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    A review on ash formation during pulverized fuel combustion: State of art and future research needs

    Access Status
    Fulltext not available
    Authors
    Shah, K.
    Cieplik, M.
    Vuthaluru, Hari
    Date
    2015
    Type
    Book Chapter
    
    Metadata
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    Citation
    Shah, K. and Cieplik, M. and Vuthaluru, H. 2015. A review on ash formation during pulverized fuel combustion: State of art and future research needs, in Ravindra, P. (ed), Advances in Bioprocess Technology, pp. 27-56. Switzerland: Springer.
    Source Title
    Advances in Bioprocess Technology
    DOI
    10.1007/978-3-319-17915-5_3
    ISBN
    9783319179148
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/8143
    Collection
    • Curtin Research Publications
    Abstract

    Solid hydrocarbon fuels-coal and biomass are commonly used for large-scale heat and power generation worldwide. The solid incombustible ash, residing from combustion, leads to several operational issues. Ash-related problems such as slagging, fouling, corrosion, erosion (all resulting in boiler efficiency reduction), emissions of particulate matter and reuse or disposal of captured ashes, may restrict future use of the said fuels. The above mentioned technical bottlenecks are closely related with fuel and combustion process characteristics, as during the combustion process, solid fuel particle undergoes several physical and chemical transformations, which all depend on both the fuel ash chemistry as well as combustion technology. The said transformations include volatilization, fragmentation, chemical reactions, nucleation, coagulation, homogeneous/heterogeneous condensation, All of these processes play a role in the formation of submicron through coarse-sized ash particles are generated. The present paper provides a synthesis of available information on typical fuel characteristics and operating parameters responsible for the said transformations and final size distribution of the ash particles based on critically reported investigations and modeling efforts to date. The fuel characteristics addressed in the review are fuel mineral matter composition and its association (mineralogy), particles' size, shape and density, as well as char structure etc. Also reviewed is the interrelation between the fuel characteristics with operating parameters essential for the understanding of ash transformations. Descriptions of a variety of analytical methods applied to quantify the parameters responsible for ash formation are also covered, including the recognition of modeling efforts to date (from the simple calculations to advance numerical simulations).

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