scholarly journals Numerical Simulation of Multicomponent Isobaric Adsorption in Fixed Bed Columns

1986 ◽  
Vol 3 (2) ◽  
pp. 49-59 ◽  
Author(s):  
I. Roušar ◽  
P. Ditl
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Fixed Bed ◽  
Intraparticle Diffusion ◽  
Axial Dispersion ◽  
Particle Mass ◽  
External Particle ◽  
Conservative Scheme ◽  
Transfer Mechanisms ◽  
Dynamic Criteria

A model has been formulated for multicomponent isobaric adsorption in fixed bed columns. The following mass transfer mechanisms were used: convective flow, axial dispersion, external particle mass transfer and intraparticle diffusion. Analysis was applied on the system of governing equations to obtain controlling dimensionless criteria for the fixed bed adsorber. The derived criteria can be divided into three groups, namely: main dynamic criteria, equilibrium criteria and multicomponent dynamic criteria, their physical meaning has been discussed. The system of equations has been numerically solved using a finite difference method with an implicit conservative scheme. On the basis of this model a numerical simulation has been made to determine the influence of external particle mass transfer, axial dispersion, intraparticle diffusion and adsorption equilibrium on adsorber dynamics.

A mass transfer model for the fixed-bed adsorption of ferulic acid onto a polymeric resin: axial dispersion and intraparticle diffusion

2016 ◽  
Vol 37 (15) ◽  
pp. 1914-1922 ◽  
Author(s):  
Nancy E. Davila-Guzman ◽  
Felipe J. Cerino-Córdova ◽  
Eduardo Soto-Regalado ◽  
Margarita Loredo-Cancino ◽  
José A. Loredo-Medrano ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Ferulic Acid ◽  
Fixed Bed ◽  
Intraparticle Diffusion ◽  
Axial Dispersion ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
Polymeric Resin ◽  
Fixed Bed Adsorption

Mass transfer mechanisms in fixed-bed adsorption of erythromycin

2008 ◽  
Vol 2 (4) ◽  
pp. 353-360 ◽  
Author(s):  
Ying Sun ◽  
Jiawen Zhu ◽  
Kui Chen ◽  
Sheng Zhu ◽  
Jie Xu
Keyword(s):  
Mass Transfer ◽  
Fixed Bed ◽  
Fixed Bed Adsorption ◽  
Transfer Mechanisms

Evaluation of mass transfer mechanisms involved during the adsorption of metronidazole on granular activated carbon in fixed bed column

2020 ◽  
Vol 36 ◽  
pp. 101303 ◽  
Author(s):  
V. Díaz-Blancas ◽  
C.G. Aguilar-Madera ◽  
J.V. Flores-Cano ◽  
R. Leyva-Ramos ◽  
E. Padilla-Ortega ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Fixed Bed Column ◽  
Transfer Mechanisms

scholarly journals Dynamics of Pb(II) adsorption on nanostructured γ-alumina: calculations of axial dispersion and overall mass transfer coefficients in the fixed-bed column

2015 ◽  
Vol 13 (3) ◽  
pp. 790-800 ◽  
Author(s):  
Zahra Saadi ◽  
Reyhaneh Saadi ◽  
Reza Fazaeli
Keyword(s):  
Experimental Data ◽  
Mass Transfer ◽  
Fixed Bed ◽  
Solution Concentration ◽  
Axial Dispersion ◽  
Maximum Adsorption Capacity ◽  
Transfer Coefficients ◽  
Axial Dispersion Coefficient ◽  
Removal Of Metal Ions ◽  
Ph Level

In the present study, the removal of metal ions Pb(II) using nanostructured γ-alumina was investigated by tests on batch operations and fixed-bed columns. Optimization was determined for factors effective on adsorption such as pH, contact time of metal solution with adsorbent and initial solution concentration. The optimum pH level was determined at 4.5 and the maximum adsorption percentage was achieved at 150 minutes. pHpzc was measured 8.3 for nanostructured γ-Al2O3. The Langmuir, Freundlich and Temkin isotherms were used to analyze the experimental data. The Langmuir isotherm model showed the best agreement with the experimental data. The model showed evaluations for maximum adsorption capacity of adsorbent at 119.04 mg/g and adsorbent bed performance for different flow rates, bed heights and influent concentrations were also investigated. The lumped method was used to solve the bed equations, to predict the breakthrough curve and model overall mass transfer coefficient (Koverall) and axial dispersion coefficient (Dz) parameters to make comparisons with experimental results.

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