Novel activation process for preparing highly microporous and mesoporous activated carbons

摘要

An imporved ZnCl_2-chemical activation method is propsoed to produce highly porous activated carbons. The novel process can produce either microporous carbons or mesoporous carbons from lignocellulosic materials, such as coconut shells and palm seeds. The porosity of the resultant activated crbons was characterized by nitrogen adsortion isotherms at 77 K. The BET-surface area os the carbons can be over 2400 m~2/g; the mesopore content (ratio of mesopore volume to total pore volume) is 71. Furthermore, the activated carbon from palm seeds possesses mesopore content as high as 94. Thermogravimetric analysis (TGA) was used to monitor the course of pyrolyiss of coconut shell and ZnCl_2-impregnated coconut shell.The adsorptive propertiees for phenol and dyes were tested.