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

B.V. Babu*, Suresh Gupta**
*Assistant DeanESD & Head of Chemical Engineering Department B.I.T.S., PILANI-333031 (Rajasthan) INDIA.
**Department of Chemical Engineering, Birla Institute of Technology & Science,Pilani 333031 (Rajasthan) India
Periodicity:August - October'2005


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 mass-transfer 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.


Adsorption, Modeling, Pore Diffusion Control, Breakthrough Curve, Mass Transfer.

How to Cite this Article?

B.V. Babu and Suresh Gupta (2006). Modeling And Simulation Of Fixed Bed Adsorption Column: Effect Of Velocity Variation. i-manager’s Journal on Future Engineering and Technology, 1(1), 60-66.


[1].B.V. Babu, S. Gupta, "Modeling and Simulation for Dynamics of Packed Bed Adsorption", Proceedings of International Symposium & 57th Annual Session ofllChE in association with AlChE (CHEMCON-2004), Mumbai, December27-30,2004.
[2].D.M. Ruthven, and C.B. Ching, "Counter-current and simulated counter-current adsorption separation processes". Chemical Engineering Science, 44 (1989) 1011-1038.
[3].G. Ganetsos, P.E. Barker, "Preparative and Production Scale Chromatography", MarcelDekker, NewYork, 1993.
[4].K. Kaczmarski, M. Mazzotti, G. Storti, M. Morbidelli, "Modeling fixed-bed adsorption columns through orthogonal collocations on moving finite elements". Computers and Chemical Engineering, 21 (1997) 641¬660.
[5].B.V. Babu, V. Ramakrishna, "Dominant Design Variables and Modeling Parameters for Adsorption in Batch Studies", Proceedings of International Symposium & 57th Annual Session of IIChE in association with AlChE (CHEMCON-2004), Mumbai, December27-30,2004.
[6].Z. Ma, R.D. Whitley, N.H.L. Wang, "Pore and Surface Diffusion in Multicomponent Adsorption and Liquid Chromatography Systems", AlChE Journal, 42 (1996) 1244-1262.
[7]T.W. Webi, R.K. Chakravort, "Pore and Solid Diffusion Models forFixed-BedAdsorbers", AlChE Journal, 20(1974)228-238.
[8]E. Furuya, Y.Takeuchi, K.E. Noll, "Intraparticle Diffusion of phenols within Bidispersed Macroreticular Resin Particles", J. Chem. Eng. Japan, 22(1989) 670- E. Furuya
[9]Y.Takeuchi, K.E. Noll, "Intraparticle Diffusion of phenols within Bidispersed Macroreticular Resin Particles", J. Chem. Eng. Japan, 22(1989) 670- L.F. Bautista, M. Martinez, J. Aracil, "Adsorption of ?-Amylase in a Fixed Bed: Operating Efficiency and Kinetic Modeling", AlChE Journal, 49(2003) 2631-2641.
[10].S. Ghorai, K.K. Pant, "Investigations on the column performance of fluoride adsorption by activated alumina in a fixed-bed". Chemical Engineering Journal, 98(2004)165-173.
[11]J.L. Sotelo, M.A. Uguina, J.A. Delgado, L.l. Celemin, "Adsorption of methyl ethyl ketone and trichloroethane from aqueous solutions onto activated carbon fixed-bed adsorbers". Separation and Purification Technology, 37 (2004) 149-160.B.V. Babu, A.S. Chaurasia, "Modeling, Simulation, and Estimation of Optimum Parameters in Pyrolysis of Biomass", Energy Conversion and Management, 44 (2003)2135-2158.
[12].B.V. Babu, A.S. Chaurasia, "Modeling for Pyrolysis of Solid Particle: Kinetics and Heat Transfer Effects", Energy Conversion and Management, 44(2003) 2251-2275.
[13].B.V. Babu, A.S. Chaurasia, "Parametric Study of Thermal and Thermodynamic Properties on Pyrolysis of Biomass in Thermally Thick Regime", Energy Conversion and Management, 45(2004)53-72.
[14].B.V. Babu, A.S. Chaurasia, "DominantDesign Variables in Pyrolysis of Biomass Particles of Different Geometries in Thermally Thick Regime", Chemical Engineering Science, 59(2004)611-622.
[15].B.V. Babu, A.S. Chaurasia, "Pyrolysis of Biomass: Improved Models for Simultaneous Kinetics & Transport of Heat, Mass, and Momentum", Energy Conversion and Management, 45(2004) 1297-1327.
[16].B.V. Babu, A.S. Chaurasia, "Heat Transfer and Kinetics in the Pyrolysis of Shrinking Biomass Particle", Chemical Engineering Science, 59(2004) 1999-2012.
[17].D.M. Ruthven, "Principles of Adsorption and Adsorption Processes", John Wiley &Sons, New York, 1984.
If you have access to this article please login to view the article or kindly login to purchase the article

Purchase Instant Access

Single Article

North Americas,UK,
Middle East,Europe
India Rest of world
Pdf 35 35 200 20
Online 35 35 200 15
Pdf & Online 35 35 400 25

Options for accessing this content:
  • If you would like institutional access to this content, please recommend the title to your librarian.
    Library Recommendation Form
  • If you already have i-manager's user account: Login above and proceed to purchase the article.
  • New Users: Please register, then proceed to purchase the article.