Control of particle cohesion with a polymer coating and temperature adjustment

Authors

  • J. Bouffard,

    1. Dept. of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Stn. Centre-Ville, Qc, Canada H3C 3A7
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  • F. Bertrand,

    Corresponding author
    1. Dept. of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Stn. Centre-Ville, Qc, Canada H3C 3A7
    • Dept. of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Stn. Centre-Ville, Qc, Canada H3C 3A7===

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  • J. Chaouki,

    Corresponding author
    1. Dept. of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Stn. Centre-Ville, Qc, Canada H3C 3A7
    • Dept. of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Stn. Centre-Ville, Qc, Canada H3C 3A7===

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  • S. Giasson

    1. Dept. of Chemistry and Faculty of Pharmacy, Université de Montréal, C.P. 6128, Stn. Centre-Ville, Montréal, Québec, Canada H3C 3J7
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Abstract

A new approach is presented that introduces interparticle forces induced by a change of temperature at which polymer coated particles are exposed. The particle cohesive flow behavior is shown for two different applications. The first one considers a dense granular flow that is typically observed for wet powder granulation using a modified spheronizer. The other application shows the possibility of mimicking the particle flow behavior observed in high-temperature fluidized beds with the advantage of being operated at ambient conditions. For the first application, as the temperature increases, significant changes in the particle bed surface morphology were observed and an important reduction of the dynamic density was noticed. For the gas–solid fluidized-bed application, pressure drop measurements revealed that the behavior of the particles transited from Geldart group B to Geldart group A and even Geldart group C as the temperature increased. © 2012 American Institute of Chemical Engineers AIChE J, 2012

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