Thermogravimetric studies of high temperature reactions between potassium salts and chromium

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    Sammanfattning

    This study compares the high temperature reactions of potassium chloride (KCl) and potassium carbonate (K2CO3), two salts found in fly ashes formed in biomass combustion, with both pure metallic chromium (Cr) and chromium oxide (Cr2O3). The reactions were investigated with thermogravimetric measurements and the results discussed based on thermodynamic calculations. In simple terms: potassium chloride reacted with chromium forming potassium chromate (K2CrO4) and chromium oxide. Potassium chloride did not react with chromium oxide. Potassium carbonate reacted with chromium oxide, but not with chromium. The presence of potassium is sufficient to initiate accelerated oxidation, but chloride is needed to sustain it.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)55–62
    Antal sidor8
    TidskriftCorrosion Science
    Volym59
    DOI
    StatusPublicerad - 2012
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • High temperature corrosion
    • Molten salts
    • SEM

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