UTILIZATION OF THOMAS MODEL TO PREDICT THEBREAKTHROUGH CURVES FOR ADSORPTION AND IONEXCHANGE
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Abstract
Fixed bed sorption processes such as adsorption and ion exchange do not operate at
steady state. The design equations are differential that usually require numerical methods
to solve. Thomas gives a general analytical solution for these equations. It is based on
second-order reaction kinetics and the assumption of Langmuir isotherm. Computer
program for the solution of Thomas model was designed using MATLAB 7.0. Four sets
of experimental data are tested to show the capability of Thomas model to predict the
breakthrough curves for adsorption and ion exchange processes. These data represent the
sorption of o-cresol from water by activated carbon, acetic acid from air by activated
carbon, phenol from water by natural zeolite, and trichloroethylene from air by zeolite-
5A.The results show that there are a good agreement between the experimental data and
the model.
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References
-Basheer, I. A. and Najjar, Y. M., (1996), Predicting Dynamic Response of Adsorption
Columns with Neural Nets, Journal of Computing in Civil Engineering, 10, 31-39.
-Carman, P. C., and Haul, R. A. W., (1954), Measurement of Diffusion Coefficients,
Proc. Roy. Soc., 222, 109-117.
-Chu,M.A.,(2010), Fixed bed sorption: Setting the record straight on the Bohart-Adams
and Thomas models, Journal of Hazardous materials,177,1006-1012.
-Ebrahim, S. E., (2010). Modeling the Removal of Phenol by Natural Zeolite in
Batchand Continuous Adsorption Systems, , Journal of Babylon University, (article in
press, Vol. 19, No. 4).
-Foo, S. C., and Rice, R. G., (1979), Sorption Equilibria and Rate Studies on Resinous
Retardation Beads. 2. Rate Studies, Ind. Eng. Chem. Fundam, 18, 68-75.
- Forbes, S. L., and Underhill, D. W., (1986), Modeling adsorption bed behavior using
microcomputer, JAPCA, 36, 61.
-Han,R.,Wang,Y.,Yu,W., Shi,J.,Liu,H.,(2007), Biosorption of methylene blue from
aqueous solution by rice husk in a fixed-bed column Journal of Hazardous Materials ,141
, 713–718.
-Han,R., Wang,Y., Zou,W., Wang,Y.,and Shi,J.,(2007), Comparison of linear and
nonlinear analysis in estimating the Thomas model parameters for Methylene blue
adsorption onto natural zeolite in fixed bed column , Journal of Hazardous Materials,
, 331–335.
-Han,R., Zou,L., Zhao,Xu,F.,Li,Y.,and Wang,Y.,(2009), Removal of Methylene blue
from aqueous solution by chaff in batch mode, Chemical Engineering
Journal,149,123-131.
-Hiester, N. K., and Vermeulen, T., (1952), Saturation performance of ion-exchange and
adsorption columns, Chemical Engineering Progress, 48, 505- 516.
-Ibrahim, S.K., (1992), Removal of gaseous pollutants from air by adsorption method,
M.Sc. Thesis, University of Baghdad.
-Keinath, T. M., and Weber, W. J. Jr.,(1968), A predictive model for the design of fluidbed adsorber, Journal of Water Pollution Control Federation, 40, 741-765.
- Maghazachi, M. S. K., (1989), Removal of gaseous pollutants from air by adsorption
method, M.Sc. Thesis, University of Baghdad.
-McCabe, W. L., Smith, J. C. and Hariott, P., (2001), Unit Operation of Chemical
Engineering, 6th edition, McGraw-Hill, USA.
-Mustafa Y. A., (1992), Removal of pollutants from water by adsorption, M.Sc. thesis,
University of Baghdad.
-Scott, R. S. and Paul, V. R., (1987), Rate of Humic substance uptake during activated
carbon adsorption, J. Environmental Engineering, 113, 1333-1349.
-Sherwood, T. K., Pigford, R. L., and Wilke, C. R., (1975), Mass transfer, McGraw-Hill,
USA.
-Smith, J.M., (1988), Chemical engineering kinetics, McGraw-Hill, USA.
-Tan, H. K. S., (1980), Kinetics of fixed-bed sorption processes, Chemical Engineering
,117-119.
-Tan, H. K. S., (1984), Programs for fixed-bed sorption, Chemical Engineering, 91, 57-
-Thomas, H. C., (1944), Heterogeneous Ion Exchange in a Flowing System, Journal of
the American Chemical Society, 66, 1664-1666.
-Thomas, W. J., and Crittenden, B., (1998), Adsorption Technology and Design, Reed
Education and Professional Publishing Ltd., UK.
-Treybal, R. E., (1985) “Mass transfer operation”, McGraw Hill, New York.
-Vermeulen, T., Klein, G., and Hiester, N. K., in , (1973), Chemical Engineering Handbook, ed. R.H.
Perry and C.H. Chilton,C.H. 5th ed., section 16.
-Vijayaraghavan, K., and Yun, Y., S., (2008), Bacterial biosorbents and biosorption,
Biotechnology Advances, 26, 266–291.
-Wolborska, A., (1999), External film control of the fixed bed adsorption, Chemical
Engineering Journal, 73, 85-92.