Kinetics of SO2 Adsorption on Powder Activated Carbon in a Drop Tube Furnace

SO 2 (S) adsorption kinetics on the powdered activated carbons (AC) was performed in a laboratory-scale drop tube furnace.e reaction conditions affecting the adsorption of SO 2 , such as AC/S molar ratio, temperature, the concentration of SO 2 , O 2 , and H 2 O, and AC circulation rate, were studied.e powdered AC rapidly adsorbs SO 2 in the initial 1.2 seconds and then the amount of SO 2 adsorption slowly increases.e SO 2 removal rate increases with the increasing of AC/S molar ratio, the decreasing of adsorption temperature, and inlet SO 2 concentration.e O 2 and H 2 O are beneficial to SO 2 removal by powdered AC.SO 2 removal rate drops to 6.83% after 14 cyclic adsorptions.e powdered AC circulation increases SO 2 removal rate from 62.35% to 99.42% with AC circulation ratio � 7. e SO 2 adsorption kinetics can be predicted by Bangham model.