Study on the Preparation of Activated Carbon from Corncobs

The impact of activator varieties on the activation effect in preparing activated carbon with corncob adopting chemical activation process were researched in this paper, the results showed that phosphoric acid as the activator was much better than potassium hydroxide and zinc chloride. It was deduced from the orthogonal experiment results that the impact of activation temperature on the activation effect is the greatest, impregnation ratio takes the second place, and the activator concentration the least. Suitable parameters of activation process were obtained: when the activator concentration is 50%, activation temperature 500°C, impregnation ratio 2.7:1, the iodine value of activated carbon is 822.08mg/g.