Using coconut shell from Indonesia as raw material,the activated carbon with a high specific surface area and large micropore content is successfully prepared through pre-oxidation,carbonization and activation.It is proved that pre-oxidation is beneficial to increasing specific surface area of coconut shell activated carbon,especially that of the micropore.The influences of pre-oxidation temperature on the yield,density,surface functional groups and pore structure of the prepared coconut shell activated carbon are investigated.It is shown by results that the strengths of O/C,carbonyl,carboxyl,ester and other oxygen-containing functional groups increase firstly and decrease then with the increasing temperature because dehydration,hydroxyl oxidation and decarboxylation happen during the pre-oxidation process,those reach the maximum at 280℃.The specific surface area,pore volume and microporosity of the prepared coconut shell activated carbon firstly increase and then decrease with the increasing temperature.Its pore structure parameters reach the optimal at 330℃.
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