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Pure rotational coherent anti-Stokes Raman spectroscopy in mixtures of CO and N-2

Afzelius, Mikael LU ; Brackmann, Christian LU ; Vestin, Fredrik LU and Bengtsson, Per-Erik LU (2004) In Applied Optics 43(36). p.6664-6672
Abstract
We present a model for quantitative measurements in binary mixtures of nitrogen and carbon monoxide by the use of dual-broadband rotational coherent anti-Stokes Raman spectroscopy. The model has been compared with experimental rotational coherent anti-Stokes Raman scattering spectra recorded within the temperature range of 294-702 K. Temperatures and concentrations were evaluated by spectral fits using libraries of theoretically calculated spectra. The relative error of the temperature measurements was 1-2%, and the absolute error of the CO concentration measurements was <0.5% for temperatures less than or equal to600 K. For higher temperatures, the gas composition was not chemically stable, and we observed a conversion of CO to CO2.... (More)
We present a model for quantitative measurements in binary mixtures of nitrogen and carbon monoxide by the use of dual-broadband rotational coherent anti-Stokes Raman spectroscopy. The model has been compared with experimental rotational coherent anti-Stokes Raman scattering spectra recorded within the temperature range of 294-702 K. Temperatures and concentrations were evaluated by spectral fits using libraries of theoretically calculated spectra. The relative error of the temperature measurements was 1-2%, and the absolute error of the CO concentration measurements was <0.5% for temperatures less than or equal to600 K. For higher temperatures, the gas composition was not chemically stable, and we observed a conversion of CO to CO2. The influence of important spectroscopic parameters such as the anisotropic polarizability and Raman line-broadening coefficients are discussed in terms of concentration measurements. In particular, it is shown that the CO concentration measurement was more accurate if N-2-CO and CO-N-2 line-broadening coefficients were included in the calculation. The applicability of the model for quantitative flame measurements is demonstrated by measuring CO concentrations in ethylene/air flames. (C) 2004 Optical Society of America. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Applied Optics
volume
43
issue
36
pages
6664 - 6672
publisher
OSA
external identifiers
  • pmid:15646786
  • wos:000225916500014
ISSN
2155-3165
language
English
LU publication?
yes
id
5edab525-42a5-40df-b516-f891be8d5b72 (old id 259052)
date added to LUP
2007-08-28 15:21:39
date last changed
2016-04-15 20:04:46
@article{5edab525-42a5-40df-b516-f891be8d5b72,
  abstract     = {We present a model for quantitative measurements in binary mixtures of nitrogen and carbon monoxide by the use of dual-broadband rotational coherent anti-Stokes Raman spectroscopy. The model has been compared with experimental rotational coherent anti-Stokes Raman scattering spectra recorded within the temperature range of 294-702 K. Temperatures and concentrations were evaluated by spectral fits using libraries of theoretically calculated spectra. The relative error of the temperature measurements was 1-2%, and the absolute error of the CO concentration measurements was &lt;0.5% for temperatures less than or equal to600 K. For higher temperatures, the gas composition was not chemically stable, and we observed a conversion of CO to CO2. The influence of important spectroscopic parameters such as the anisotropic polarizability and Raman line-broadening coefficients are discussed in terms of concentration measurements. In particular, it is shown that the CO concentration measurement was more accurate if N-2-CO and CO-N-2 line-broadening coefficients were included in the calculation. The applicability of the model for quantitative flame measurements is demonstrated by measuring CO concentrations in ethylene/air flames. (C) 2004 Optical Society of America.},
  author       = {Afzelius, Mikael and Brackmann, Christian and Vestin, Fredrik and Bengtsson, Per-Erik},
  issn         = {2155-3165},
  language     = {eng},
  number       = {36},
  pages        = {6664--6672},
  publisher    = {OSA},
  series       = {Applied Optics},
  title        = {Pure rotational coherent anti-Stokes Raman spectroscopy in mixtures of CO and N-2},
  volume       = {43},
  year         = {2004},
}