Oxidation stabilization is the core process in the preparation of coal pitch based spherical activated carbon. Consequently the understanding of process characteristics and kinetic mechanism is the key to accomplish oxidation process optimization. The effects of particle size range

heating rate and oxidative temperature on oxidation stabilization process were discussed by experiments which used coal pitch spheres as the raw materials. The kinetic parameters and reaction mechanism function were determined. The results show that oxidation stabilization mainly consists of four stages

light component pyrolysis

preliminary oxidation

oxidative weight increment and constant temperature oxidative weightlessness

respectively. After oxidation stabilization

carbon and hydrogen content of coal pitch spheres reduce

oxygen content increases

and surface is much smoother. Reducing the particle size and selecting the appropriate heating rate(0.25-0.5℃·min-1) and oxidative temperature(275-325℃) are beneficial for oxidation stabilization. The activation energy reaches the minimum values at particle size range of 0.3-0.6 mm

heating rate of 0.5℃·min-1 and oxidative temperature of 300℃

which are 83.34

293.19

302.25 and 357.05 kJ·mol-1 in every stage.