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Modelling of Microporous Diffusion of N-Paraffins in Zeolite 5A
Faculty of Technology and Metallurgy, University “St.Cyril and Methodius, Skopje, Republic of Macedonia
lile@ereb.mf.ukim.edu.mk
Korean Journal of Chemical Engineering, May 1999, 16(3), 285-291(7), 10.1007/BF02707114
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Abstract
Sorptive liquid-phase diffusion of two n-paraffins, C10H22 and C11H24, dissolved in isooctane, onto micropore of 5A zeolite was studied to assess multicomponent diffusion and competitive effects. Diffusion coefficients for adsorbing components are determined from experimental batch reactor data. The experimental data indicate that diffusion through the microporous zeolite crystals is the primary diffusional resistance. A mathematical model of the rate of adsorption of a solute from a liquid by micropore adsorbent in a batch system was developed. The equation describing the mass transport by diffusion in a micropore adsorbent has been solved in order to obtain theoretical uptake curves for systems when the adsorption equilibrium isotherm is the favourable and nonlinear one. A computer simulation of the microporous diffusion is performed by use of the ISIM-Interactive Simulation Language. The effect of main term and cross-term coefficients of micropore diffusion for the system considered is investigated.
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Yon CM, Turnock, AIChE Symp. Ser., 67, 117 (1971)
Fritz W, Merk W, Schlunder EU, Chem. Eng. Sci., 36, 731 (1981)
Hulme R, Rosensweig RE, Ruthven DM, Ind. Eng. Chem. Res., 30, 752 (1991)
ISIM-Interactive Simulation Language, User Manual, Fourth Ed., ChemEng Software Ltd., Beaminster, UK (1986)
Jakimova AV, Astahov VA, Lukin VD, Z. Prikl. Him., 56(7) (1983)
Klein G, "Column Design for Sorption Processes," NATO ASI Ser., Ser. E 71, 213 (1983)
Kiprijanova R, Markovska L, "Experimental Design and Analysis," Scientific Series of the International Bureau, Forschungszentrum Julich GmbH, Julich, 9 (1993)
Lee SY, Seader JD, Tsai CH, Massoth FE, Chem. Eng. Sci., 48, 595 (1993)
Lin SH, Hsu FM, Ind. Eng. Chem. Res., 34(6), 2110 (1995)
McKay G, McKee S, Walters HRJ, Chem. Eng. Sci., 42, 1145 (1987)
Meshko V, Ph.D. Thesis, "Adsorption of n-Paraffins on Molecular Sieve 5A in Fixed Bed Column," University St. Cyril and Methodius, Skopje, 57 (1990)
Moon H, Lee WK, J. Colloid Interface Sci., 96, 162 (1983)
Palenkar MG, Rajadhyaksha RA, Chem. Eng. Sci., 40, 1085 (1985)
Periasamy K, Namasivayam C, Ind. Eng. Chem. Res., 33(2), 317 (1994)
Poposka FA, Grizo AN, Meshko VD, J. Serb. Chem. Soc., 55(7), 407 (1990)
Post MFM, "Introduction to Zeolite Science and Practice," Eds.Van Bekkum, H., Flanigen, E.M. and Jansen, J.C., Elsevier, Amsterdam, 392 (1991)
REPROCHE-Regression Program for Chemical Engineers, User Manual, Version 5.0, ChemEng Software and Services Ltd., Beaminster, UK (1992)
Robinson SM, Arnold WD, Byers CH, AIChE J., 40(12), 2045 (1994)
Ruthven DM, "Principles of Adsorption and Adsorption Processes," John Wiley and Sons, New York, 166 (1984)
Weber WJ, J. Funadam. Adsorpt. Proc. Eng. Faund. Conf., 679 (1983)
Yon CM, Turnock, AIChE Symp. Ser., 67, 117 (1971)
