ, with that of PAH condensation being the fastest, followed by those of inception and acetylene addition, respectively. At atmosphere pressure, acetylene addition contributes most to soot formation in terms of the overall formed soot mass, while the contribution of PAH condensation significantly increases at high pressures. The variation in the soot formation mechanism is due to the different increase rates of the mole concentrations and formation of several key species that significantly affect soot inception, acetylene addition and PAH condensation.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
IdentifierS1540748912002970
NRC number53100
NPARC number21268445
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Record identifier271f61a1-2715-4072-92c6-9ae088bcd407
Record created2013-07-18
Record modified2016-05-09
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