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Laminar burning velocity of acetic acid + air flames

Christensen, Moah LU and Konnov, Alexander A. LU (2016) In Combustion and Flame 170. p.12-29
Abstract

Laminar burning velocities of acetic acid + air flames at 1 atm and initial gas temperatures of 338 K, 348 K, and 358 K were determined using the heat flux method. Measurements were performed in non-stretched flames, stabilized on a perforated plate burner at adiabatic conditions. Due to experimental problems related to the corrosiveness of acetic acid towards the burner material, the uncertainty of the burning velocities was relatively high up to ± 2 cm/s. Seventy reactions pertinent to acetic acid and ketene have been reviewed and detailed reaction mechanism for acetic acid combustion was developed. The model over-predicts measured burning velocities by about 3 cm/s. The mechanism was also tested comparing with flame structure of the... (More)

Laminar burning velocities of acetic acid + air flames at 1 atm and initial gas temperatures of 338 K, 348 K, and 358 K were determined using the heat flux method. Measurements were performed in non-stretched flames, stabilized on a perforated plate burner at adiabatic conditions. Due to experimental problems related to the corrosiveness of acetic acid towards the burner material, the uncertainty of the burning velocities was relatively high up to ± 2 cm/s. Seventy reactions pertinent to acetic acid and ketene have been reviewed and detailed reaction mechanism for acetic acid combustion was developed. The model over-predicts measured burning velocities by about 3 cm/s. The mechanism was also tested comparing with flame structure of the low-pressure flame of acetic acid (Leplat and Vandooren, 2012). Good agreement with the concentration profiles of major products was found, however several minor intermediates were over- or under-predicted by the model. To elucidate reactions responsible for the differences observed, the sensitivity analysis was performed. It was found that the calculated burning velocities are insensitive to the reactions of acetic acid and mostly governed by C1 chemistry typical for all hydrocarbons and by reactions of ketene. Possible modifications of the rate constants within the evaluated uncertainty factors were discussed.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acetic acid, Flame, Laminar burning velocity, Modeling
in
Combustion and Flame
volume
170
pages
18 pages
publisher
Elsevier
external identifiers
  • Scopus:84971524733
ISSN
0010-2180
DOI
10.1016/j.combustflame.2016.05.007
language
English
LU publication?
yes
id
0a6f3e8e-b739-48a1-be6d-8fa7b5c6f2ff
date added to LUP
2016-06-28 12:17:48
date last changed
2016-10-13 05:10:57
@misc{0a6f3e8e-b739-48a1-be6d-8fa7b5c6f2ff,
  abstract     = {<p>Laminar burning velocities of acetic acid + air flames at 1 atm and initial gas temperatures of 338 K, 348 K, and 358 K were determined using the heat flux method. Measurements were performed in non-stretched flames, stabilized on a perforated plate burner at adiabatic conditions. Due to experimental problems related to the corrosiveness of acetic acid towards the burner material, the uncertainty of the burning velocities was relatively high up to ± 2 cm/s. Seventy reactions pertinent to acetic acid and ketene have been reviewed and detailed reaction mechanism for acetic acid combustion was developed. The model over-predicts measured burning velocities by about 3 cm/s. The mechanism was also tested comparing with flame structure of the low-pressure flame of acetic acid (Leplat and Vandooren, 2012). Good agreement with the concentration profiles of major products was found, however several minor intermediates were over- or under-predicted by the model. To elucidate reactions responsible for the differences observed, the sensitivity analysis was performed. It was found that the calculated burning velocities are insensitive to the reactions of acetic acid and mostly governed by C1 chemistry typical for all hydrocarbons and by reactions of ketene. Possible modifications of the rate constants within the evaluated uncertainty factors were discussed.</p>},
  author       = {Christensen, Moah and Konnov, Alexander A.},
  issn         = {0010-2180},
  keyword      = {Acetic acid,Flame,Laminar burning velocity,Modeling},
  language     = {eng},
  month        = {08},
  pages        = {12--29},
  publisher    = {ARRAY(0x8904c50)},
  series       = {Combustion and Flame},
  title        = {Laminar burning velocity of acetic acid + air flames},
  url          = {http://dx.doi.org/10.1016/j.combustflame.2016.05.007},
  volume       = {170},
  year         = {2016},
}