Abstract
The principles on which the performance of a full-scale fluidized-bed reactor may be inferred from that of a cold, scaled-down model are outlined and lead to a review of the scaling rules developed in the recent past. Dimensional analysis based on the Buckingham π-theorem is described as well as the alternative approach based on the governing equations of conservation of mass and momentum of fluidized particles. Examples are given of both rigorous and simplified sets of dimensionless groups appropriate to the scaling process and a description is given of the way they are applied to bubbling beds. This is followed by a consideration of the scaling relationships relevant to circulating fluidized-bed combustors where additional groups such as the Damköhler numbers can be applied. Work on the validation of the scaling rules is then described and leads to a section in which scaling is analysed in terms of the non-linear chaotic behaviour of fluidized beds. The chapter ends with a description of the application of the scaling rules to a scaled-down model of a thermal denitration reactor and its internal structure as revealed by X-ray analysis.
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Yates, J.G., Lettieri, P. (2016). Fluidized-Bed Scaling. In: Fluidized-Bed Reactors: Processes and Operating Conditions. Particle Technology Series, vol 26. Springer, Cham. https://doi.org/10.1007/978-3-319-39593-7_6
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DOI: https://doi.org/10.1007/978-3-319-39593-7_6
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