The dissolution kinetics of gibbsite in sodium hydroxide at ambient pressure

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    Abstract

    The dissolution kinetics of pure gibbsite in concentrated sodium hydroxide solutions was studied. The experiments were performed under ambient pressure and at 60-85 degrees C. The changes in morphology of the solid phase were studied during the reaction by particle size, porosity, and surface area measurements as well as scanning electron microscopy. Reaction rates were observed to be strongly dependent on temperature and hydroxide concentration. Several kinetic models, based on different representation of the surface area of gibbsite, were compared to the experimental data and a good correlation between a model incorporating rough/porous geometry and the experimental data was obtained.
    Original languageUndefined/Unknown
    Pages (from-to)2600–2607
    Number of pages8
    JournalIndustrial & Engineering Chemistry Research
    Volume49
    Issue number6
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

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