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Quantitative HCN measurements in CH4/N2O/O-2/N-2 flames using mid-infrared polarization spectroscopy

Sun, Zhiwei LU ; Li, Zhongshan LU ; Konnov, Alexander LU and Aldén, Marcus LU (2011) In Combustion and Flame 158(10). p.1898-1904
Abstract
Quantitative measurements of hydrogen cyanide (HCN) were nonintrusively performed using mid-infrared polarization spectroscopy (IRPS) in atmospheric pressure flames. The lifted flat, laminar, premixed CH4/N2O/O-2/N-2 flames were stabilized on a 7 cm diameter home-built McKenna-type burner with variable proportion of N2O and O-2. The characteristic spectral structure of HCN molecules was identified in the rotational line-resolved IRPS spectra collected in flames at around 3248 cm(-1). The P20 line belonging to the C-H stretching band was chosen for quantitative measurements and the line-integrated IRPS signal was recorded in a series of fuel-rich CH4/O-2/N2O/N-2 flames with equivalence ratios of 1.2, 1.4 and 1.6. Absolute mole fractions of... (More)
Quantitative measurements of hydrogen cyanide (HCN) were nonintrusively performed using mid-infrared polarization spectroscopy (IRPS) in atmospheric pressure flames. The lifted flat, laminar, premixed CH4/N2O/O-2/N-2 flames were stabilized on a 7 cm diameter home-built McKenna-type burner with variable proportion of N2O and O-2. The characteristic spectral structure of HCN molecules was identified in the rotational line-resolved IRPS spectra collected in flames at around 3248 cm(-1). The P20 line belonging to the C-H stretching band was chosen for quantitative measurements and the line-integrated IRPS signal was recorded in a series of fuel-rich CH4/O-2/N2O/N-2 flames with equivalence ratios of 1.2, 1.4 and 1.6. Absolute mole fractions of HCN molecules in these flames were obtained through in situ calibration of the optical system with nonreactive gas flow of N-2 seeded with known amount of HCN on the same burner. Moreover, the experimental results were compared with calculations performed using the Konnov detailed C/H/N/O mechanism, which implements NCN prompt-NO reactions. Generally good agreement was found with some discrepancies indicating the need for further model improvement. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
HCN, Mid-infrared polarization spectroscopy, Methane flames
in
Combustion and Flame
volume
158
issue
10
pages
1898 - 1904
publisher
Elsevier
external identifiers
  • wos:000294525200005
  • scopus:80052374917
ISSN
0010-2180
DOI
10.1016/j.combustflame.2011.03.008
language
English
LU publication?
yes
id
11067d00-9568-4dca-af74-a4da7c89db0e (old id 2160580)
date added to LUP
2011-09-22 07:41:28
date last changed
2017-05-28 04:12:27
@article{11067d00-9568-4dca-af74-a4da7c89db0e,
  abstract     = {Quantitative measurements of hydrogen cyanide (HCN) were nonintrusively performed using mid-infrared polarization spectroscopy (IRPS) in atmospheric pressure flames. The lifted flat, laminar, premixed CH4/N2O/O-2/N-2 flames were stabilized on a 7 cm diameter home-built McKenna-type burner with variable proportion of N2O and O-2. The characteristic spectral structure of HCN molecules was identified in the rotational line-resolved IRPS spectra collected in flames at around 3248 cm(-1). The P20 line belonging to the C-H stretching band was chosen for quantitative measurements and the line-integrated IRPS signal was recorded in a series of fuel-rich CH4/O-2/N2O/N-2 flames with equivalence ratios of 1.2, 1.4 and 1.6. Absolute mole fractions of HCN molecules in these flames were obtained through in situ calibration of the optical system with nonreactive gas flow of N-2 seeded with known amount of HCN on the same burner. Moreover, the experimental results were compared with calculations performed using the Konnov detailed C/H/N/O mechanism, which implements NCN prompt-NO reactions. Generally good agreement was found with some discrepancies indicating the need for further model improvement. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved.},
  author       = {Sun, Zhiwei and Li, Zhongshan and Konnov, Alexander and Aldén, Marcus},
  issn         = {0010-2180},
  keyword      = {HCN,Mid-infrared polarization spectroscopy,Methane flames},
  language     = {eng},
  number       = {10},
  pages        = {1898--1904},
  publisher    = {Elsevier},
  series       = {Combustion and Flame},
  title        = {Quantitative HCN measurements in CH4/N2O/O-2/N-2 flames using mid-infrared polarization spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.combustflame.2011.03.008},
  volume       = {158},
  year         = {2011},
}