A Numerical Analysis of Surface Diffusion in a Binary Adsorbed Film

Round, G. F.; Habgood, H. W.; Newton, R. C.

doi:10.1080/01496396608049446

Cited by 39 publications

(15 citation statements)

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“…19, in combination with the Langmuir adsorption isotherm is often used for the description of the adsorption process (Habgood, 1958;Round et al, 1966;G r g e r and Biilow, 1975). For the counterexchange Coefficient 9 1 2 the empirical Vignes relation (Vignes, 1966) …”

Section: Two Special Casesmentioning

confidence: 98%

“…Using the Onsager formalism with a vanishing crosscoefficient L , , binary diffusion in zeolites has been investigated by Habgood (1958, Round et al (1966, and G r g e r and Biilow (1975). Yang et al (1991) also included the crosscoefficient L,, in the description of binary diffusion in zeolites based on the Onsager formalism.…”

mentioning

confidence: 99%

“…This has been done by Round et al (1966) and Yang et al (1991). Using the inverse method of sorption kinetics of multicomponent mixtures, Marutovsky and Bulow (1989), and references therein, are able to evaluate the multicomponent Fick diffusion coefficient matrix from uptake profiles.…”

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confidence: 99%

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Simulation of diffusion in zeolitic structures

Broeke¹

1995

AIChE Journal

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Section: Two Special Casesmentioning

confidence: 98%

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confidence: 99%

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Simulation of diffusion in zeolitic structures

Broeke¹

1995

AIChE Journal

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“…A further consequence of this effect is a fact that in the multi-component system the adsorbate streams combine with each other [24][25][26]. The diffusion stream of each of the adsorbates depends on the concentration gradient of all the adsorbates.…”

Section: Introductionmentioning

confidence: 98%

Adsorption dynamics of chlorinated hydrocarbons from multi-component aqueous solution onto activated carbon

Pełech

Milchert

Wróbel

2006

Journal of Hazardous Materials

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“…Expressions (24) are equivalent to the relations for the component effective diffusivities D~.,n used by Habgood (1958) and Round et al (1966). It must be emphasized that Habgood and Round derived the above expressions by ad hoc reasoning for the special case of two-component diffusion; there is no obvious method for generalizing their result to multicomponent mixtures.…”

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confidence: 99%

Experimental verification of the Maxwell-Stefan theory for micropore diffusion

Broeke

Krishna

1995

Chemical Engineering Science

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Experimental verification of the Maxwell-Stefan theory for micropore diffusion van den Broeke, L.J.P.; Krishna, R. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Abstract--The main objective of this paper is to test the capability of the Maxwell-Stefan theory for predicting the diffusion behaviour of multicomponent mixtures within micropores on the basis of the diffusion behaviour of single components. Diffusion within micropores involves movement of sorbed species. It is an activated process. The proper driving force is the gradient of the surface chemical potential.In the Maxwell-Stefan theory for mieropore diffusion, the adsorption sites on the surface are viewed as pseudo-species, analogous to craters on the surface of the moon. The surface coverage has a significant influence on the mass transfer fluxes. The Maxwell-Stefan theory yields alternative approaches to micropore diffusion as special cases and is consistent with the theory of irreversible thermodynamics. The Maxwell-Stefan diffusivity for signal-component diffusion D is usually referred to as the "corrected" diffusivity in the literature. For binary diffusion, the Maxwell-Stefan equations, when combined with Langmuir adsorption equilibrium, coincide with the formulation derived by Habgood in 1958.To test the predictive capability of the Maxwell-Stefan theory we performed breakthrough experiments with single components and mixtures containing methane, carbon dioxide, propane and propene. These experiments were carried out in a packed bed of microporous activated carbon and with carbon molecular sieves. It is deafly demonstrated that the mixture behaviour can be predicted by the Maxwell-Stefan theory extremely well under a wide range of conditions: co-adsorption, co-desorption and counter-sorption. A model in which the matrix of Fick diffusivities is assumed to be constant is shown to be less successful in this regard.

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A Numerical Analysis of Surface Diffusion in a Binary Adsorbed Film

Cited by 39 publications

References 3 publications

Simulation of diffusion in zeolitic structures

Simulation of diffusion in zeolitic structures

Adsorption dynamics of chlorinated hydrocarbons from multi-component aqueous solution onto activated carbon

Experimental verification of the Maxwell-Stefan theory for micropore diffusion

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