水酸化ナトリウムを用いた薬品賦活によるスギ鋸屑からの高比表面積活性炭の調製

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This paper studied the characteristics of activated carbon prepared from Japanese cedar sawdust through chemical activation with sodium hydroxide. Two paths of sample preparation were tested. One is to activate raw sawdust, and the other does carbonized sawdust. Samples were prepared under a range of activating conditions(temperature, time and chemical ratio) and carbonization(temperature and time). The characterization of the activated carbon and its preparation processes were made through yield, specific surface area measured by BET and texture observed by SEM photograph. The samples activated before carbonization show sponge-like texture and specific surface area higher than 2000 m^2 g^<-1>, but their yield was low as several percent. As a result, the appropriate conditions of chemical activation and carbonization give the activated carbon having 1600 m^2 g^<-1> of specific surface area in yield of 15%.