Restricted diffusion in liquids within fine pores

Satterfield, Charles N.; Colton, Clark K.; Pitcher, Wayne H.

doi:10.1002/aic.690190332

Cited by 335 publications

(203 citation statements)

References 26 publications

Supporting

Mentioning

188

Contrasting

Unclassified

Order By: Relevance

“…In addition, our simulations are performed at infinite dilution, while the experimental investigations, although performed at finite concentrations, assumed D* ͑and K p ) to be independent of solute concentration within the pores. This is in contrast to the study of Cannell and Rondelez, 44 who observed a large change in K p D* when the ͑dilute͒ concentration was increased by a factor of 3. Also, in our simulations, there is no adsorption of the solute to the pore walls.…”

Section: ͑29͒contrasting

confidence: 54%

“…This quantity is related to our reduced diffusivity by 44 D eff ϭD b K p D*/ , where D b is the bulk diffusivity, is the volume fraction of the pores, is the tortuosity, and K p is the equilibrium partition coefficient. In 1973, Satterfield et al 44 reported on the diffusion of low molecular weight paraffins, aromatic hydrocarbons, and sugars through homogeneous microporous silica-alumina bead catalyst. For r s /r p Ͻ1/2, they found their data could be fit to the expression D* ϭexp(Ϫ4.6r s /r p ).…”

Section: ͑29͒mentioning

confidence: 99%

“…5 represents Faxen's expression with r s ϭ1.45r h . The Renkin equation has been used with varying success to describe rigid solute diffusion through biological and artificial membranes ͑see Satterfield et al 44 for references͒.…”

Section: ͑29͒mentioning

confidence: 99%

See 2 more Smart Citations

Effect of confinement on DNA dynamics in microfluidic devices

Jendrejack

Schwartz

Graham

et al. 2003

The Journal of Chemical Physics

165

193

View full text Add to dashboard Cite

The dynamics of dissolved long-chain macromolecules are different in highly confined environments than in bulk solution. A computational method is presented here for detailed prediction of these dynamics, and applied to the behavior of ϳ1-100 m DNA in micron-scale channels. The method is comprised of a self-consistent coarse-grained Langevin description of the polymer dynamics and a numerical solution of the flow generated by the motion of polymer segments. Diffusivity and longest relaxation time show a broad crossover from free-solution to confined behavior centered about the point HϷ10S b , where H is the channel width and S b is the free-solution chain radius of gyration. In large channels, the diffusivity is similar to that of a sphere diffusing along the centerline of a pore. For highly confined chains (H/S b Ӷ1), Rouse-type molecular weight scaling is observed for both translational diffusivity and longest relaxation time. In the highly confined region, the scaling of equilibrium length and relaxation time with H/S b are in good agreement with scaling theories. In agreement with the results of Harden and Doi ͓J. Phys. Chem. 96, 4046 ͑1992͔͒, we find that the diffusivity of highly confined chains does not follow the scaling relation predicted by Brochard and de Gennes ͓J. Chem. Phys. 67, 52 ͑1977͔͒; that relationship does not account for the interaction between chain and wall.

show abstract

Section: ͑29͒contrasting

confidence: 54%

Section: ͑29͒mentioning

confidence: 99%

See 1 more Smart Citation

Effect of confinement on DNA dynamics in microfluidic devices

Jendrejack

Schwartz

Graham

et al. 2003

The Journal of Chemical Physics

165

193

View full text Add to dashboard Cite

show abstract

“…Therefore, transport in microporous materials is referred to as configurational diffusion. Although the diffusion theory is based on the kinetic theory of gases (29,31), similar effects have been observed for molecules in the liquid phase (32,33).…”

Section: Surface Area and Diffusion In Microporous Materialsmentioning

confidence: 95%

Adsorption of CO₂ and N₂ on Soil Organic Matter: Nature of Porosity, Surface Area, and Diffusion Mechanisms

Jonge

Mittelmeijer‐Hazeleger

1996

Environ. Sci. Technol.

195

138

View full text Add to dashboard Cite

The surface area of soil organic matter (SOM) is a crucial parameter for the interpretation of sorption mechanisms of organic contaminants. The surface area of three SOM samples was studied by using CO 2 and N 2 gas adsorption, revealing that SOM is a microporous material with a high surface area of 94-174 m 2 g -1 . The ethylene glycol monoethyl ether (EGME) retention technique has major drawbacks for application to SOM samples, as liquid EGME changes the SOM solid phase density. Nitrogen (N 2 ) is subject to molecular sieving at 77 K due to activated diffusion in micropores. CO 2 is not limited by activated diffusion since higher experimental temperatures are applied (273 K). About 95-99% of the SOM surface area is formed by micropores with maximum restrictions of approximately 0.5 nm. Results suggest that the diffusion coefficient of CO 2 is influenced by the crosslinking density of the matrix and that the microporous structure is not strongly affected by hydration of the sample. On the basis of pore dimensions, configurational diffusion is proposed as the primary transport mechanism of nonionic organic contaminants in SOM micropores.

show abstract

“…Satterfield et al, 1973;Guin, 1994. Tsai et al, 1991;Lee et al, 1991;1991a;Chantong andMassoth, 1983.…”

Section: Do1mentioning

confidence: 99%

Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Final technical report, September 20, 1991--September 30, 1996

Guin¹

1998

View full text Add to dashboard Cite

Restricted diffusion in liquids within fine pores

Cited by 335 publications

References 26 publications

Effect of confinement on DNA dynamics in microfluidic devices

Effect of confinement on DNA dynamics in microfluidic devices

Adsorption of CO₂ and N₂ on Soil Organic Matter: Nature of Porosity, Surface Area, and Diffusion Mechanisms

Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Final technical report, September 20, 1991--September 30, 1996

Contact Info

Product

Resources

About

Restricted diffusion in liquids within fine pores

Cited by 335 publications

References 26 publications

Effect of confinement on DNA dynamics in microfluidic devices

Effect of confinement on DNA dynamics in microfluidic devices

Adsorption of CO2 and N2 on Soil Organic Matter: Nature of Porosity, Surface Area, and Diffusion Mechanisms

Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Final technical report, September 20, 1991--September 30, 1996

Contact Info

Product

Resources

About

Adsorption of CO₂ and N₂ on Soil Organic Matter: Nature of Porosity, Surface Area, and Diffusion Mechanisms