Preparation of Activated Carbon with High Specific Surface Area from Beer Lees by Chemical Activation with KOH

摘要

Activated carbons with high specific surface area were prepared from beer bees by chemical activation with KOH. We examined the infleunce of the preparation conditions, such as temeprature and impregnatin ratio, on the pore structure of the prepared activated carbon, and examined the adsorption ability of benzene and acetone on the prepared activated carbon. The specific surface area increased with an increase in carbonizzation temeprature up to 800deg C and decreased at 900deg C because of excess activation. It reached a maximum value at the impregnation ratio of 2.0. The activated carbon, which was prepared at the carbonization temeprature of 800deg C and at the impregnation ratio of 2.0, had very high specific surface area of 2,440 m~2/g. It was found that KOH worked effectively as the activating reagent in two temperature ranges, below 500deg C and above 600deg C. The amount of benzene and acetone adsorbed on the prepared activated carbon were much larger than that on the commercial activated carbons.