Absolute diode laser-based in situ detection of HCl in gasification processes

Ortwein, P.; Woiwode, Wolfgang; Fleck, Sabine; Eberhard, M.; Kolb, Thomas; Wagner, Steven; Gisi, M.; Ebert, Volker

doi:10.1007/s00348-010-0904-2

Cited by 46 publications

(24 citation statements)

References 25 publications

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“…Finally, HCl needs to be monitored and reduced to avoid so-called catalyst poisoning [17,18] e.g. during industrial synthesis and gasification processes of biomass fuels.…”

Section: Introductionmentioning

confidence: 99%

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

Serdyukov

Gisi³

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Finally, HCl needs to be monitored and reduced to avoid so-called catalyst poisoning [17,18] e.g. during industrial synthesis and gasification processes of biomass fuels.…”

Section: Introductionmentioning

confidence: 99%

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

Serdyukov

Gisi³

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Carbon dioxide and its 13 C isotopes, for instance, have been found to be important molecules in atmospheric monitoring, breath analysis and car exhaust emission measurements [6,15,[23][24][25][26][27][28][29][30][31]. Carbon dioxide (CO 2 ) and other species have been measured, for isotope ratio analysis, industrial applications and trace gas monitoring, using different laser spectrometric techniques by several groups [32][33][34][35][36][37] with detection limits down to the pmol mol −1 level [3].…”

Section: Introductionmentioning

confidence: 99%

“…During the last decade different laser spectroscopic techniques, such as tunable diode laser absorption spectroscopy (TDLAS) and cavity ring-down spectroscopy (CRDS), have been extensively used to measure the amount fraction of different gas species [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Each technique has its own merits, consequently their choice depends on the individual field of application [12,17].…”

Section: Introductionmentioning

confidence: 99%

Laser-spectrometric gas analysis: CO₂–TDLAS at 2 µm

Nwaboh

Werhahn

Ortwein

et al. 2012

Meas. Sci. Technol.

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View the article online for updates and enhancements. Related contentMetrological quantification of CO in biogas using laser absorption spectroscopy and gas chromatography Javis A Nwaboh, Stefan Persijn, Karine Arrhenius et al. Abstract Employing direct absorption spectroscopy and using a spectrometer comprising a single-pass and a multipass white cell, we probed the R(12) line of carbon dioxide (CO 2 ) in the combination band around 2 μm. Gravimetric gas standards containing CO 2 , between 300 and 60 000 μmol mol −1 (0.03% to 6%), in N 2 were quantified by means of the TILSAM method. The spectrometric results were compared with the gravimetric reference values. We describe our implementation of the 'Guide to the Expression of Uncertainty in Measurements' to infrared laser-spectrometric gas analysis. Data quality objectives are addressed by uncertainty and traceability flags. Uncertainty budgets are presented to show the quality of the results and to demonstrate software-assisted uncertainty assessment. The relative standard uncertainties of the spectrometrically measured CO 2 amount fractions at, e.g., ambient levels of 360 μmol mol −1 and at exhaled breath gas levels of 50 mmol mol −1 were 1.4% and 0.7%, respectively. Our detection limit was 2.2 μmol mol −1. The reproducibility of individual results was in the ±1% range. Furthermore, we measured collisional broadening coefficients of the R(12) line of CO 2 at 4987.31 cm −1 . The relative standard uncertainties of the measured self-, nitrogen-, oxygen-and air-broadening coefficients were in the ±1.7% range.

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“…Employing QCLAS and CRDS, which is the focus of this manuscript, to perform absolute amount fraction measurements of different molecular species had been reported by several groups [4][5][6][7][8][9]. Some scientists have reported CO amount fraction results based on QCLAS and CRDS [2,10,11].…”

Section: Introductionmentioning

confidence: 95%

QCLAS and CRDS-Based CO Quantification as Aimed at in Breath Measurements

Nwaboh

Persijn

Heinrich

et al. 2012

International Journal of Spectroscopy

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Laser-spectrometric methods to derive absolute and traceable carbon monoxide (CO) amount fractions in exhaled human breath could be of advantage for early disease detection as well as for treatment monitoring. As proof-of-principle laboratory experiment, we employed intra-pulse and continuous wave (cw) quantum cascade laser spectroscopy (QCLAS), both at 4.6 μm. Additional experiments were carried out applying cw cavity ring-down spectroscopy (CRDS) with a CO sideband laser and a QCL. We emphasize metrological data quality objectives, thatis, traceability and uncertainty, which could serve as essential benefits to exhaled breath measurements. The results were evaluated and compared on a 100 μmol/mol CO level using the two QCLAS spectrometers, and the cw CO sideband laser CRDS setup. The relative standard uncertainties of the pulsed and the cw QCLAS CO amount fraction results were ±4.8 and ±2.8%, respectively, that from the CO sideband laser CRDS was ±2.7%. Sensitivities down to a 3 nmol/mol CO level were finally demonstrated and quantified by means of cw CRDS equipped with a QCL yielding standard uncertainties of about ±2.5 that are exclusively limited by the available line strength figure quality. With this study we demonstrate the achieved comparability of CO quantifications, adhering metrological principles.

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Absolute diode laser-based in situ detection of HCl in gasification processes

Cited by 46 publications

References 25 publications

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

Laser-spectrometric gas analysis: CO₂–TDLAS at 2 µm

QCLAS and CRDS-Based CO Quantification as Aimed at in Breath Measurements

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Absolute diode laser-based in situ detection of HCl in gasification processes

Cited by 46 publications

References 25 publications

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

FTIR-based measurements of self-broadening and self-shift coefficients as well as line strength in the first overtone band of HCl at 1.76 µM

Laser-spectrometric gas analysis: CO2–TDLAS at 2 µm

QCLAS and CRDS-Based CO Quantification as Aimed at in Breath Measurements

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Laser-spectrometric gas analysis: CO₂–TDLAS at 2 µm