P-3-13 酢酸カリウム賦活による高比表面積活性炭の製造

抄録

The activated carbon has superior adsorption performance. Recently, an activated carbon having a large specific surface area has been produced by chemical activation with potassium hydroxide. However, potassium hydroxide is a powerful drug and needs to pay attention to handling. Therefore, in this study, potassium acetate was used as an activating reagent and cellulose was used as a raw material. Cellulose was impregnated with potassium acetate. In nitrogen flow, the impregnated samples were heated up to the carbonization temperature (600-1000°C) at the heating rate of 10°C/min and were holding for 1h. The prepared char was washed by using hot water and was dried. The specific surface area of the prepared activated carbon was analyzed by B.E.T. method using nitrogen adsorption isotherm at 77K. The activated carbon having a specific surface area of 2,880 m2/g was produced from the cellulose impregnated with potassium acetate at the impregnation ratio of 1.0, at the carbonization temperature of 800°C. Further, it was confirmed that potassium acetate acts as activating reagent in the temperature ranges of below 200°C and that potassium acetate is changed to potassium carbonate at 400°C.