Modeling the size distribution in a fluidized bed of nanopowder

Journal article (2017)

Authors

A. Fabre ChemE/Product and Process Engineering - AS
S. Salameh ChemE/Product and Process Engineering - AS
M.T. Kreutzer ChemE/Chemical Engineering
J.R. van Ommen ChemE/Product and Process Engineering - AS
Research Group
ChemE/Product and Process Engineering (AS) (TU Delft)
Copyright: © 2017 A. Fabre, S. Salameh, M.T. Kreutzer, J.R. van Ommen
DOI
help_outline
https://doi.org/10.1016/j.powtec.2017.02.056
Model Nanoparticle Fluidization Agglomerate Size distribution
More Info
expand_more

Published Date

2017

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Product and Process Engineering

Abstract

Fluidization is a technique used to process large quantities of nanopowder with no solvent waste and a large gas–solid contact area. Nonetheless, nanoparticles in the gas phase form clusters, called agglomerates, due to the relatively large adhesion forces. The dynamics within the fluidized bed influence the mechanism of formation, and thus, the morphology of the agglomerates. There are many theoretical models to predict the average size of fluidized agglomerates; however, these estimates of the average lack information on the whole size range. Here, we predict the agglomerate size distribution within the fluidized bed by estimating the mode and width using a force balance model. The model was tested for titania (TiO2), alumina (Al2O3), and silica (SiO2) nanopowders, which were studied experimentally. An in-situ method was used to record the fluidized agglomerates for size analysis and model validation.