Features of activation of chars, produced from Kansk-Achinsk lignite by different pyrolysis technologies, were studied in installation with a fluidized bed reactor. The influence of lignite carbonization parameters of the char reaction ability towards its activation by water steam and oxygen and char sorption properties was established and discussed. Some relations between the degree of lignite carbonization, the time of treatment and chars surface area, and their sorption ability were found. The empirical equation was obtained describing the dynamics at char gasification at 400-700 degrees C and oxygen concentration 1%-4%.