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Midinfrared polarization spectroscopy of OH and hot water in low pressure lean premixed flames

Li, Zhongshan LU ; Hu, Changhong; Zetterberg, Johan LU ; Linvin, Martin LU and Aldén, Marcus LU (2007) In Journal of Chemical Physics 127(8).
Abstract
The application of midinfrared polarization spectroscopy (mid-IRPS) is demonstrated for sensitive detection of minor molecular species in combustion environments by probing rovibrational transitions. High resolution mid-IRPS spectra of low pressure flames were obtained in the spectral range around 3 mu m. Rotational lines of the fundamental vibrational band of the hydroxyl radical (OH) were fully resolved and properly assigned among the abundant hot water lines in the flame mid-IRPS spectra. The high signal-to-noise ratio of the recorded OH lines indicates the feasibility of sensitive mid-IRPS OH detection. This constitutes, to the best of our knowledge, the first reported OH flame detection in the midinfrared spectral range. A simulation... (More)
The application of midinfrared polarization spectroscopy (mid-IRPS) is demonstrated for sensitive detection of minor molecular species in combustion environments by probing rovibrational transitions. High resolution mid-IRPS spectra of low pressure flames were obtained in the spectral range around 3 mu m. Rotational lines of the fundamental vibrational band of the hydroxyl radical (OH) were fully resolved and properly assigned among the abundant hot water lines in the flame mid-IRPS spectra. The high signal-to-noise ratio of the recorded OH lines indicates the feasibility of sensitive mid-IRPS OH detection. This constitutes, to the best of our knowledge, the first reported OH flame detection in the midinfrared spectral range. A simulation of hot water mid-IRPS lines with molecular parameters extracted from the HITRAN/HITEMP database was performed and compared with the observed flame spectra. The proper prediction of the hot water lines may help to clarify the potential spectral interferences associated with minor species measurements. (c) 2007 American Institute of Physics. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
127
issue
8
publisher
American Institute of Physics
external identifiers
  • wos:000249156300031
  • scopus:34548458612
ISSN
0021-9606
DOI
10.1063/1.2759216
language
English
LU publication?
yes
id
9b135560-1fe9-4049-bb11-0292b104228c (old id 687959)
date added to LUP
2007-12-14 14:33:53
date last changed
2017-11-19 03:27:23
@article{9b135560-1fe9-4049-bb11-0292b104228c,
  abstract     = {The application of midinfrared polarization spectroscopy (mid-IRPS) is demonstrated for sensitive detection of minor molecular species in combustion environments by probing rovibrational transitions. High resolution mid-IRPS spectra of low pressure flames were obtained in the spectral range around 3 mu m. Rotational lines of the fundamental vibrational band of the hydroxyl radical (OH) were fully resolved and properly assigned among the abundant hot water lines in the flame mid-IRPS spectra. The high signal-to-noise ratio of the recorded OH lines indicates the feasibility of sensitive mid-IRPS OH detection. This constitutes, to the best of our knowledge, the first reported OH flame detection in the midinfrared spectral range. A simulation of hot water mid-IRPS lines with molecular parameters extracted from the HITRAN/HITEMP database was performed and compared with the observed flame spectra. The proper prediction of the hot water lines may help to clarify the potential spectral interferences associated with minor species measurements. (c) 2007 American Institute of Physics.},
  author       = {Li, Zhongshan and Hu, Changhong and Zetterberg, Johan and Linvin, Martin and Aldén, Marcus},
  issn         = {0021-9606},
  language     = {eng},
  number       = {8},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {Midinfrared polarization spectroscopy of OH and hot water in low pressure lean premixed flames},
  url          = {http://dx.doi.org/10.1063/1.2759216},
  volume       = {127},
  year         = {2007},
}