Fluid-dynamics evaluation in a conical spouted bed and characterization of foxtail millet seeds

Nascimento, Lidiane Diniz do; Corumbá, Lorena Gomes; Rocha, Sandra Cristina dos Santos; Taranto, Osvaldir Pereira; Costa, Cristiane Maria Leal; Faria, Lênio José Guerreiro de

doi:10.1016/j.partic.2015.01.009

Cited by 10 publications

(8 citation statements)

References 22 publications

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“…The same deviations were reported only in the 1.59-kg load for both equations (5) and (6), suggesting that the processing/fluid dynamics of flaxseed in the spouting bed is best conducted in that seed load. NASCIMENTO et al (2015) observed a similar behavior in the fluid-dynamic behavior of millet seeds.…”

Section: Analysis Of Fluid-dynamic Behaviorsupporting

confidence: 61%

“…The processing of particulates in moving beds has been used for seed coating (COSTA et al, 2010) in order to create a barrier against fungi proliferation (GORIM & ASCH, 2012). It has been used for drying pulp to produce powdered fruits (ROCHA et al, 2011), and for studying the fluid-dynamic behavior applied to seed treatment in these beds (NASCIMENTO et al, 2015). It showed the importance of the characteristic parameters of beds in order to learn about the fluiddynamic behavior and, hence, to identify the ideal conditions for processing and mixture of particulates.…”

Section: Introductionmentioning

confidence: 99%

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Fluid-dynamic behavior of flaxseed fluidized and spouted bed

et al. 2017

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Processing of particles in a moving bed, such as a fluidized bed or a spouting bed, is commonly used in the operations of drying, coating, and granulation of particulate systems. This process has applications in the chemical, pharmaceutical and, presently, agronomical industries, especially for seed treatment/coating. This research aimed to analyze the fluid-dynamic behavior of fluidized and spouting beds with different air temperatures and loads of flaxseeds (Linum usitatissimum L.), with estimates of the fluid-dynamic parameters correlated to each process. The parameters were compared with the values obtained from classical correlations in the literature, with indications of associated percentages of deviation. Influence of fluid dynamics on the physiological quality of seeds was assessed by germination tests and the germination speed index. An analysis of the results indicated that seed processing was adequate for processing in dynamically active beds; however, temperatures above 50ºC in both beds caused significant reductions in the physiological quality of the seeds. Processing in a fluidized bed presented a smaller reduction of the physiological properties of the flaxseed.

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Section: Analysis Of Fluid-dynamic Behaviorsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Fluid-dynamic behavior of flaxseed fluidized and spouted bed

et al. 2017

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“…The experimental drying curves were fitted using the empirical and semi empirical models shown in Table 3. Hacihafizoglu et al [3], who modelled the thin-layer drying of rice, Nascimento et al [4], who modelled the drying curves of seeds in a spouted bed, Doymaz et al [6], who studied the effect of infrared power on drying kinetics of green bean, and several others [7][8][9][10][11]17], conducted similar studies.…”

Section: Mathematical Modellingmentioning

confidence: 99%

“…Under these circumstances, the moisture is bound internally in the particle and moves up to the surface, where the moisture content is in equilibrium with the hot air. Many empirical and semi-empirical models have been applied in particulate thin-layer drying studies to describe the falling rate period, in which the moisture transport is controlled by internal conditions [3][4][5][6][7][8][9][10][11][12]. Most of them are derived from Fick's second law or from modifications of its simplified forms [13].…”

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confidence: 99%

“…Kucuck et al [13] presented a comprehensive review of thin-layer drying models available in the literature. Based on the assessment they carried out, Page and Modified Page [8][9][10][11][13][14][15][16], two-term [3,8,11,16], Henderson and Pabis [5--9,11,16], Midilli et al [3,4,6,8,11,16], Verma et al [3,6,8,11,16,17] and Aghbashlo et al [6][7][8]11] are among the ones that offer better results.…”

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confidence: 99%

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Monoammonium phosphate (MAP) fertilizer drying kinetics in tray dryer

Covello

Nitz

2018

CI&CEQ

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The drying behaviour of monoammonium phosphate fertilizer was examined in a static tray dryer, establishing kinetic parameters that may be used to improve the design of dryers. Drying temperatures ranged from 80 to 95 °C, and surface air velocity was 0.50 m/s. The material was previously separated into two particle sizes, between 1.40 and 2.38 mm mean diameter. Drying curves were analysed qualitatively and seven empirical kinetic thin-layer models were fitted. The drying kinetic showed to be temperature-dependent: a moisture ratio reduction of 90% was achieved twice as fast at 95 °C than at 80 °C. On the other hand, particle size did not exert significant influence on the drying rate. The results showed a decreasing drying rate throughout the whole process. All studied models adjusted well to the experimental data: R 2 values were all above 0.999. The two-term model generated the lowest RMSE and χ 2 values, between 0.00621 and 0.010743 and between 0.000044 and 0.000115, respectively.

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