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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 36 — Dec. 20, 1998
  • pp: 8382–8391

Ammonia detection and monitoring with photofragmentation fluorescence

Steven G. Buckley, Christopher J. Damm, Wolfgang M. Vitovec, Lee Anne Sgro, Robert F. Sawyer, Catherine P. Koshland, and Donald Lucas  »View Author Affiliations


Applied Optics, Vol. 37, Issue 36, pp. 8382-8391 (1998)
http://dx.doi.org/10.1364/AO.37.008382


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Abstract

Excimer laser fragmentation-fluorescence spectroscopy is an effective detection strategy for NH3 in combustion exhausts at atmospheric pressure and high temperatures. Two-photon photofragmentation of NH3 with 193-nm light yields emission from the NH(AX) band at 336 nm. There are no major interferences in this spectral region, and the sensitivity is at the parts per billion (ppb) level. Quenching of the NH(A) state radical by the major combustion products is measured and does not limit the applicability of the detection method. Detection limits in practical situations are of the order of 100 ppb for a 100-shot (1-s) average. This technique could prove useful in monitoring ammonia emissions from catalytic and noncatalytic NO x reduction processes involving ammonia injection.

© 1998 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6410) Spectroscopy : Spectroscopy, multiphoton
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

History
Original Manuscript: June 22, 1998
Revised Manuscript: September 25, 1998
Published: December 20, 1998

Citation
Steven G. Buckley, Christopher J. Damm, Wolfgang M. Vitovec, Lee Anne Sgro, Robert F. Sawyer, Catherine P. Koshland, and Donald Lucas, "Ammonia detection and monitoring with photofragmentation fluorescence," Appl. Opt. 37, 8382-8391 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-36-8382

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