Performance comparison of coking fly ash-based activated carbons by different activated methods

The activated carbons were prepared from coking fly ash with steam activation and potassium hydroxide as the activating agents,respectively.The iodine sorption values,BET specific surface areas,pore size distributions,pore volumes and surface morphologies of the obtained samples had been characterized.The results show that the adsorption performance of activated carbon activated by potassium hydroxide is better than those made by steam.The obtained activated carbon activated by potassium hydroxide was of mesopore type with a BET specific surface area of 275.51 m2/g.