Quantitative behavior of potassium species on an amorphous carbon under steam gasification conditions

Masahiko Matsukata, T. Fujikawa, E. Kikuchi, Y. Morita

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    The quantitative behavior of potassium loaded on carbon black under gasification conditions (1013-1173 K; PH2O = 91 kPa) was investigated. Extraction of potassium with HCl solution is a convenient technique to determine the amount of surface potassium. The amount of potassium on the surface increased with the progress of gasification because of the appearance of potassium that was embedded in bulk carbon during pretreatment in an inert atmosphere and then decreased after reaching a maximum due to evaporation of potassium metal. Kinetic studies showed that the following three types of potassium species are formed on carbon: (1) one is fixed on the surface and is responsible for gasification; (2) one is fixed on the surface and is not responsible for gasification; (3) one is not fixed on the surface. The composition of product gases strongly depended on the amount of surface potassium. Chloride ions as counteranion retarded the migration of potassium into bulk carbon and reduced the rate of gasification per surface potassium atom.

    Original languageEnglish
    Pages (from-to)336-341
    Number of pages6
    JournalEnergy and Fuels
    Volume3
    Issue number3
    Publication statusPublished - 1989 May

    Fingerprint

    Amorphous carbon
    Steam
    Gasification
    Potassium
    Carbon
    Soot
    Carbon black
    Chlorides
    Evaporation
    Gases
    Metals
    Ions
    Atoms
    Kinetics

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Energy Engineering and Power Technology
    • Fuel Technology

    Cite this

    Quantitative behavior of potassium species on an amorphous carbon under steam gasification conditions. / Matsukata, Masahiko; Fujikawa, T.; Kikuchi, E.; Morita, Y.

    In: Energy and Fuels, Vol. 3, No. 3, 05.1989, p. 336-341.

    Research output: Contribution to journalArticle

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