An Isotherm Equation for Adsorption on Fractal Surfaces of Heterogeneous Porous Materials

David Avnir; Mieczyslaw Jaroniec

doi:10.1021/la00090a032

An Isotherm Equation for Adsorption on Fractal Surfaces of Heterogeneous Porous Materials

David Avnir^*, Mieczyslaw Jaroniec

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

600 Scopus citations

Abstract

Imposing a pore size distribution of a fractal surface on the Dubinin approach for adsorption in porous materials yields the simple isotherm θ= K[ln (Po/p)]^0-3in which θis the relative adsorption, p₀and p are the saturation and equilibrium pressures, respectively, K is a constant, and D is the fractal dimension of the surface accessible to adsorption. The isotherm has the form of the Frenkel-Halsey-Hill (FHH) equation, and the theoretical range of the exponent 3 — D (2 < D < 3) indeed falls into the range of experimentally observed FHH exponents.

Original language	English
Pages (from-to)	1431-1433
Number of pages	3
Journal	Langmuir
Volume	5
Issue number	6
DOIs	https://doi.org/10.1021/la00090a032
State	Published - 1 Nov 1989

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abstract = "Imposing a pore size distribution of a fractal surface on the Dubinin approach for adsorption in porous materials yields the simple isotherm θ= K[ln (Po/p)]0-3in which θis the relative adsorption, p0and p are the saturation and equilibrium pressures, respectively, K is a constant, and D is the fractal dimension of the surface accessible to adsorption. The isotherm has the form of the Frenkel-Halsey-Hill (FHH) equation, and the theoretical range of the exponent 3 — D (2 < D < 3) indeed falls into the range of experimentally observed FHH exponents.",

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N2 - Imposing a pore size distribution of a fractal surface on the Dubinin approach for adsorption in porous materials yields the simple isotherm θ= K[ln (Po/p)]0-3in which θis the relative adsorption, p0and p are the saturation and equilibrium pressures, respectively, K is a constant, and D is the fractal dimension of the surface accessible to adsorption. The isotherm has the form of the Frenkel-Halsey-Hill (FHH) equation, and the theoretical range of the exponent 3 — D (2 < D < 3) indeed falls into the range of experimentally observed FHH exponents.

AB - Imposing a pore size distribution of a fractal surface on the Dubinin approach for adsorption in porous materials yields the simple isotherm θ= K[ln (Po/p)]0-3in which θis the relative adsorption, p0and p are the saturation and equilibrium pressures, respectively, K is a constant, and D is the fractal dimension of the surface accessible to adsorption. The isotherm has the form of the Frenkel-Halsey-Hill (FHH) equation, and the theoretical range of the exponent 3 — D (2 < D < 3) indeed falls into the range of experimentally observed FHH exponents.

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An Isotherm Equation for Adsorption on Fractal Surfaces of Heterogeneous Porous Materials

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