Why should pore size distribution of an activated carbon obtained with different probe molecules be different?

J.P. TOSO; R.H. LÓPEZ; D.A. SOARES MAIA; J.C.A DE OLIVEIRA; V. CORNETTE; M. LUCENA; C.L. CALVALCANTE; D.C.S ACEVEDO; G. ZGRABLICH

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Conferencia; XI International Conference MODERN PROBLEMS OF ADSORPTION; 2011

The determination of the Pore Size Distribution (PSD) of activated carbons (AC) by fitting adsorption measurements with Monte Carlo simulated adsorption isotherms is discussed, with special emphasis on the problem of the unicity of the PSD when different probe molecules are used in the adsorption experiments. Experimental and theoretical evidence is presented, which explains why the PSDs of a given sample obtained by fitting experimental adsorption isotherms corresponding to different probe molecules should be different.