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Proceedings Paper

Photoacoustic system for NH3 detection in a selective catalytic reactor
Author(s): Nice Pintus; Isabella Carrer; Ada Del Corno; Lorenzo Fiorina; Eugenio Zanzottera
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Paper Abstract

A new instrument specifically developed for measuring NH3 concentrations at the inlet and outlet of an SCR reactor is described. It is based on the photoacoustic technique and can perform an online and in-situ n-point measurement grid. The major problem is the severe interference of CO2 combustion gas that absorbs at the same wavelength used for NH3, lowering the sensitivity of the technique. A 13CO2 tunable laser emitting at three wavelengths has been used in order to evaluate simultaneously the CO2 and NH3 concentration. The integrated measurements have been done by a simple differential absorption technique by using a pyroelectric detector; the spatially resolved measurements have been carried out through the analysis of the acoustic wave generated by the laser beam and collected by four microphones perpendicularly disposed. Experimental tests on a 35 MW industrial plant and comparison with traditional sampling methods are presented.

Paper Details

Date Published: 20 September 1995
PDF: 7 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221027
Show Author Affiliations
Nice Pintus, ENEL SpA (Italy)
Isabella Carrer, CISE Tecnologie Innovative SpA (Italy)
Ada Del Corno, CISE Tecnologie Innovative SpA (Italy)
Lorenzo Fiorina, CISE Tecnologie Innovative SpA (Italy)
Eugenio Zanzottera, CISE Tecnologie Innovative SpA (Italy)

Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements
Peter Fabian; Volker Klein; Maurus Tacke; Konradin Weber; Christian Werner, Editor(s)

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