Using special thermogravimetry and sorptometry methods physicochemical properties of carbon nanotube surfaces were investigated. A numerical and analytical procedure for the evaluation oftotal heterogeneous properties (desorption energy distribution and pore-size distribution functions) on the basis ofliquid thermodesorplion from the sample surfaces under the quasi-equilibrium conditions are presented. The desorption energy distribution was derived from the mass loss Q-TG and the differential mass loss Q-DTG curves of thermodesorption of pre-adsorbed polar and apolar liquid films. It is shown that the samples are highly sensitive to benzene vapour because the mechanism of liquid adsorption depends largely on the active surface centres and molecular interactions. For the first time, the evaluation ofthe fractal dimensions of nanotubes using the sorptometiy and thermogravimetry data is presented.

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