Adsorption of α‐amylase in a fixed bed: Operating efficiency and kinetic modeling

Bautista, Luis Fernando; Martı́nez, Mercedes; Aracil, José

doi:10.1002/aic.690491016

Cited by 25 publications

(14 citation statements)

References 30 publications

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“…The fixed bed process parameters, breakthrough time, total percentage removal of Cr(VI), adsorption exhaustion rate and fraction of unused bed were obtained. A mathematical model for fixed bed adsorption was proposed by incorporating the effect of velocity variation along the bed length in the Bautista et al [108] model. The proposed model was successfully validated with the literature data and the experimental data obtained.…”

Section: Sawdustmentioning

confidence: 46%

Cr(VI) and Cr(III) removal from aqueous solution by raw and modified lignocellulosic materials: A review

Miretzky

Cirelli

2010

Journal of Hazardous Materials

861

341

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Section: Sawdustmentioning

confidence: 46%

Cr(VI) and Cr(III) removal from aqueous solution by raw and modified lignocellulosic materials: A review

Miretzky

Cirelli

2010

Journal of Hazardous Materials

861

341

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“…Pore diffusion model has been used for predicting the kinetics of fixed bed adsorption process [6,9,10,11]. These models take account of both external and internal masstransfer resistances as well as of nonideal plug flow along the column.…”

Section: Introductionmentioning

confidence: 99%

Modeling And Simulation Of Fixed Bed Adsorption Column: Effect Of Velocity Variation

Babu¹,

Gupta²

2005

JFET

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The kinetic behavior of a fixed-bed adsorber can be explained and the characteristic breakthrough curve of the adsorption phenomena can be obtained through mathematical models. In the earlier models, the kinetics is explained using a mathematical model that takes into account of external and internal masstransfer resistances with a nonideal plug flow behavior. The variation of fluid velocity along the column is an important aspect, which has not been accounted so far. In the present study, a mathematical model is proposed for explaining the kinetic behavior of adsorption phenomena incorporating the fluid velocity variation along the column length also. Internal mass-transfer resistances due to pore diffusion mechanism are considered in the model. The proposed mathematical model for fixed-bed adsorption is solved numerically and compared with earlier model reported in literature. The results show that the breakpoint is obtained earlier which represents the realistic behavior in adsorption phenomena. Initially the sharp front of the breakthrough curve is seen followed by broadening of tail of the breakthrough curve. Simulations are carried out using the present model for a systematic parametric study. The effects of various important and influencing parameters such as flow rate, bed height, inlet adsorbate concentration and particle diameter on breakthrough curve are studied in detail.

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“…Adsorptive separations have found widespread use in the purification of antibiotics and other small molecules because of their high separation selectivity and low energy consumption compared to operations such as distillation or solvent extraction from dilute aqueous solutions [1][2][3][4][5][6][7][8][9][10]. Since the first ion exchanger specifically designed for erythromycin (EM) was introduced in 1962 [5], a number of studies have explored the kinetics of EM adsorption on ion-exchange and macroporous resins [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 46%

Mass transfer mechanisms in fixed-bed adsorption of erythromycin

Sun

Zhu

Chen

et al. 2008

Front. Chem. Eng. China

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The equilibrium and kinetic characteristics of the adsorption of erythromycin to Sepabeads SP825 were determined. The equilibrium data in a batch system was well described by a Langmuir isotherm. The separation performance was investigated in a fixed-bed system with respect to the adsorption superficial velocity, ionic strength and pH. A mathematical model was used to simulate the mass transfer mechanism, taking film mass transfer, pore diffusion and axial dispersion into account. The model predictions were consistent with the experimental data and were consequently used to determine the mass transfer coefficients.

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Adsorption of α‐amylase in a fixed bed: Operating efficiency and kinetic modeling

Abstract: Kinetic studies on the adsorption of ␣ -amylase from Aspergillus oryzae on the anion

Cited by 25 publications

References 30 publications

Cr(VI) and Cr(III) removal from aqueous solution by raw and modified lignocellulosic materials: A review

Cr(VI) and Cr(III) removal from aqueous solution by raw and modified lignocellulosic materials: A review

Modeling And Simulation Of Fixed Bed Adsorption Column: Effect Of Velocity Variation

Mass transfer mechanisms in fixed-bed adsorption of erythromycin

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