Time scale analysis for fluidizedbedmeltgranulation-II: binder spreading rate

Kel W. Chua; Yassir Makkawi; Buddhi N. Hewakandambyc; Michael J. Hounslowa

doi:10.1016/j.ces.2010.10.032

Time scale analysis for fluidizedbedmeltgranulation-II: binder spreading rate

Kel W. Chua, Yassir Makkawi, Buddhi N. Hewakandambyc, Michael J. Hounslowa

Research output: Contribution to journal › Article › peer-review

Abstract

The spreading time of liquid binder droplet on the surface a primary particle is analyzed for Fluidized Bed Melt Granulation (FBMG). As discussed in the first paper of this series (Chua et al., in press) the droplet spreading rate has been identified as one of the important parameters affecting the probability of particles aggregation in FBMG. In this paper, the binder droplet spreading time has been estimated using Computational Fluid Dynamic modeling (CFD) based on Volume of Fluid approach (VOF). A simplified analytical solution has been developed and tested to explore its validity for predicting the spreading time. For the purpose of models validation, the droplet spreading evolution was recorded using a high speed video camera. Based on the validated model, a generalized correlative equation for binder spreading time is proposed. For the operating conditions considered here, the spreading time for Polyethylene Glycol (PEG1500) binder was found to fall within the range of 10-2 to 10-5 s. The study also included a number of other common binders used in FBMG. The results obtained here will be further used in paper III, where the binder solidification rate is discussed.

Original language	English
Pages (from-to)	327-335
Number of pages	9
Journal	Chemical Engineering Science
Volume	66
Issue number	3
DOIs	https://doi.org/10.1016/j.ces.2010.10.032
Publication status	Published - 1 Feb 2011

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chua, Kel W.; Makkawi, Yassir and Hounslow, Michael J. (2011). Time scale analysis for fluidizedbedmeltgranulation III: binder solidification rate. Chemical Engineering Science, 66 (3), 336-341. DOI 10.1016/j.ces.2010.10.032

Keywords

fluidization
granulation
binder spreading
VOF modeling
particle processing
particle technology

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Time_scale_analysis-II.pdf
NOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chua, Kel W.; Makkawi, Yassir and Hounslow, Michael J. (2011). Time scale analysis for fluidizedbedmeltgranulation III: binder solidification rate. Chemical Engineering Science, 66 (3), 336-341. DOI 10.1016/j.ces.2010.10.032

http://dx.doi.org/10.1016/j.ces.2010.10.032

Cite this

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title = "Time scale analysis for fluidizedbedmeltgranulation-II: binder spreading rate",

abstract = "The spreading time of liquid binder droplet on the surface a primary particle is analyzed for Fluidized Bed Melt Granulation (FBMG). As discussed in the first paper of this series (Chua et al., in press) the droplet spreading rate has been identified as one of the important parameters affecting the probability of particles aggregation in FBMG. In this paper, the binder droplet spreading time has been estimated using Computational Fluid Dynamic modeling (CFD) based on Volume of Fluid approach (VOF). A simplified analytical solution has been developed and tested to explore its validity for predicting the spreading time. For the purpose of models validation, the droplet spreading evolution was recorded using a high speed video camera. Based on the validated model, a generalized correlative equation for binder spreading time is proposed. For the operating conditions considered here, the spreading time for Polyethylene Glycol (PEG1500) binder was found to fall within the range of 10-2 to 10-5 s. The study also included a number of other common binders used in FBMG. The results obtained here will be further used in paper III, where the binder solidification rate is discussed.",

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note = "NOTICE: this is the author{\textquoteright}s version of a work that was accepted for publication in Chemical Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chua, Kel W.; Makkawi, Yassir and Hounslow, Michael J. (2011). Time scale analysis for fluidizedbedmeltgranulation III: binder solidification rate. Chemical Engineering Science, 66 (3), 336-341. DOI 10.1016/j.ces.2010.10.032",

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AB - The spreading time of liquid binder droplet on the surface a primary particle is analyzed for Fluidized Bed Melt Granulation (FBMG). As discussed in the first paper of this series (Chua et al., in press) the droplet spreading rate has been identified as one of the important parameters affecting the probability of particles aggregation in FBMG. In this paper, the binder droplet spreading time has been estimated using Computational Fluid Dynamic modeling (CFD) based on Volume of Fluid approach (VOF). A simplified analytical solution has been developed and tested to explore its validity for predicting the spreading time. For the purpose of models validation, the droplet spreading evolution was recorded using a high speed video camera. Based on the validated model, a generalized correlative equation for binder spreading time is proposed. For the operating conditions considered here, the spreading time for Polyethylene Glycol (PEG1500) binder was found to fall within the range of 10-2 to 10-5 s. The study also included a number of other common binders used in FBMG. The results obtained here will be further used in paper III, where the binder solidification rate is discussed.

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Time scale analysis for fluidizedbedmeltgranulation-II: binder spreading rate

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