Influence of K2CO3 catalyst on rate of hydrogen gasification of carbon black

Hossein Zoheidi, Dennis J. Miller

    Research output: Research - peer-reviewArticle

    • 4 Citations

    Abstract

    Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K2CO3. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.

    LanguageEnglish (US)
    Pages265-271
    Number of pages7
    JournalCarbon
    Volume25
    Issue number2
    DOIs
    StatePublished - 1987

    Profile

    Soot
    Carbon Monoxide
    Gasification
    Hydrogen
    Catalysts
    potassium carbonate
    Carbon black
    Oxygen
    Experiments
    Reaction rates
    Potassium
    Carbon
    Kinetics

    Keywords

    • Carbon black
    • gasification catalysis
    • hydrogen
    • potassium
    • potassium carbonate

    ASJC Scopus subject areas

    • Materials Chemistry

    Cite this

    Influence of K2CO3 catalyst on rate of hydrogen gasification of carbon black. / Zoheidi, Hossein; Miller, Dennis J.

    In: Carbon, Vol. 25, No. 2, 1987, p. 265-271.

    Research output: Research - peer-reviewArticle

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    abstract = "Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K2CO3. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.",
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    N2 - Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K2CO3. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.

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