EFFECTS OF PREOXIDATION ON THE SURFACE PROPERTIES OF SUPER ACTIVE CARBON

Coke based super activated carbons (SAC) were made by KOH thermo activation. SAC were evaluated by scanning electron microscopy and N 2 adsorption techniques. At the same time the effects of coke preoxidation on the pore structure and surface chemistry of SAC were investigated. Quick activation quenching techniques and in situ TG DTA tests show that coke preoxidation changes the activation process dramatically and retards the formation of mesopores at high temperature. The FT IR study demonstrates that coke preoxidation accelerates the disintegration of aromatic structures during activation and the formation of oxygen containing groups on the carbon surface.