Dynamic derivative UV spectroscopy for combustion monitoring

Karsten Sassenscheid; Ulrich Klocke; C. Marb; H. Riedel; Gerhard Schmidtke; Maurus Tacke

doi:10.1117/12.337466

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22 January 1999 Dynamic derivative UV spectroscopy for combustion monitoring

Karsten Sassenscheid, Ulrich Klocke, C. Marb, H. Riedel, Gerhard Schmidtke, Maurus Tacke

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Proceedings Volume 3535, Advanced Sensors and Monitors for Process Industries and the Environment; (1999) https://doi.org/10.1117/12.337466
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

Derivative UV-absorption spectroscopy is a powerful spectroscopic technique for multicomponent gas analysis, particularly in combustion and process controlling applications. It offers enhanced selectivity and sensitivity compared to conventional techniques. We here report on a test of a special system with optical derivative generation in a waste incineration plant. Gas analysis is performed by transmission spectroscopy. A deuterium lamp is used as UV- source. Spectroscopic filtering is provided by a special grating monochromator. The grating is mounted on a galvanometer scanner, thus allowing a computer controlled wavelength scan and modulation. Signal analysis is performed with lock-in amplifier. The is from of detection for derivative spectra with a movable optical component is the origin of the term DYnamic Derivative Spectroscopy (DDS). The performance of this spectroscopic technique was demonstrated in a measurement campaign at a municipal solid waste incineration plant. The sensitivity for relevant gases is blow ppm level with an optical cell length of 10cm. The basics of the DDS and its performance will be explained, and data on NO, SO₂ and NO₂ will be reported.

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Karsten Sassenscheid, Ulrich Klocke, C. Marb, H. Riedel, Gerhard Schmidtke, and Maurus Tacke "Dynamic derivative UV spectroscopy for combustion monitoring", Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); https://doi.org/10.1117/12.337466

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