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Proceedings Paper

Development of a nondispersive UV-visible analyzer for simultaneous measurements of SO2 and NO2 in stacks emissions
Author(s): Daniel C. Schinca; Gustavo Ratto; Fabian Videla; Edmundo J. Rodriguez; Roberto E. Di Paolo; Jorge O. Tocho
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Paper Abstract

12 Non-dispersive analyzers have been used for measurement of gases for many years and were recently introduced as on-line meters for continuous stack emission measurements in industrial plants. SO2 and NO2 are among the most important gases in the emissions of the petrochemical industry. The development of a UV-visible meter for these gases is presented. It consists of three optical channels sensing different spectral regions: 300 nm for SO2, 380 nm for NO2 and 320 nm used as a common reference. Each channel has an interference filter of 10 nm bandwidth centered at each channel's wavelength. Each filter is followed by a photodiode and its electronics which are housed in a single compartment with no moving parts. An incandescent lamp with high output in the UV region was selected and mounted on the opposite side of the stack by appropriate flanges. The equipment was designed to measure in the range between 0 and 500 ppmv with a resolution of about 2 ppmv. Performance parameters like signal stability, dark current, detection limit and calibration curves are shown.

Paper Details

Date Published: 13 February 2001
PDF: 7 pages
Proc. SPIE 4201, Optical Methods for Industrial Processes, (13 February 2001); doi: 10.1117/12.417382
Show Author Affiliations
Daniel C. Schinca, Univ. Nacional de La Plata (Argentina) and Ctr. de Investigaciones Opticas (Argentina) (Argentina)
Gustavo Ratto, Ctr. de Investigaciones Opticas (Argentina)
Fabian Videla, Univ. Nacional de La Plata (Argentina) and Ctr. de Investigaciones Opticas (Argentina) (Argentina)
Edmundo J. Rodriguez, Ctr. de Investigaciones Opticas (Argentina)
Roberto E. Di Paolo, Univ. Nacional de La Plata (Argentina) and Ctr. de Investigaciones Opticas (Argentina) (Argentina)
Jorge O. Tocho, Univ. Nacional de La Plata (Argentina) and Ctr. de Investigaciones Opticas (Argentina) (Argentina)


Published in SPIE Proceedings Vol. 4201:
Optical Methods for Industrial Processes
Stuart Farquharson, Editor(s)

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