+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Kinetics of isothermal gas adsorption on heterogeneous solid surfaces: equations based on generalization of the statistical rate theory of interfacial transport

Kinetics of isothermal gas adsorption on heterogeneous solid surfaces: equations based on generalization of the statistical rate theory of interfacial transport

Journal of Physical Chemistry. B 109(46): 21868-21878

Two generalizations of the statistical rate theory (SRT) approach have been developed for the kinetics of adsorption/desorption on/from heterogeneous surfaces and then compared to each other. The first of them is an improved version of the description based on the condensation approximation (CA) used by us. The other one is an exact generalization for the Langmuir model of adsorption. The latter generalization does not lead to simple analytical expressions for the rate of adsorption/desorption as the CA approach does for typical adsorption energy distributions. The comparison of these two approaches suggests, however, that at small and very high surface coverages the CA approach may not be sufficiently accurate. Very intriguing results are obtained when the developed SRT kinetic equations are applied to describe the kinetics of sorption in carbon molecular sieves. It appears that the fit of experimental data is then equally good as that obtained by assuming that the rate of sorption is controlled by surface diffusion in pores. Also, it is shown that the square-root dependence on time of adsorption at small initial coverages cannot be treated as a definite proof for that sorption proceeds via surface diffusion, as is commonly assumed.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 049438809

Download citation: RISBibTeXText

PMID: 16853841

DOI: 10.1021/jp052671v

Related references

Kinetics of solute adsorption at solid/solution interfaces: a theoretical development of the empirical pseudo-first and pseudo-second order kinetic rate equations, based on applying the statistical rate theory of interfacial transport. Journal of Physical Chemistry. B 110(33): 16514-16525, 2006

Kinetics of metal ions adsorption at heterogeneous solid/solution interfaces: A theoretical treatment based on statistical rate theory. Journal of Colloid and Interface Science 327(1): 36-43, 2008

Adsorption kinetics at the solid/solution interface: statistical rate theory at initial times of adsorption and close to equilibrium. Langmuir 24(20): 11669-11676, 2008

Application of the statistical rate theory of interfacial transport to interpret the relaxation time of proton adsorption from solution onto oxides. Journal of Physical Chemistry. B 110(26): 13138-13143, 2006

Adsorption kinetics of proteins onto solid surfaces in the limit of the interfacial interaction control. Colloids and Surfaces 29(4): 359-372, 1988

A novel weighted density functional theory for adsorption, fluid-solid interfacial tension, and disjoining properties of simple liquid films on planar solid surfaces. Journal of Chemical Physics 131(2): 024704, 2009

Description of desorption kinetics at the solid/solution interface based on the statistical rate theory. Langmuir 24(22): 13013-8, 2008

Statistical verification of parameters describing liquid adsorption on heterogeneous solid surfaces. Journal of AOAC International 82(6): 1495-1504, November-December, 1999

Statistical thermodynamics of adsorption from multicomponent liquid mixtures on heterogeneous solid surfaces. Monatshefte für Chemie - Chemical Monthly 112(1): 59-71, 1981

Vapour adsorption kinetics: statistical rate theory and zeta adsorption isotherm approach. Physical Chemistry Chemical Physics 18(36): 25538-25545, 2016

Sticking coefficient and pressure dependence of desorption rate in the statistical rate theory approach to the kinetics of gas adsorption. Carbon monoxide adsorption/desorption rates on the polycrystalline rhodium surface. Physical Chemistry Chemical Physics 8(32): 3782-3795, 2006

On the enthalpic effects accompanying the mixed-gas adsorption on heterogeneous solid surfaces: a theoretical description based on the integral equation approach. Colloids and Surfaces A: Physicochemical and Engineering Aspects 196(1): 51-61, 2002

Adsorption from solutions of nonelectrolytes on heterogeneous solid surfaces: A four-parameter equation for the excess adsorption isotherm. Monatshefte für Chemie - Chemical Monthly 115(5): 541-550, 1984

Modeling polymer-induced interactions between two grafted surfaces: comparison between interfacial statistical associating fluid theory and self-consistent field theory. Journal of Chemical Physics 131(4): 044908, 2009

A Novel SolidLiquid Equilibrium Model for Describing the Adsorption of Associating Asphaltene Molecules onto Solid Surfaces Based on the Chemical Theory. Energy & Fuels 28(8): 4963-4975, 2014