An experimental study on the formation of polycyclic aromatic hydrocarbons in laminar coflow non-premixed methane/air flames doped with four isomeric butanols

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DOIResolve DOI: http://doi.org/10.1016/j.proci.2012.05.107
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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
Pages779786; # of pages: 8
SubjectLaminar non-premixed coflow flame; Butanol; Synchrotron VUV; photoionization mass spectrometry; Benzene and PAH formation
AbstractExperimental measurements were conducted for temperatures and mole fractions of C1–C16 combustion intermediates in laminar coflow non-premixed methane/air flames doped with 3.9% (in volume) 1-butanol, 2-butanol, iso-butanol and tert-butanol, respectively. Synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS) technique was utilized in the measurements of species mole fractions. The results show that the variant molecular structures of butyl alcohols have led to different efficiencies in the formation of polycyclic aromatic hydrocarbons (PAHs) that may cause the variations in sooting tendency. Detailed species information suggests that the presence of allene and propyne promotes benzene formation through the C3H3 + C3H4 reactions and consequently PAH formation through the additions of C2 and C3 species to benzyl or phenyl radicals. As a matter of fact, PAHs formed from the 1-butanol doped flame are the lowest among the four investigated flames, because 1-butanol mainly decomposes to ethylene and oxygenates rather than C3 hydrocarbon species. Meanwhile, the tert-butanol doped flame generates the largest quantities of allene and propyne among the four flames and therefore is the sootiest one.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedNo
IdentifierS1540748912001101
NRC number53074
NPARC number21268444
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Record identifier612c13fc-2e81-410a-91ff-c9b1fc594c7c
Record created2013-07-18
Record modified2016-05-09
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