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State analysis of sulfur in coal and coal fly ash by double-crystal X-ray fluorescence spectrometry

Bestimmung der Wertigkeit des Schwefels in Kohle und Flugasche durch Doppelkristall-Röntgenfluoreszenz-Spektrometrie

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Summary

Double-crystal high-resolution X-ray fluorescence spectrometry was applied to the state analysis of sulfur in coal and related fly ash. For total sulfur, a proportional relationship exists between fluorescence intensities and the analytical values obtained by the oxygen-combustion method. Two oxidation states of sulfur were identified by a least square curve fitting method, by assuming that the spectrum profile is identical for each sulfur state but the intensity and the position are different. Sulfur in coal mainly consists of S2−, whereas that in coal fly ash mainly consists of S6+. As much as 0.04–0.08% of S2− remains in fly ash.

Zusammenfassung

Für den Gesamtschwefel in Kohle besteht Proportionalität zwischen Fluoreszenzintensität und den durch Verbrennung in Sauerstoff erhaltenen Analysenergebnissen. Zwei Wertigkeitsstufen des Schwefels wurden nachgewiesen, wobei angenommen wurde, daß das Spektrum für jede Wertigkeitsstufe identisch, aber seiner Lage und Intensität nach verschieden ist. Der in Kohle enthaltene Schwefel besteht hauptsächlich aus S2−, der in Flugasche enthaltene vor allem aus S6+, 0,04–0,08% S2− verbleiben in der Flugasche.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Science, Science University of Tokyo, 1-3, Kagurazaka, Shinjuku-ku, 162, Tokyo, Japan

    T. Kikuchi

  2. Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, 113, Tokyo, Japan

    Y. Gohshi

  3. Department of Applied Chemistry, Faculty of Science, Science University of Tokyo, 1–3, Kagurazaka, Shinjuku-ku, 162, Tokyo, Japan

    K. Furuya

Authors
  1. K. Furuya
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  2. Y. Kato
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  3. T. Kikuchi
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  4. Y. Gohshi
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Furuya, K., Kato, Y., Kikuchi, T. et al. State analysis of sulfur in coal and coal fly ash by double-crystal X-ray fluorescence spectrometry. Mikrochim Acta 80, 263–270 (1983). https://doi.org/10.1007/BF01213120

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  • DOI: https://doi.org/10.1007/BF01213120

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