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An experimental and kinetic modeling study on nitric oxide formation in premixed C3 alcohols flames

Capriolo, G. LU ; Brackmann, C. LU ; Lubrano Lavadera, M. LU ; Methling, T. LU and Konnov, A. A. LU (2020) In Proceedings of the Combustion Institute
Abstract

This study provides new quantitative NO concentrations measurements in n-propanol + air and i-propanol + air flames together with a new combustion kinetic model. The heat flux method was employed to stabilize propyl alcohols flames and the initial gas conditions were set to 323 K, 1 atm, and ϕ=0.7-1.4. Saturated laser-induced fluorescence was employed to measure NO concentration in the post-combustion region. The presented and literature models, namely the POLIMI and Bohon et al. (2018) kinetic mechanisms, were assessed against new experimental data. Experimental results showed a higher NO formation in the thermal zone for n-propanol flames, whereas i-propanol flames indicate a higher amount of NO formed at fuel-rich conditions. Overall... (More)

This study provides new quantitative NO concentrations measurements in n-propanol + air and i-propanol + air flames together with a new combustion kinetic model. The heat flux method was employed to stabilize propyl alcohols flames and the initial gas conditions were set to 323 K, 1 atm, and ϕ=0.7-1.4. Saturated laser-induced fluorescence was employed to measure NO concentration in the post-combustion region. The presented and literature models, namely the POLIMI and Bohon et al. (2018) kinetic mechanisms, were assessed against new experimental data. Experimental results showed a higher NO formation in the thermal zone for n-propanol flames, whereas i-propanol flames indicate a higher amount of NO formed at fuel-rich conditions. Overall among the tested models, the present mechanism exhibited the best agreement in emulating NO experimental profiles; conversely, numerical simulations from the POLIMI model showed significant inconsistencies at fuel-rich conditions and the Bohon et al. (2018) model was unable to reproduce the measured data, notably underpredicting experimental values at all investigated conditions. However, the present model manifested some uncertainties in reproducing NO formation in the prompt region; therefore, in connection with this important aspect, the new experimental data obtained in this work will provide a valid support to further develop more reliable kinetic models.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
I-Propanol, LIF, Modeling, N-Propanol, NO
in
Proceedings of the Combustion Institute
publisher
Elsevier
external identifiers
  • scopus:85091457594
ISSN
1540-7489
DOI
10.1016/j.proci.2020.07.051
language
English
LU publication?
yes
id
f750fca4-d04d-4277-9c2a-df986f214947
date added to LUP
2020-10-28 08:00:00
date last changed
2021-01-10 04:14:13
@article{f750fca4-d04d-4277-9c2a-df986f214947,
  abstract     = {<p>This study provides new quantitative NO concentrations measurements in n-propanol + air and i-propanol + air flames together with a new combustion kinetic model. The heat flux method was employed to stabilize propyl alcohols flames and the initial gas conditions were set to 323 K, 1 atm, and ϕ=0.7-1.4. Saturated laser-induced fluorescence was employed to measure NO concentration in the post-combustion region. The presented and literature models, namely the POLIMI and Bohon et al. (2018) kinetic mechanisms, were assessed against new experimental data. Experimental results showed a higher NO formation in the thermal zone for n-propanol flames, whereas i-propanol flames indicate a higher amount of NO formed at fuel-rich conditions. Overall among the tested models, the present mechanism exhibited the best agreement in emulating NO experimental profiles; conversely, numerical simulations from the POLIMI model showed significant inconsistencies at fuel-rich conditions and the Bohon et al. (2018) model was unable to reproduce the measured data, notably underpredicting experimental values at all investigated conditions. However, the present model manifested some uncertainties in reproducing NO formation in the prompt region; therefore, in connection with this important aspect, the new experimental data obtained in this work will provide a valid support to further develop more reliable kinetic models.</p>},
  author       = {Capriolo, G. and Brackmann, C. and Lubrano Lavadera, M. and Methling, T. and Konnov, A. A.},
  issn         = {1540-7489},
  language     = {eng},
  month        = {09},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {An experimental and kinetic modeling study on nitric oxide formation in premixed C<sub>3</sub> alcohols flames},
  url          = {http://dx.doi.org/10.1016/j.proci.2020.07.051},
  doi          = {10.1016/j.proci.2020.07.051},
  year         = {2020},
}