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

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

Proceedings of 21th International Drying Symposium ◽

10.4995/ids2018.2018.7345 ◽

2018 ◽

Author(s):

Juliana G Rosa ◽

R. F. Nascimento ◽

K. Andreola ◽

O. P. Taranto

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Particle Growth ◽

Spatial Filter ◽

Important Food ◽

Process Yield ◽

Size Monitoring ◽

Acacia Gum ◽

Bed Agglomeration ◽

Drying Conditions

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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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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Preparation and Characterization of Alumina Nanoparticles in Deionized Water Using Laser Ablation Technique

Journal of Nanomaterials ◽

10.1155/2012/819403 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 66

Author(s):

Veeradate Piriyawong ◽

Voranuch Thongpool ◽

Piyapong Asanithi ◽

Pichet Limsuwan

Keyword(s):

Particle Size ◽

Laser Ablation ◽

Absorption Spectra ◽

Laser Energy ◽

Spherical Shape ◽

Deionized Water ◽

Alumina Nanoparticles ◽

X Ray Diffraction ◽

Sem Images ◽

Xrd Patterns

Al2O3nanoparticles were synthesized using laser ablation of an aluminum (Al) target in deionized water. Nd:YAG laser, emitted the light at a wavelength of 1064 nm, was used as a light source. The laser ablation was carried out at different energies of 1, 3, and 5 J. The structure of ablated Al particles suspended in deionized water was investigated using X-ray diffraction (XRD). The XRD patterns revealed that the ablated Al particles transformed intoγ-Al2O3. The morphology of nanoparticles was investigated by field emission scanning electron microscopy (FE-SEM). The FE-SEM images showed that most of the nanoparticles obtained from all the ablated laser energies have spherical shape with a particle size of less than 100 nm. Furthermore, it was observed that the particle size increased with increasing the laser energy. The absorption spectra of Al2O3nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 210 nmarising from the presence of Al2O3nanoparticles. The results on absorption spectra are in good agreement with those investigated by XRD which confirmed the formation of Al2O3nanoparticles during the laser ablation of Al target in deionized water.

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Nanometer Ammonium Perchlorate and Ammonium Nitrate Prepared with 2D Network Structure via Rapid Freezing Technology

Nanomaterials ◽

10.3390/nano9111605 ◽

2019 ◽

Vol 9 (11) ◽

pp. 1605 ◽

Cited By ~ 1

Author(s):

Yi Wang ◽

Xiaolan Song ◽

Fengsheng Li

Keyword(s):

Thermal Decomposition ◽

Particle Size ◽

Ammonium Nitrate ◽

Ammonium Perchlorate ◽

Infrared Spectrometry ◽

Scanning Calorimetry ◽

Sem Images ◽

Decomposition Products ◽

Xrd Patterns ◽

2D Network

Nanometer (nano) ammonium perchlorate (AP) and ammonium nitrate (AN) were prepared with 2D network structures by the ultra-low temperature spray method. Scanning electron microscopy (SEM), X-ray diffractometry (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis/infrared spectrometry (TG-IR) were employed to probe the micron structure, crystal phase, and thermal decomposition of nano AP and nano AN. SEM images revealed that the sizes of nano AP and AN were in the nanometer scale (<100 nm) in one dimension. XRD patterns showed that the crystal phases of nano AP and AN were in accordance with those of raw AP and raw AN, respectively. DSC traces indicated that the thermal decomposition process of AP depended on its particle size, while the thermolysis of AN was independent of the particle size of AN. TG-IR analyses illustrated that the decomposition products of nano AP were NO2, N2O, HCl and H2O, with a small amount of NOCl, and the main decomposition products of nano AN were N2O and H2O, with a small amount of NH3. The results of mechanical sensitivity tests indicated that nano AP was more sensitive than raw AP and both nano AN and raw AN were very insensitive to impact and friction stimuli.

