A new approach to the mechanisms of agglomeration in fluidized beds based on Spatial Filter Velocimetry measurements

Spatial Filter Velocimetry (SFV) is a technique that has been used for agglomeration processes during the past few years as it can monitor, control, and understand granulation and its implications in particle size distribution. This work has considered and aimed to analyze the evolution of the proce...

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Bibliographic Details
Published in:Powder technology 2021-11, Vol.393, p.219-228
Main Authors: Nascimento, Raul Favaro, Ávila, Mariana Ferreira, Taranto, Osvaldir Pereira, Kurozawa, Louise Emy
Format: Article
Language:English
Subjects:
Agglomeration
Air temperature
Cellulose
Coalescence
Confidence intervals
Crystalline cellulose
Flow rates
Flow velocity
Fluidization
Fluidized beds
Granulation
Maltodextrin
Moisture content
Nucleation
Particle size
Particle size classes
Particle size distribution
Size distribution
Spatial filtering
Stabilization
Velocimetry
Water content
Wetting
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Summary:Spatial Filter Velocimetry (SFV) is a technique that has been used for agglomeration processes during the past few years as it can monitor, control, and understand granulation and its implications in particle size distribution. This work has considered and aimed to analyze the evolution of the process as time goes on and in real-time and the influence of operating conditions on the process. A Plackett-Burman design was proposed with seven factors and three replicates at the central point condition, using microcrystalline cellulose (CMC) as the raw material and a maltodextrin solution as a liquid binder. Binder concentration, binder flow rate, powder initial moisture content, and fluidizing air temperature were significant at a 90% confidence level. A new approach was proposed for delimiting the stages of the fluidized bed agglomeration process, based on particle size classes that were obtained from the SFV probe data. [Display omitted] •D50v and PSD increase due to high binder concentration.•SFV probe provides particle chord length throughout the agglomeration process.•Particle size classes delimit the agglomeration steps.•The SFV measurements and particle size classes determine a new approach to agglomeration.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2021.07.076