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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received February 25, 2005
Accepted June 10, 2005

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Analysis of the Constant Molar Flow Semi-Batch Adsorber Loaded with Inert Core Adsorbents

In-Soo Park^†

Department of Energy and Chemical Engineering, Kyungnam University, Masan 631-701, Korea

Korean Journal of Chemical Engineering, September 2005, 22(5), 729-734(6), 10.1007/BF02705790

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Abstract

An analytical solution for a constant molar flow semi-batch adsorber loaded with inert core adsorbents is obtained for the linear isotherm coupled with intraparticle diffusion and external film diffusion. The solution obtained in this study consists of two parts. One is the asymptote, to which the bulk concentration approaches as time is sufficiently large. The other is the relaxation term, which dictates how the mass in the bulk phase flows into the adsorbent within the adsorption vessel. For a given value of the inert core radius, the slope of the asymptote is a function of the equilibrium parameter only and the intercept is a function of the kinetic parameter as well as the equilibrium parameter. The intercept of the asymptote consists of two parts. One is the contribution due to the external film resistance; the other is the contribution due to the intraparticle diffusion resistance. Hence, we can obtain the information of the equilibrium constant, the film mass transfer coefficient, and the effective diffusivity from the asymptote of the solution presented in this study.

Keywords

Constant Molar Flow Inert Core Adsorbent Semi-Batch Adsorber Porous Media Effective Diffusivity

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