水蒸气活化法制备椰壳活性炭的孔结构特征

ctivated carbons were prepared from coconut shells by using carbonization at 600℃ for 2h followed by steam activation. The effects of activation temperature, hold time and steam amount on yield, BET surface area and micropore volume were systematically studied. The pore structure of the activated carbon was characterized by N2 adsorption at 77K. BET Surface area, micropore volume and pore size distribution (PSD) of the carbons were determined by the BET (Brunauer-Emmett-Teller), DR (Dubinin-Radushkevich) and NLDFT (nonlocal density functional theory) methods. The results showed that chars of coconut shell with BET surface area of 185m2/g, mesopore is mostly in pore structure. Hold time could be reduced by increasing steam amount and activation temperature, but micropore was enlarged and yield was decreased on activation procedure. The BET surface area, total volume and micropore volume of activated carbons were 1465m2/g, 0.9703cm3/g and 0.7519cm3/g, respectively.