Mass and heat transfer between a fluidized bed and a freely moving submerged sphere

W. Prins

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademic

    1 Citation (Scopus)

    Abstract

    For fluidized bed combustion and gasification of solid fuels, but also for various other fluidized bed processes such as drying, granulation and evaporation, mass and heat transport to (or from) a particle freely moving in the fluidized bed is of great importance. The combustion rate of a millimeter-sized char particle in a fluidized bed of limestone and ash at 800 °C and 1 bar is, for instance, highly determined by the transport rate of oxygen to the char particle (char is completely devolatilized coal). At the same time it can be influenced considerably by the rate at which the generated heat of combustion is carried off to the bed. As another example, the rate of volatiles release during the first 10 to 20 seconds of the coal particle's residence in the fluidized bed is largely controlled by the transport of heat from the dense phase of the fluidized bed to the devolatiHzing coal particle.
    Original languageEnglish
    Title of host publicationAtmospheric Fluidized Bed Coal Combustion
    Subtitle of host publicationResearch, Development and Application
    EditorsM. Valk
    Place of PublicationAmsterdam
    PublisherElsevier
    Pages335-352
    Number of pages18
    ISBN (Print)978-0-444-81932-1
    Publication statusPublished - 1995

    Publication series

    NameCoal Science and Technology
    PublisherElsevier
    Volume22

    Keywords

    • METIS-107075

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