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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 11 — Apr. 10, 2005
  • pp: 2189–2201

Multipass open-path Fourier-transform infrared measurements for nonintrusive monitoring of gas turbine exhaust composition

Klaus Schäfer, Klaus Brockmann, Jörg Heland, Peter Wiesen, Carsten Jahn, and Olivier Legras  »View Author Affiliations


Applied Optics, Vol. 44, Issue 11, pp. 2189-2201 (2005)
http://dx.doi.org/10.1364/AO.44.002189


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Abstract

The detection limits for NO and NO2 in turbine exhausts by nonintrusive monitoring have to be improved. Multipass mode Fourier-transform infrared (FTIR) absorption spectrometry and use of a White mirror system were found from a sensitivity study with spectra simulations in the mid-infrared to be essential for the retrieval of NO2 abundances. A new White mirror system with a parallel infrared beam was developed and tested successfully with a commercial FTIR spectrometer in different turbine test beds. The minimum detection limits for a typical turbine plume of 50 cm in diameter are approximately 6 parts per million (ppm) for NO and 9 ppm for NO2 (as well 100 ppm for CO2 and 4 ppm for CO).

© 2005 Optical Society of America

OCIS Codes
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.1030) Spectroscopy : Absorption
(300.2140) Spectroscopy : Emission
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: June 9, 2004
Revised Manuscript: November 8, 2004
Manuscript Accepted: November 9, 2004
Published: April 10, 2005

Citation
Klaus Schäfer, Klaus Brockmann, Jörg Heland, Peter Wiesen, Carsten Jahn, and Olivier Legras, "Multipass open-path Fourier-transform infrared measurements for nonintrusive monitoring of gas turbine exhaust composition," Appl. Opt. 44, 2189-2201 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-11-2189


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