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Effect of Various Types of Sugar Binder on the Physical Properties of Gum Powders Prepared via Fluidized-Bed Agglomeration

Foods ◽

10.3390/foods10061387 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1387

Author(s):

Donghyeon Lee ◽

Gyeongeon Min ◽

Wooseok Roh ◽

Byoungseung Yoo

Keyword(s):

Physical Properties ◽

Fluidized Bed ◽

Carboxymethyl Cellulose ◽

Guar Gum ◽

Morphological Characteristics ◽

Locust Bean Gum ◽

Sugar Solution ◽

Distribution Analysis ◽

Locust Bean ◽

Bed Agglomeration

Particle agglomeration of fine gum powders to improve their physical and morphological characteristics is of crucial importance. Changes in the physical properties of guar gum, locust bean gum, and carboxymethyl cellulose powders subjected to fluidized-bed agglomeration with various sugar types as the binder were examined. The agglomerates with sugar binders had much larger particles (D50) and higher porosity (ε) than the corresponding fine gum powders, as confirmed by particle-size-distribution analysis and scanning electron microscopy. In particular, the carboxymethyl cellulose agglomerate exhibited much higher D50 and ε values than the original fine gum powder, with sorbitol as the binder resulting in the highest D50 and ε values. Except for guar gum with sorbitol as the binder, the guar gum and locust bean gum agglomerates with the other sugar binders showed lower Carr index and Hausner ratio values (thus exhibiting better flowability and lower cohesiveness) than the original powders, whereas those of the carboxymethyl cellulose agglomerates were higher. These findings indicate that the physical and structural properties of gum powders can be greatly improved according to the type of gum and sugar solution used in the agglomeration process.

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Synthesis and Characterization of Flower-Sphere MoS2

Materials Science Forum ◽

10.4028/www.scientific.net/msf.695.429 ◽

2011 ◽

Vol 695 ◽

pp. 429-432 ◽

Cited By ~ 2

Author(s):

Jun Zhou ◽

Xin Zhe Lan ◽

Ping Ren ◽

Qiu Li Zhang ◽

Yong Hui Song ◽

...

Keyword(s):

Particle Size ◽

Hydrothermal Systems ◽

Molar Ratio ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Xrd Patterns ◽

Scanning Electron

The flower-sphere molybdenum disulfide has been synthesized by reaction of Na2MoO4 and CS(NH2)2 with NH2OH·HCl or H2C2O4 as reductant. The microstructure and chemical composition of the product were characterized by means of X-ray diffraction and scanning electron microscope. XRD patterns showed that the molar ratio of Mo to S had a great effect on the purity of the product. When the molar ratio of Mo to S was 1:5, the product was nearly pure MoS2. SEM images showed that the particle size increased as the molar ratio of Mo to S reduced. The MoS2 microspheres had rough surfaces and were constructed with sheet-like structures in the two systems. But the product from the system of NH2OH·HCl as reductant has the bigger particle size, clearer petal-sheets, coarser surface and weaker agglomeration than that from the system H2C2O4 as reductant. The possible chemical reactions in hydrothermal systems were preliminarily discussed.

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Micro-Suspensions vs Nano-Suspensions: Impact of Particle Size on the Properties of Feed Liquid during Fluidized-Bed Coating

10.26226/morressier.57d6b2bfd462b8028d88dd88 ◽

2016 ◽

Author(s):

Basel Arafat

Keyword(s):

Particle Size ◽

Fluidized Bed ◽

Fluidized Bed Coating

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Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

Revista de Chimie ◽

10.37358/rc.20.1.7804 ◽

2020 ◽

Vol 71 (1) ◽

pp. 1-12

Author(s):

Salman H. Abbas ◽

Younis M. Younis ◽

Mohammed K. Hussain ◽

Firas Hashim Kamar ◽

Gheorghe Nechifor ◽

...

Keyword(s):

Experimental Data ◽

Aqueous Solution ◽

Particle Size ◽

Adsorption Capacity ◽

Fluidized Bed ◽

Flow Rate ◽

Fungal Biomass ◽

Solution Flow Rate ◽

Maximum Adsorption Capacity ◽

Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

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