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Frequency Response of Continuous-Flow Adsorber for Multicomponent System
School of Fine Chemistry and Chemical Engineering, Kyungnam University, 449, Wolyoung-dong, Masan 631-701, Korea
Korean Journal of Chemical Engineering, November 2000, 17(6), 704-711(8), 10.1007/BF02699121
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Abstract
In this paper, we present a theoretical analysis of the frequency response of a continuous-flow adsorber with periodic modulation of the inter flow-rate to measure multicomponent diffusion kinetics in porous media. Micropore diffusion kinetics is assumed for the intraparticle mass transfer mechanism and three different shapes of microparticle are considered: slab, cylinder, and sphere. Simulation results for a binary system show that the frequency response of the faster diffusing component is strongly influenced by the slower component The out-of-phase characteristic function of the frequency response of the faster diffusing component shows maximum and minimum points. The deviation between these maximum and minimum values becomes smaller when the cross-terms of diffusivity go to zero, while the deviation becomes larger when the cross-terms of the adsorption equilibrium constant go to zero. Contrary to the behaviour of the out-of-phase function of the faster diffusing component, the out-of-phase function of the slower diffusing component shows no extrema at all. The in-phase characteristic function of the frequency response of the continuous-flow adsorber is not affected by the overflow parameter.
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Jordi RG, Do DD, J. Chem. Soc.-Faraday Trans., 88, 2411 (1992)
Markovska LT, Meshko VD, Kiprijanova RT, Korean J. Chem. Eng., 16(3), 285 (1999)
Ngai S, Gomes VG, Ind. Eng. Chem. Res., 35(4), 1475 (1996)
Park IS, Do DD, Rodrigues AE, Catal. Rev.-Sci. Eng., 38(2), 189 (1996)
Park IS, Petkovska M, Do DD, Chem. Eng. Sci., 53(4), 819 (1998)
Park IS, Petkovska M, Do DD, Chem. Eng. Sci., 53(4), 833 (1998)
Petkovska M, Do DD, Chem. Eng. Sci., 53(17), 3081 (1998)
Qureshi WR, Wei J, J. Catal., 126, 147 (1990)
Sun LM, Bourdin V, Chem. Eng. Sci., 48, 3783 (1993)
Sun LM, Do DD, J. Chem. Soc.-Faraday Trans., 91, 1695 (1995)
Sun LM, Do DD, Adsorption, 2, 265 (1996)
Sun LM, Meunier F, Karger J, Chem. Eng. Sci., 48, 715 (1993)
Sun LM, Zhong GM, Gray PG, Meunier F, J. Chem. Soc.-Faraday Trans., 90, 369 (1994)
Yasuda Y, Matsumoto K, J. Phys. Chem., 93, 3195 (1989)
Yasuda Y, Saeki M, J. Phys. Chem., 82, 74 (1978)
Yasuda Y, Sugasawa G, J. Catal., 88, 530 (1984)
Yasuda Y, J. Phys. Chem., 86, 1913 (1982)
Yasuda Y, J. Phys. Chem., 93, 7185 (1989)
Yasuda Y, J. Phys. Chem., 97, 3314 (1993)
Yasuda Y, Iwai K, Takakura K, J. Phys. Chem., 99(51), 17852 (1995)
