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Proceedings Paper

Dynamic derivative UV spectroscopy for combustion monitoring
Author(s): Karsten Sassenscheid; Ulrich Klocke; C. Marb; H. Riedel; Gerhard Schmidtke; Maurus Tacke
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Paper 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.

Paper Details

Date Published: 22 January 1999
PDF: 11 pages
Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); doi: 10.1117/12.337466
Show Author Affiliations
Karsten Sassenscheid, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Ulrich Klocke, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
C. Marb, Bayerisches Landesamt fuer Umweltschutz (Germany)
H. Riedel, Bayerisches Landesamt fuer Umweltschutz (Germany)
Gerhard Schmidtke, Fraunhofer-Institute of Physical Measurement Techniques (Germany)
Maurus Tacke, Fraunhofer-Institute of Physical Measurement Techniques (Germany)

Published in SPIE Proceedings Vol. 3535:
Advanced Sensors and Monitors for Process Industries and the Environment
Wim A. de Groot, Editor(s)

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