Concentration evaluation method using broadband absorption spectroscopy for sulfur dioxide monitoring

Xu, Feng; Lv, Zhe; Zhang, Y. G.; Somesfalean, Gabriel; Zhang, Z. G.

doi:10.1063/1.2211299

Cited by 33 publications

(21 citation statements)

References 15 publications

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“…The extrapolated minimum detectable concentration of the instrument was previously estimated to ϳ1 ppm. 15 A measurement campaign was carried out in early Spring 2006 in Harbin, China. The sensor was then tested for measurement of the SO 2 in flue gas emitted from an industrial coal-fired boiler.…”

Section: Measurement Evaluation and Resultsmentioning

confidence: 99%

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Broadband spectroscopic sensor for real-time monitoring of industrial SO_2 emissions

Zhang

Somesfalean

et al. 2007

Appl. Opt.

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A spectroscopic system for continuous real-time monitoring of SO 2 concentrations in industrial emissions was developed. The sensor is well suited for field applications due to simple and compact instrumental design, and robust data evaluation based on ultraviolet broadband absorption without the use of any calibration cell. The sensor has a detection limit of 1 ppm, and was employed both for gas-flow simulations with and without suspended particles, and for in situ measurement of SO 2 concentrations in the flue gas emitted from an industrial coal-fired boiler. The price͞performance ratio of the instrument is expected to be superior to other comparable real-time monitoring systems.

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Section: Measurement Evaluation and Resultsmentioning

confidence: 99%

“…15 Laboratory tests on static and flowing gas displayed a measurement precision of 4% and long-term reproducibility under varying pressure and temperature conditions.…”

Section: Introductionmentioning

confidence: 99%

Broadband spectroscopic sensor for real-time monitoring of industrial SO_2 emissions

Zhang

Somesfalean

et al. 2007

Appl. Opt.

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“…Several studies reported measurements of H 2 S, SO 2 and/or NO 2 using broadband absorption spectroscopy techniques in the ultraviolet region performed at atmospheric pressure [18][19][20][21][22]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Detection of H2S, SO2 and NO2 in CO2 at pressures ranging from 1- 40 bar by using broadband absorption spectroscopy in the UV/VIS range

et al. 2014

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This paper presents a methodology to quantitatively measure H 2 S, SO 2 and NO 2 fractions in gaseous CO 2 by using broadband absorption spectroscopy at 1 and 40 bar. The mole fractions of binary-and 3-component mixtures of H 2 S, SO 2 and NO 2 in CO 2 with known fractions ranging from 35-250 ppm are successfully derived from the measured absorption spectra. The difference between the fitted and experimental mole fractions is less than 10% for all studied mixtures. The results successfully demonstrate that low fractions of H 2 S, SO 2 and NO 2 in gaseous CO 2 can be accurately measured at pipeline conditions by using broad band absorption spectroscopy.

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“…However, the NO concentration measurements are hampered by the influence of SO 2 on the absorption spectrum. Sensors based on differential absorption spectroscopy in the ultraviolet (UV) wavelength region have previously been described, but the technique is grossly affected by the variation in the reference light intensity [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

An optical system for measuring nitric oxide using spectral separation techniques

Zhang

Somesfalean

Guo³

et al. 2012

Appl. Phys. B

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An optical sensor based on differential absorption spectroscopy for real-time monitoring of industrial nitric oxide (NO) gas emission is described. The influence of gas absorption interference from sulfur dioxide (SO 2 ) in the environment was considered and a spectral separation technique was developed in order to eliminate this interference effect. The absorption spectrum of SO 2 around 226 nm was evaluated by the SO 2 concentration obtained using the experimentally recorded absorption spectrum around 300 nm. The absorption spectrum of NO around 226 nm was obtained by subtracting the absorption of SO 2 from the integral absorption spectrum of SO 2 and NO. The concentration measurements were performed at atmospheric pressure. The technique was found to have a lower detection limit of 0.8 ppm for NO per meter path length (SNR = 2) and be immune from the influence from SO 2 on the NO measurement. The sensor based on this technique was successfully employed for in situ measurement of SO 2 and NO concentrations in the flue gas emitted from an industrial coal-fired boiler.

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Concentration evaluation method using broadband absorption spectroscopy for sulfur dioxide monitoring

Cited by 33 publications

References 15 publications

Broadband spectroscopic sensor for real-time monitoring of industrial SO_2 emissions

Broadband spectroscopic sensor for real-time monitoring of industrial SO_2 emissions

Detection of H2S, SO2 and NO2 in CO2 at pressures ranging from 1- 40 bar by using broadband absorption spectroscopy in the UV/VIS range

An optical system for measuring nitric oxide using spectral separation techniques

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