This work is aims to reveal the heterogeneity of synthetic active carbons SCS at various extents of activation. For this purpose a comparison of various methods for analyzing the benzene adsorption isotherms (alpha(s), Dubinin-Astakhov, Dubinin-Stoeckli, Jaroniec-Choma) is carried out. It has been shown that micropores of carbons SCS are uniform. For description of adsorption data and energy distribution the Dubinin-Astakhov equation with exponent n close to or greater than 3 is most suitable. During the progress of activation the total heterogeneity of SCS carbons changes from a broad to a one peak distribution function.