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

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.

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 ◽  
...  

2008 ◽  
Vol 2 (4) ◽  
pp. 353-360 ◽  
Author(s):  
Ying Sun ◽  
Jiawen Zhu ◽  
Kui Chen ◽  
Sheng Zhu ◽  
Jie Xu

2020 ◽  
Vol 36 ◽  
pp. 101303 ◽  
Author(s):  
V. Díaz-Blancas ◽  
C.G. Aguilar-Madera ◽  
J.V. Flores-Cano ◽  
R. Leyva-Ramos ◽  
E. Padilla-Ortega ◽  
...  

2015 ◽  
Vol 13 (3) ◽  
pp. 790-800 ◽  
Author(s):  
Zahra Saadi ◽  
Reyhaneh Saadi ◽  
Reza Fazaeli

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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