Influence of drying conditions on the acacia gum particle growth in fluidized bed agglomeration: in-line monitoring of particle size

Acacia gum is an important food emulsifier that presents poor instant properties which can be improved by fluidized bed agglomeration. This study investigated the influence of drying conditions on particle growth kinetics using an in-line particle size monitoring by spatial filter velocimetry. The drying conditions varied according to the binder flow rate and the fluidizing air temperature. The particle growth kinectis showed drying conditions dependence. At mild drying conditions the growth rate and the process yield were higher. The in-line particle size monitoring was useful to observe the influence of the drying conditions on the growth kinetics.Keywords: fluidized bed agglomeration; acacia gum; particle growth kinectis; in-line monitoring.

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Changes in Structural and Rheological Properties of Guar Gum Particles in Fluidized-Bed Agglomeration: Effect of Sucrose Binder Concentration

Foods ◽

10.3390/foods11010073 ◽

2021 ◽

Vol 11 (1) ◽

pp. 73

Author(s):

Donghyeon Lee ◽

Byoungseung Yoo

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Guar Gum ◽

Sucrose Concentration ◽

Ftir Spectra ◽

Sem Images ◽

Low Concentrations ◽

Binder Concentration ◽

Bed Agglomeration ◽

Xrd Patterns

Fluidized-bed agglomeration (FBA) is known to modify the structure and rheology of food powders. In this study, guar gum (GG) powders with various concentrations of sucrose binder (0%, 10%, 20%, or 30%) were subjected to fluidized-bed agglomeration. Subsequently, changes in the characteristics of the GG powders were evaluated by using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), particle size distribution (PSD) analysis, and rheological and dispersibility measurements. SEM images and FTIR spectra revealed surface morphology changes and structural modification, respectively, in the original GG powder after FBA, although the changes observed in FTIR spectra were only slightly dependent on sucrose concentration at low concentrations (0–20%). XRD patterns confirmed that the crystallinity of the GG powder was affected by FBA, but not greatly so by binder concentration. The PSD results showed that the GG particle size was increased by FBA and there was a clear relationship between sucrose concentration (10–30%) and mean particle size. The rheological behavior and dispersibility of GG (properties that are known to be affected by the structure of a powder) were also influenced by sucrose concentration. To sum up, FBA and the concentration of sucrose binder used can serve as factors for modifying GG powder.

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In-line particle size measurement and process influences on rotary fluidized bed agglomeration

Powder Technology ◽

10.1016/j.powtec.2020.02.034 ◽

2020 ◽

Vol 364 ◽

pp. 673-679

Author(s):

Marcel Langner ◽

Ivonne Kitzmann ◽

Anna-Lena Ruppert ◽

Inken Wittich ◽

Bertram Wolf

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Size Measurement ◽

Particle Size Measurement ◽

Bed Agglomeration

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In-line particle size measurement and agglomeration detection of pellet fluidized bed coating by Spatial Filter Velocimetry

Powder Technology ◽

10.1016/j.powtec.2016.06.009 ◽

2016 ◽

Vol 301 ◽

pp. 261-267 ◽

Cited By ~ 16

Author(s):

Dimitri Wiegel ◽

Günter Eckardt ◽

Florian Priese ◽

Bertram Wolf

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Spatial Filter ◽

Size Measurement ◽

Particle Size Measurement ◽

Fluidized Bed Coating

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Agglomeration of hydrolyzed collagen with blackberry pulp in a fluidized bed

Proceedings of 21th International Drying Symposium ◽

10.4995/ids2018.2018.7347 ◽

2018 ◽

Author(s):

