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By Françoise Rouquerol; J Rouquerol; K S W Sing

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Extra resources for Adsorption by powders and porous solids : principles, methodology, and applications

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E. by both adsorbent and adsorptive). There are a few adsorbents which give rise to essentially non-specific interactions with a wide range of different adsorptives. The most important non-porous adsorbent of this type is graphitized carbon black, which in its most uniform state has a surface structure composed almost entirely of the graphitic basal planes. When a polar molecule is adsorbed on this surface, Ens is much larger than Esp, which is unlikely to contribute more than 10% to the total interaction energy.

M. (1978) Zeolites and Clay Minerals as Sorbents and Molecular Sieves, Academic Press, London. V. A. (1970), Chromatographia, 3, 254. British Standards Institution (1958) British Standard 2955, BSI, London. British Standards Institution (1992) British Standard 7591, Part 1, BSI, London. Brunauer S. (1945) The Adsorption of Gases and Vapours, Oxford University Press, Oxford. , Emmett P. H. and Teller E. (1938) J. Am. Chem. , 60, 309. S. and Teller E. (1940) J. Am. Chem. Soc. 62, 1723. A. W. (1991) J.

If the adsorption takes place at constant T, V, A and n, the Helmholtz energy Fr, v,a,n is the thermodynamic potential of the adsorption system since this potential attains the minimum value at equilibrium" :0 T,V,A,n * Traditionally called ~nergie libre in French. Note that by adopting the symbol F we avoid confusion with the area A. CHAPTER 2. THERMODYNAMICS OF ADSORPTION 33 At equilibrium the surface excess amount is n ~ n - n g, where n g is the amount of adsorptive in the gas phase, up to the GDS.

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