The enthalpies of immersion of active carbons, in relation to the Dubinin theory for the volume filling of micropores

It is shown that an exact expression can be derived from Dubinin's theory, for the enthalpy of immersion of active carbons. It appears that for a given liquid, the specific enthalpy of immersion is a function of the characteristic energy β<i>E</i>₀ of the Dubinin-Astakhov equation. The new relation is illustrated by data obtained for 10 different carbons immersed into benzene and <i>n</i>-heptane at 34°C. Simultaneously, results are presented for the immersion into water, not described by Dubinin's theory, but providing useful complementary information about the chemical state of the surface.