Thayná R Viegas ◽

Osvaldir Pereira Taranto

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Water Activity ◽

Fine Particles ◽

Fine Powder ◽

Food Ingredient ◽

Process Yield ◽

Food Industries ◽

Hydrolyzed Collagen ◽

Total Anthocyanins

Hydrolyzed collagen (HC) is a fine powder applied in the pharmaceutical and food industries which has shown good results in the treatment of diseases related to bones, skin and joints. In this study, HC particles were agglomerated in order to increase particle size, optimizing its use as a food ingredient, its handling and its storage. Agglomeration is a process that not only enlarge the size of fine particles, but also improves its properties, such as instantanization time and flowability. The aim of this work was the agglomeration of HC in a fluidized bed having blackberry pulp as a liquid binder. A full factorial design 22 was used to study the effect of the temperature of the fluidizing air (60, 70, 80ºC) and the flow rate of the liquid binder (0.8, 1.2, 1.6 mL/min) on the process yield, mean particle size, water activity and total anthocyanins content. It was observed that anthocyanins content from the blackberry pulp had higher values with lower temperatures. Water activity had lower values with higher temperatures, but in all conditions, it was lower than 0.6. The enlargement of the granules was observed in all conditions studied, increasing up to 275%. Process yield varied from 67,9 to 80,0%. In all conditions, the instantanization time and flowability improved compared to hydrolyzed collagen before agglomeration.Keywords: hydrolyzed collagen; agglomeration; granulation; fluidized bed; blackberry pulp

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Influence of drying conditions on process properties and parameter identification for continuous fluidized bed spray agglomeration

Proceedings of 21th International Drying Symposium ◽

10.4995/ids2018.2018.7319 ◽

2018 ◽

Author(s):

Gerd Strenzke ◽

Ievgen Golovin ◽

Maximilian Wegner ◽

Stefan Palis ◽

Andreas Bück ◽

...

Keyword(s):

Fluidized Bed ◽

Feed Rate ◽

Continuous Process ◽

Binder Content ◽

Balance Model ◽

Process Stability ◽

Primary Particles ◽

Bed Agglomeration ◽

Drying Conditions ◽

Population Balances

Agglomeration is a particle formulation process in which at least two primary particles are combined to form a new one. The growth of agglomerates depends on interactions of particles covered with wet spots that generated by depositions of binder droplets. This work experimentally compares the influence of external feed rate and sprayed binder content on product properties and process stability with internal separation at different drying conditions. Due to the identification of parameters a populations balance model (PBM) is developed. The PBM includes the agglomeration kernel function, which characterizes the kinetics, i.e. the rate at which primary particles build agglomerates. Keywords: spray fluidized bed agglomeration; drying; continuous process; internal separation; population balances

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Particle size monitoring in a fluidized bed using pressure fluctuations

Powder Technology ◽

10.1016/j.powtec.2007.02.026 ◽

2008 ◽

Vol 180 (3) ◽

pp. 307-311 ◽

Cited By ~ 19

Author(s):

Clive E. Davies ◽

Alison Carroll ◽

Rory Flemmer

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Pressure Fluctuations ◽

Size Monitoring

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A Fast and Improved Tunable Aggregation Model for Stochastic Simulation of Spray Fluidized Bed Agglomeration

Energies ◽

10.3390/en14217221 ◽

2021 ◽

Vol 14 (21) ◽

pp. 7221

Author(s):

Abhinandan Kumar Singh ◽

Evangelos Tsotsas

Keyword(s):

Fluidized Bed ◽

Growth Process ◽

Particle Growth ◽

Mean Value ◽

Operating Conditions ◽

Morphological Properties ◽

Gas Temperature ◽

Aggregation Model ◽

Primary Particles ◽

Bed Agglomeration

Agglomeration in spray fluidized bed (SFB) is a particle growth process that improves powder properties in the chemical, pharmaceutical, and food industries. In order to analyze the underlying mechanisms behind the generation of SFB agglomerates, modeling of the growth process is essential. Morphology plays an imperative role in understanding product behavior. In the present work, the sequential tunable algorithm developed in previous studies to generate monodisperse SFB agglomerates is improved and extended to polydisperse primary particles. The improved algorithm can completely retain the given input fractal properties (fractal dimension and prefactor) for polydisperse agglomerates (with normally distributed radii of primary particles having a standard deviation of 10% from the mean value). Other morphological properties strongly agreed with the experimental SFB agglomerates. Furthermore, this tunable aggregation model is integrated into the Monte Carlo (MC) simulation. The kinetics of the overall agglomeration at various operating conditions, like binder concentration and inlet fluidized gas temperature, are investigated. The present model accurately predicts the morphological descriptors of SFB agglomerates and the overall kinetics under various operating parameters.

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