中南大学学报（自然科学版）2012，Vol.43Issue(4)：1233-1238,6.
核桃壳真空化学活化制备活性炭
Preparation of activated carbons from walnut shells by vacuum chemical activation
摘要
Abstract
Activated carbons were prepared from walnut shells by vacuum chemical activation. The effects of system pressure, activation temperature and impregnation ratio on the properties (BET surface area, pore size distribution, iodine and methylene blue adsorption values, and surface characteristics) of activated carbon were studied. The results show that the BET surface area and total pore volume of activated carbon obtained at system pressure of 30 kPa have increased by 27% and 25% respectively compared with those of activated carbon prepared under atmospheric condition. Vacuum condition is beneficial to develop microporous structure, and mesopore tends to be well developed at high impregnation ratio. The activated carbon prepared at system pressure of 30 kPa, activation temperature of 450 ℃, and impregnation ratio of 2.0, possesses a BET surface area of 1 800 m2/g, a total pore volume of 1.176 cm3/g, an iodine adsorption value of 1 050 mg/'g. a methylene blue adsorption value of 315 mg/g and an isoelectric point of 9.15.关键词
活性炭/真空化学活化/核桃壳Key words
activated carbon/ vacuum chemical activation/ walnut shell分类
化学化工引用本文复制引用
杨娟,丘克强..核桃壳真空化学活化制备活性炭[J].中南大学学报（自然科学版）,2012,43(4):1233-1238,6.基金项目
中央高校基本科研业务费资助项目(1177-7215OO193) （1177-7215OO193）
