The kinetics of active carbon gasification by oxygen as catalysed by Mo, Co, Ni and their mixtures were studied in the range 350-800°C. The catalysed effect shows saturation above ca. 2.5 wt%. The activation energies and orders were determined. Co and Ni multiply the reaction rate more than 50 times. The mixtures Co-Mo and Ni-Mo show some cooperative effect. Results of in situ XRD for the Mo catalysed reaction are also presented.