Abstract
A laser gas monitoring system has been developed to measure in situ concentrations of ammonia at various temperatures. The concentration is determined by measuring absorption with a tunable 13CO2 waveguide laser that is frequency modulated between two adjacent emission lines. One line coincides with a strong ammonia absorption line, while the other is used as a reference. By this referencing the system is autocalibrated continuously. The high spectral resolution of the laser suppresses interferences by other species. The system was built up to be used in industrial environment and was successfully applied in the chemical industry and in several power plants. A detection limit of 1 ppm could be reached at a time constant of 5 s.
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References
F. Allario, R.K. Seals: Appl. Opt. 14, 2229 (1975)
D. Bicanic: UNESCO-IAEA Winter College (1987)
A.M. Erken: VGB Konferenz „Kraftwerk und Umwelt 1987“
F. Janssen, F. v. d. Kerkhof, J.B. Lefers, P. Lodder, L.J. Luierweert: Anal. Chim. Acta 190, 245 (1986)
H. Wolf, W.J. Riedel: In Monitoring of gaseous pollutants by tunable diode lasers, ed. by R. Grisar, H. Preier, G. Schmidtke, G. Restelli (Reidel, Dordrecht 1987)
K. Gregorius, H. Schörner: In Monitoring of gaseous pollutants by tunable diode lasers, ed. by R. Grisar, H. Preier, G. Schmidtke, G. Restelli (Reidel, Dordrecht 1987)
G. Mittelbach, H. Voje: VGB Handbuch: „NO x -Bildung und Minderung bei Dampferzeugern mit fossilen Brennstoffen“ (1986)
A. Kaldor, R.L. Woodin: Proc. IEEE 70, 565 (1982)
VDI Special: „NO x -Minderung in Rauchgasen“ (VDI Verlag, Düsseldorf 1987)
Fachbericht 86/1, Badenwerk AG, Karlsruhe (1986)
Fachbericht 88/1, Badenwerk AG, Karlsruhe (1988)
J. Wolfrum: TECFLAM Berichte 1, 7 (1985)
A. Olafsson, M. Hammerich, J. Bülow, J. Henningsen: Appl. Phys. B 49, 91 (1989)
A. Mayer, J. Comera, H. Charpentier, C. Jaussaud: Appl. Opt. 17, 391 (1978)
R.R. Patty, G.M. Russwurm, W.A. McClenny, D.R. Morgan: Appl. Opt. 13, 2850 (1974)
S. Kornilov, E. Protsenko, S. Chirikov: Appl. Phys. B 39, 135 (1986)
H. Neckel, J. Wolfrum: J. Appl. Phys. B 49, 85 (1989)
E.D. Hinkley, R.T. Ku, P.L. Kelley: In Laser Monitoring of the Atmosphere, ed. by E.D. Hinkley (Springer, Berlin, Heidelberg 1976)
L.S. Rothman, A. Goldman, J.R. Gillis, R.R. Gamache, H.M. Picket, R.L. Poynter, N. Husson, A. Chedin: Appl. Opt. 22, 1616 (1983)
F.W. Taylor: J. Quant. Spectr. Radiat. Transfer 13, 1181 (1973)
A. Stein, B. Perry, D. Todd: Appl. Opt. 22, 3378 (1983)
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Meienburg, W., Neckel, H. & Wolfrum, J. In situ measurement of ammonia with a 13CO2-waveguide laser system. Appl. Phys. B 51, 94–98 (1990). https://doi.org/10.1007/BF00326006
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DOI: https://doi.org/10.1007/BF00326006