Methodology for detection of carbon monoxide in hot, humid media by telecommunication distributed feedback laser-based tunable diode laser absorption spectrometry |
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Authors: | Lathdavong Lemthong Shao Jie Kluczynski Pawel Lundqvist Stefan Axner Ove |
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Affiliation: | Department of Physics, Ume? University, SE-901 87 Ume?, Sweden. |
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Abstract: | Detection of carbon monoxide (CO) in combustion gases by tunable diode laser spectrometry is often hampered by spectral interferences from H2O and CO2. A methodology for assessment of CO in hot, humid media using telecommunication distributed feedback lasers is presented. By addressing the R14 line at 6395.4 cm(-1), and by using a dual-species-fitting technique that incorporates the fitting of both a previously measured water background reference spectrum and a 2f-wavelength modulation lineshape function, percent-level concentrations of CO can be detected in media with tens of percent of water (c(H2O)≤40%) at T≤1000?°C with an accuracy of a few percent by the use of a single reference water spectrum for background correction. |
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