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Analysis of Hydrocarbons in the Exhaust Gas of a Fusion Test Device Using Infrared Absorption Spectroscopy

Masahiro TANAKA^1,2), Hiromi KATO¹⁾ and Naoyuki SUZUKI¹⁾

1)

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan

2)

The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan

(Received 29 November 2019 / Accepted 5 February 2020 / Published 14 April 2020)

Abstract

To investigate the behavior of hydrogen isotopes in a large fusion test device, a new technique using infrared absorption spectroscopy is applied for the monitoring of hydrocarbons in exhaust gas. Fourier transform infrared (FT-IR) spectroscopy combined with a gas cell, which has an optical path length of 16 m, was installed at the plasma exhaust line. In this configuration, the detection limit of CH₄, C₂H₆, C₂H₄, and CO is at the level of sub-ppm. The exhaust gas observations were conducted during hydrogen glow discharge and during the regeneration operation of cryosorption pumps during the hydrogen plasma phase. As a result, hydrocarbons and carbon monoxide were detected in the exhaust gas, and the exhaust behavior and the ratio of gas components were determined. It is also demonstrated that light and the heavy hydrocarbons can be discriminated by the FT-IR system. Our infrared absorption spectroscopy study provides positive prospects for its application to exhaust gas analyses.

Copyright (c) 2020 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

exhaust gas monitoring, hydrocarbons analysis, FT-IR, long optical path gas cell, deuterium plasma experiment, large fusion test device

DOI: 10.1585/pfr.15.2405008

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References

• [1] H. Nakamura et al., Fusion Eng. Des. 70, 163 (2004).
• [2] K. Isobe et al., Fusion Eng. Des. 81, 827 (2006).
• [3] A. Kaminaga et al., Proc. of 20th IEEE/NPSS SOFE, 2003, pp. 144-147.
• [4] S. Grünhagen et al., Fusion Sci. Technol. 60, 931 (2011).
• [5] S. Grünhagen Romanelli et al., Phys. Scr. T159, 014068 (2014).
• [6] S.G. Romanelli et al., Fusion Sci. Technol. 71, 467 (2017).
• [7] T. Hayashi et al., Fusion Eng. Des. 84, 908 (2009).
• [8] U. Kruezi et al., Rev. Sci. Instrum. 83, 10D728 (2012).
• [9] D. Neuwirth et al., Plasma Phys. Control. Fusion 54, 085008 (2012).
• [10] J. Wang et al., Vacuum 167, 98 (2019).
• [11] M. Osakabe et al., Fusion Sci. Technol. 72, 199 (2017).
• [12] M. Osakabe et al., IEEE Trans. Plasma Sci. 46, 2324 (2018).
• [13] M. Tanaka et al., Fusion Eng. Des. 127, 275 (2018).
• [14] M. Tanaka et al., J. Radioanal. Nucl. Chem. 318, 877 (2018).
• [15] Perkin Elmer Frontier catalogue (2011).
• [16] L.G. Smith, J. Chem. Phys. 17, 139 (1949).
• [17] H.W. Thompson, Tables of Wavenumbers for the Calibration of Infra-red Spectrometers (BUTTERWORTHS, London, 1961).
• [18] E.K. Plyler et al., J. Res. Nat. Bur. Stand. A 64, 29 (1960).
• [19] J.N. Gayles, Jr. and W.T. King, Spectrochim. Acta 21, 543 (1965).
• [20] T. Shimanouchi, “Tables of molecular vibrational frequencies consolidated volume I”, Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.), 39 (1972).
• [21] S. Fukada and M. Terashita, J. Nucl. Sci. Technol. 47, 1219 (2010).