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Development of TDLAS sensor for diagnostics of CO, H2O and soot concentrations in reactor core of pilot-scale gasifier

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Abstract

This paper reports on the development of the tunable diode laser absorption spectroscopy sensor near 4350 cm−1 (2298 nm) for measurements of CO and H2O mole fractions and soot volume fraction under gasification conditions. Due to careful selection of the molecular transitions [CO (υ″ = 0 → υ′ = 2) R34–R36 and H2O at 4349.337 cm−1], a very weak (negligible) sensitivity of the measured species mole fractions to the temperature distribution inside the high-temperature zone (1000 K < T < 1900 K) of the gasification process is achieved. The selected transitions are covered by the tuning range of single diode laser. The CO and H2O concentrations measured in flat flames generally agree better than 10 % with the results of 1-D flame simulations. Calibration-free absorption measurements of studied species in the reactor core of atmospheric pilot-scale entrained-flow gasifier operated at 0.1 MW power are reported. Soot concentration is determined from the measured broadband transmittance. The estimated uncertainties in the reactor core CO and H2O measurements are 15 and 20 %, respectively. The reactor core average path CO mole fractions are in quantitative agreement with the µGC CO concentrations sampled at the gasifier output.

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Acknowledgments

This work has been performed within the platform for entrained-flow gasification (Bio4Gasification) in the Swedish Centre for Gasification financed by the Swedish Energy Agency and the member companies.

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Authors and Affiliations

  1. SP Energy Technology Center AB, Box 726, 941 28, Piteå, Sweden

    A. Sepman, Y. Ögren, M. Gullberg & H. Wiinikka

  2. Division of Energy Science, Energy Engineering, Luleå University of Technology, 971 87, Luleå, Sweden

    Y. Ögren & H. Wiinikka

Authors
  1. A. Sepman
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  2. Y. Ögren
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  3. M. Gullberg
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  4. H. Wiinikka
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Correspondence to A. Sepman.

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Sepman, A., Ögren, Y., Gullberg, M. et al. Development of TDLAS sensor for diagnostics of CO, H2O and soot concentrations in reactor core of pilot-scale gasifier. Appl. Phys. B 122, 29 (2016). https://doi.org/10.1007/s00340-016-6319-x

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  • DOI: https://doi.org/10.1007/s00340-016-6319-x

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