Adsorption in bidisperse‐pore systems

Petersen, Eugene E.

doi:10.1002/aic.690370505

Cited by 17 publications

(13 citation statements)

References 7 publications

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“…This model was also applied for the analysis of diffusion and reaction in a catalyst with a bidisperse pore structure (Tartarelli et al, 1970). Recently, the Turner structure of a bidisperse model was adopted to study adsorption, because of its simplicity; the geometry of macro-and micropores and the diffusivities within pores are then well defined (Petersen, 1991;Silva and Rodrigues, 1999). A similar structure was used to study the competition between diffusion and reaction mechanism and therefore to develop methodologies for the design of reactors using structured catalysts (McGreavy et al, 1994).…”

Section: Sourcementioning

confidence: 99%

Kinetic studies in a batch reactor using ion exchange resin catalysts for oxygenates production: Role of mass transfer mechanisms

Silva

Rodrigues

2006

Chemical Engineering Science

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Section: Sourcementioning

confidence: 99%

Kinetic studies in a batch reactor using ion exchange resin catalysts for oxygenates production: Role of mass transfer mechanisms

Silva

Rodrigues

2006

Chemical Engineering Science

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“…Doong and Yang (20) simplified a linear adsorption bidisperse pore diffusion model by assuming parabolic concentration profiles for micropore and macropore zones. More recently, Peterson (23) equations for the biporous geometry of Turner (24). Linear adsorption was assumed to occur in cylindrical micropores connected as branches off cylindrical macropores.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Kinetics of Toluene on Soil Agglomerates: Soil as a Biporous Sorbent

Arocha

Jackman

McCoy

1996

Environ. Sci. Technol.

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Single-component vapor diffusion at low pressure into dry soil agglomerates provides a well-characterized system for investigating adsorption and diffusion mechanisms. Equilibrium and kinetic data for adsorption of toluene vapor on Yolo loam and montmorillonite clay were obtained in this study with a gravimetric method. More extensive equilibrium data were obtained with a headspace gas chromatographic technique. Freundlich isotherms provided a good fit to the equilibrium data for relative partial pressures less than 0.6. Adsorption of toluene from the gas phase occurred in two stages: the first was due to fast diffusion and adsorption in macropores, and the second was controlled by slower diffusion and adsorption in intragrain micropores. As several days are required to establish equilibrium, the effect of slow diffusion and adsorption would be overlooked in shorter studies. Numerical simulations described the isothermal adsorption of toluene on spherical soil particles subject to a step change in bulk concentration. Biporous diffusion models are necessary to interpret the distinct diffusional characteristics of toluene in macropores and micropores with nonlinear adsorption. The simulations quantitatively describe details of the adsorption history.

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“…1c. Because of its simplicity, Turner's model was used extensively to describe the diffusion and reaction or adsorption in bidisperse pores (Mann and Thomson 1987;Petersen 1991;Tartarelli et al 1970). Based on Turner's model, Silva and Rodrigues (Silva and Rodrigues 1999) made an extension of Ruckenstein's work to nonlinear adsorption equilibrium with negligible macropore adsorption.…”

Section: Introductionmentioning

confidence: 99%

A model for transient diffusion in bidisperse pore structures

Sun

Chen

et al. 2019

Pet. Sci.

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A bidisperse model for transient diffusion and adsorption processes in porous materials is presented in this paper. The mathematical model is solved by numerical methods based on finite elements combined with the linear driving force approximation. A criterion based on the model to identify the diffusion controlling mechanism (macropore diffusion, micropore diffusion, or both) is proposed. The effects of different adsorption isotherms (linear, Freundlich, or Langmuir) on the concentration profiles and on curves of fractional uptake versus time are investigated. In addition, the influences of model parameters concerning the pore networks on the fractional uptake are studied as well.

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Adsorption in bidisperse‐pore systems

Abstract: Adsorption of a strongly bound absorbate in a bidisperse

Cited by 17 publications

References 7 publications

Kinetic studies in a batch reactor using ion exchange resin catalysts for oxygenates production: Role of mass transfer mechanisms

Kinetic studies in a batch reactor using ion exchange resin catalysts for oxygenates production: Role of mass transfer mechanisms

Adsorption Kinetics of Toluene on Soil Agglomerates: Soil as a Biporous Sorbent

A model for transient diffusion in bidisperse pore structures

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