Numerical study on the influence of hydrogen addition on soot formation in a laminar ethylene-air diffusion flame

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DOIResolve DOI: http://doi.org/10.1016/j.combustflame.2005.10.016
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TypeArticle
Journal titleCombustion and Flame
Volume145
Issue1-2
Pages324338; # of pages: 15
SubjectHydrogen addition; Laminar flame; Radiation; Soot
AbstractThe influence of hydrogen addition to the fuel of an atmosphere pressure coflow laminar ethylene-air diffusion flame on soot formation was studied by numerical simulation. A detailed gas-phase reaction mechanism, which includes aromatic chemistry up to four rings, and complex thermal and transport properties were used. The fully coupled elliptic governing equations were solved. The interactions between soot and gas-phase chemistry were taken into account. Radiation heat transfer from CO2, CO, H2O, and soot was calculated using the discrete-ordinates method coupled to a statistical narrow-band-correlated K-based wide-band model. The predicted results were compared with the available experimental data and analyzed. It is indicated that the addition of hydrogen to the fuel in an ethylene-air diffusion flame suppresses soot formation through the effects of dilution and chemistry. This result is in agreement with available experiments. The simulations further suggest that the chemically inhibiting effect of hydrogen addition on soot formation is due to the decrease of hydrogen atom concentration in soot surface growth regions and higher concentration of molecular hydrogen in the lower flame region.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada (NRC-CNRC)
Peer reviewedNo
NRC number51428
NPARC number11714421
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Record identifier9527f848-bb4b-4a1f-b3ea-e79485b8d451
Record created2009-08-18
Record modified2016-05-09
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