Experimental methods and correlation of solid—liquid mass transfer in fluidized beds

Arters, David C.; Fan, Liang‐Shih

doi:10.1016/0009-2509(90)85019-a

Cited by 31 publications

(14 citation statements)

References 17 publications

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“…These observations are in agreement with those of Morooka et al [4] and Yasunishi et al [5] in their studies on wall-to-bed mass transfer. The particleto-liquid mass transfer data of Arters and Fan [17] also showed similar trend.…”

Section: Effect Of Gas Velocity On K Lsupporting

confidence: 77%

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Ramesh

Raju

Sarma

et al. 2008

Chemical Engineering Journal

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Section: Effect Of Gas Velocity On K Lsupporting

confidence: 77%

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Ramesh

Raju

Sarma

et al. 2008

Chemical Engineering Journal

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“…3 the data of Nikov and Delmas (1987) on mass transfer in conventional liquid-solid fluidized bed with a similar difference of densities between the liquid and solid phases (Ap = 315 kg/ kg/m3). The particle diameter was 10 mm; as already known, however, this parameter has no effect on the mass transfer rate in classical fluidized beds (Nikov and Delmas, 1987;Arters and Fan, 1990). Mass transfer was determined by the same method as in this work.…”

Section: Resultsmentioning

confidence: 98%

Liquid‐solid mass transfer in inverse fluidized bed

Nikov

Karamanev

1991

AIChE Journal

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Conventional fluidized beds, used widely in practice and studied intensively in the last few decades, have the following common characteristics. The solid particles have higher density than those of the fluidizing liquid and/or gas, and the bed is expanded by the upward flow of the continuous fluid. A new mode of three-phase fluidization proposed has the solid phase with a density lower than that of the downward-flow continuous liquid phase. It is called "three-phase inverse fluidization."There are only a few publications concerning three-phase inverse fluidization (Werner and Schugerl, 1980; Fan et al., 1982a,b). Only the hydrodynamics of this new process has been studied so far. There is no information available yet concerning mass transfer between the solid and liquid phases in the inverse fluidized beds (Muroyama and Fan, 1985). Some differences in mass transfer between inverse fluidization and classic fluidization are due primarily to the different directions of the gas and liquid and the different inertial effects of the particles. The particles in the inverse fluidized bed have smaller mass and smaller inertia than those used in the upflow bed.The mass transfer rate as a function of the parameters of the fluidized bed is given usually by the following correlations:Sherwood (Sh) and Schmidt (Sc), Galileo (Ga), density (Mu) and Reynolds (Re) numbers. A good review on the mass transfer correlation for classical liquid fluidized beds is presented by Tournie et al. (1977). In our view, the most general and precise correlations are those proposed by Calderbank (1967) based on the experimental data of dissolution of solid particles and those derived originally for the description of slurry reactors and applied by Lee et al. (1974) to fluidized beds.and the correlation of Tournie et al. (1977): One of the most effective methods for determining the mass transfer between fluidized solid particles and liquid is the electromechanical method (Berger and Ziai, 1983; Nikov and Delmass, 1987). It is based on the diffusion-controlled cathode reduction of ferricyanide ions on a fixed sphere. The mass transfer rate can be determined by the current intensity from the liquid to the electrode. Using the data obtained by this method, the following correlation for the liquid-solid mass transfer was proposed by Nikov and Delmas (1987):The accuracy and applicability of this equation in classical liquid-solid fluidized beds were pointed out recently by Arters and Fan (1 990).Inverse fluidized beds are used as bioreactors when the support particles, on which microorganisms are fixed, have a density lower than that of the fermentation broth (usually around 1 Mg/m3). The inverse fluidized-bed biofilm reactor is up to 15 times more effective than the airlift apparatus (Nikolov and Karmanev, 1987) and allows for effective control of the biofilm thickness (Karamanev and Nikolov, 1988). Therefore, interest in the inverse fluidization has been growing. However, due to a lack of data on mass transfer in inverse fluidized beds, relations de...

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“…Several assumptions are generally made in determining the mass-transfer coefficient in liquid-solid or gasliquid-solid particle systems [16,17], including (i) the effect of an inclined gas-liquid interface is neglected; (ii) the concentration of the liquid at the particle surface is equal to the saturation concentration of the solution; (iii) the driving for interfacial mass transfer across the effective liquid film which surrounds a solid particle is the difference between the saturated solute concentration at the particle surface and the concentration in the bulk liquid, as shown in Eq (1); and (iv) solid distribution throughout the bed is uniform.…”

Section: Model Developmentmentioning

confidence: 99%

Process Intensification of Steel Slag Carbonation via a Rotating Packed Bed: Reaction Kinetics and Mass Transfer

et al. 2014

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The carbonation of alkaline wastes for CO2 capture was mainly controlled by the CO2 dissolution, i.e., mass-transfer controlled reaction, from the theoretical considerations. Several approaches to enhancing the CO2 dissolution rate were proposed and investigated in the literature. For instance, it was proven that the rate of carbonation reaction for alkaline waste was effectively increase mass transfer rate if a rotating packed bed (RPB), so-called "high-gravity" or "HIGEE" process, was utilized. In this study, the experimental data were utilized to develop the carbonation model in an RPB for carbonation of various types of alkaline wastes such as basic oxygen furnace slag (BOFS) and coldrolling mill wastewater (CRW). The effect of different operating parameters including operation modulus and rotating speed on CO2 removal efficiency was evaluated. In addition, the overall volumetric gas-phase mass transfer coefficients (KGa) of BOFS/CRW carbonation in the RPB were calculated. Furthermore, according to the SEM observations, the alkaline wastes were found to be successfully carbonated with CO2 in an RPB, where calcite (CaCO3) was identified as the main product. It was thus concluded that accelerated carbonation of alkaline wastes using an RPB is an effective and efficient method for CO2 capture due to its higher mass transfer rate and carbonation conversion.

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Experimental methods and correlation of solid—liquid mass transfer in fluidized beds

Cited by 31 publications

References 17 publications

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Liquid‐solid mass transfer in inverse fluidized bed

Process Intensification of Steel Slag Carbonation via a Rotating Packed Bed: Reaction Kinetics and Mass Transfer

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