Abstract

It is shown that the values of the structural constant B and of the micropore volume W o can change considerably for certain active carbons, when the adsorption of simple gases is measured over a large range of temperature. The changes are probably related to ultramicroporosity, present in heterogeneous carbons, and to activated diffusion into typical micropores, through constrictions. It is suggested that the quantity B is not necessarily a constant for a given solid, as assumed previously.

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