Photoacoustic system for on-line process monitoring of hydrogen sulfide (H2S) concentration in natural gas streams

A. Varga, Z. Bozóki, M. Szakáll, G. Szabó

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

A dual-channel hydrogen sulfide (H2S) concentration measuring system based on photoacoustic spectroscopy is described. The system uses a single-mode, fiber-coupled, room-temperature-operated, telecommunication-type diode laser with a wavelength of 1574.5 nm and an output optical power of 40 mW and two identical resonant photoacoustic cells to achieve minimum detectable H2S concentration at 0.5 ppm (3σ) in both measured natural gas streams. The instrument features excellent long-term stability and unattended automatic on-line monitoring even when operated in harsh industrial environments. The potentially deteriorating effect of temporal variation in the natural gas composition was successfully suppressed by applying a spectral baseline correction method and by introducing an additional measurement phase with measurement of a reference gas from which the H2S has been removed. Various tests of the instrument demonstrate its reliable performance and suitability for process-control application.

Original languageEnglish
Pages (from-to)315-321
Number of pages7
JournalApplied Physics B: Lasers and Optics
Volume85
Issue number2-3
DOIs
Publication statusPublished - Nov 2006

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gas streams
hydrogen sulfide
natural gas
photoacoustic spectroscopy
gas composition
telecommunication
semiconductor lasers
fibers
output
room temperature
cells
gases
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

Photoacoustic system for on-line process monitoring of hydrogen sulfide (H2S) concentration in natural gas streams. / Varga, A.; Bozóki, Z.; Szakáll, M.; Szabó, G.

In: Applied Physics B: Lasers and Optics, Vol. 85, No. 2-3, 11.2006, p. 315-321.

Research output: Contribution to journalArticle

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