Liquid phase axial mixing in solid–liquid circulating multistage fluidized bed: CFD modeling and RTD measurements

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dc.contributor.author Kalaga, Dinesh V.
dc.contributor.author Reddya, Rupesh K.
dc.contributor.author Joshi, Jyeshtharaj B.
dc.contributor.author Nandkumar, K.
dc.contributor.author Dalvi, Sameer V.
dc.date.accessioned 2014-03-16T12:23:15Z
dc.date.available 2014-03-16T12:23:15Z
dc.date.issued 2012-05
dc.identifier.citation Kalaga, Dinesh V. et al., “Liquid phase axial mixing in solid–liquid circulating multistage fluidized bed: CFD modeling and RTD measurements”, Chemical Engineering Journal, DOI: 10.1016/j.cej.2012.02.091, vol. 191, pp. 475-490 May 2012. en_US
dc.identifier.issn 1385-8947
dc.identifier.uri http://dx.doi.org/10.1016/j.cej.2012.02.091
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/786
dc.description.abstract Liquid phase residence time distribution (RTD) studies have been performed in conventional solid–liquid fluidized bed (SLFB) and solid–liquid circulating multistage fluidized bed (SLCMFB). The riser column was made up of 50 mm i.d. and 2 m long glass pipe while the multistage down comer column (glass) consisted of seven stages of 100 mm i.d. and 100 mm long sections each having perforated plate as a distributor (having 480 holes of 2 mm diameter). RTD experiments for SLFB were carried out in the column having the same diameter as the downcomer of SLCMFB. RTD has been estimated for both the riser column and the multistage column of SLCMFB. Computational fluid dynamic (CFD) simulations of SLFB and riser section of SLCMFB have been performed to predict the RTD. In all the above cases good agreement was found between the CFD predictions and the experimental measurements. Ion exchange resins and glass beads were used as a solid phase and water as a fluidizing medium. The dispersion characteristics of SLFB and SLCMFB have been investigated for resin particles with size range of 0.36–0.72 mm and glass beads with size range of 0.1–0.7 mm. It was observed that the liquid phase axial dispersion coefficient depends strongly on superficial liquid velocity, particle size and particle density. Based on the experimental data, empirical correlations have been proposed for liquid phase axial dispersion coefficient and have been found to be applicable to all the available data in the published literature. en_US
dc.description.statementofresponsibility by Dinesh V. Kalaga et al.,
dc.format.extent Vol. 191, pp. 475-490
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Computational fluid dynamics en_US
dc.subject Circulating fluidized bed en_US
dc.subject Circulating multistage fluidized beds en_US
dc.subject Fluidized beds en_US
dc.subject Liquid phase axial mixing en_US
dc.title Liquid phase axial mixing in solid–liquid circulating multistage fluidized bed: CFD modeling and RTD measurements en_US
dc.type Article en_US
dc.relation.journal Chemical Engineering Journal


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