ADSORPTION OF WATER ON ACTIVATED CARBON-AN OVERVIEW

摘要: Among different isotherm equations presented for the adsorption of water vapor by AC, those of Dubinin-Serpinsky (D-S) and Talu-Meunier (T-M) are used to fit 107 sets of experimental data found in literature in an attempt to relate the parameters found in these equations to AC properties. The characteristics of adsorption isotherm and hystersis loop are studied foT different type of AC. The effects of temperature on the shape of adsorption isotherm, as well as the effects of pore structure and adsorption cycling on the hysteresis loop are presented. It was found that the isotherm of water adsorption usually has a hysteresis loop, which occurs at a medium to higher water relative pressure. The width of hysteresis loop depends on the structure of carbon and for carbon with very small micropores the hysteresis loop does no exist. For a given type of AC the hysteresis loop would disappear if it were subjected to successive …