10 research outputs found
Theoretical basis for the Dubinin-Radushkevitch (D-R) adsorption isotherm equation
The Dubinin-Radushkevitch (D-R) equation, which was originally proposed as an empirical adaptation The Polanyi adsorption potential theory, has been the fundamental equation to quantitatively describe the adsorption gases and vapors by microporous sorbents. The equation, based on the postulate that the mechanism for adsorption in micropores is that of pore-filling rather than layer-by-layer surface coverage, generally applies well to adsorption systems involving only van der Waals forces and is especially useful to describe adsorption on activated ???. The ability of the D-R equation to describe gas adsorption on porous materials has inspired many to undertake studies, both experimental and theoretical, to explain the source of the success of the D-R equation in ??? of molecular properties at the gas-solid interface. In many cases, these studies have led to extensions or modifications of the original D-R equation. Many of these attempts and the resulting extensions are reviewed and discussed here. Recently, an isotherm equation was derived for adsorption of gases and vapors on microporous ??? from statistical mechanical principles. It was shown that the D-R equation is an approximated form of this potential theory isotherm. This development is also reviewed and discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43972/1/10450_2005_Article_BF01650130.pd
Physical adsorption of simple gases on the (111) face of sulfur; a model for the adsorption by heterogeneous surfaces, including lateral interactions
Study of the water-bentonite system by vapour adsorption, immersion calorimetry and X-ray techniques: I. Micropore volumes and internal surface areas, following Dubinin's theory
Effect of dehydration on porous structure of monolithic aerogels based on fibrous aluminum oxyhydroxide
Equilibria and kinetics characterisation of two different structured nutshell-derived activated carbons
A Study of the Adsorption–Structural Parameters and Photoactivity of TiO2/Kaolinite Composite
A Study of the Adsorption–Structural Parameters and Photoactivity of TiO2/Kaolinite Composite
The TiO2/kaolinite material—a filler for construction materials with the function of passive degradation of household organic pollutants—has been synthesized and its properties have been examined. Synthesis of the material has been performed under varied conditions: the amount of the reactive mixture and temperature of thermal treatment have been altered. Thereafter, the effect of the synthesis conditions on chemical composition, surface morphology, phase composition, adsorption parameters, and changes in the adsorption activity has been determined at irradiation by UV and visible light