Experimental study of fluidized bed agglomeration of acerola powder

The aim of this work was to study the main effects of acerola powder on fluidized bed agglomeration. A 2(4-1) fractional factoring design was used to evaluate the main operating conditions (fluidizing air temperature, fluidizing air velocity, atomizing air flow and height of nozzle in the bed). The mechanical and physicochemical product changes were determined by analysis of particle diameter, moisture content, wetting time and bed porosity. The particle enlargement by agglomeration occurred when the relative humidity in the bed increased and, thus, the moisture of the product increased. However, the excessive increase in relative humidity resulted in a decrease in yield, caused by caking and product incrustation. The consolidation of small granules resulted in an increase in the instant properties, decreasing the wetting time and increasing the solubility in a short period of agitation.251515

Experimental study and optimization of the agglomeration of acerola powder in a conical fluid bed

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The aim of this work was to study the physical property modifications of acerola powder produced by a wet-agglomeration process in a fluid bed, A 2(2) full experimental design was used to evaluate The influence of the main operational conditions and to optimize the agglomeration process. The product transformations were determined by an analysis of the particle diameter, size distribution, morphology, moisture content and solubility. The agglomeration of small granules results in an increase in the instant properties, increasing particle solubility. (c) 2008 Elsevier B.V. All rights reserved.1883187194The National Counsel of Technological and Scientific DevelopmentConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Effect of operational conditions on the properties of pectin powder agglomerated in pulsed fluid bed

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)The agglomeration process enlarges particles and decreases the quantity of fine particles, leading to benefits such as lower rates of particle elutriation and reduced risks related to particle handling and inhalation. The pulsed fluid bed has some advantages over the conventional fluid bed equipment, including the improvement on fluidization of irregular particles of different sizes. The aim of this work was to study the agglomeration of pectin in pulsed fluidized bed and evaluate the physical properties of the agglomerated powder in relation to those of the raw material. The following variables were assessed: fluidizing air temperature, binder flow rate, fluidizing air velocity, and air pulsation frequency. Yields higher than 80% were achieved. There was an increase of almost 340% in the mean particle diameter. Compared with the raw material, which is more compact and circular, the agglomerated powder was more porous and irregular, and it presented improved appearance, flowability, wettability, and dissolution. The stress at fracture and the modulus of elasticity of the gel formed from the agglomerated product were higher compared with the gel obtained from the raw material showing enhanced properties as gelling and thickening agent. (C) 2013 Elsevier B.V. All rights reserved.245174181Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES

Fluid dynamics and morphological characterization of soy protein isolate particles obtained by agglomeration in pulsed-fluid bed

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The aim of this work was to study the fluid dynamics profiles of cohesive soy protein isolate powders at several air pulsation frequencies in a pulsed-fluid bed. Additionally, the physical property modifications of soy protein isolate powder produced by a wet-agglomeration process were also evaluated. During agglomeration, the raw particles coalesce, resulting in the formation of granules with increasing size, but morphological changes were also verified. The shape of the raw powder particles were circular and compact, while the agglomerated particles were wrinkled and showed lower circularity and tight solid bridges. The fluidization of spray-dried particles was enhanced with the pulsation system, resulting in higher fluid bed homogeneity and agglomerated products with narrow particle size distribution. (C) 2013 Elsevier B.V. All rights reserved.247222230Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq