Abstract: Using walnut shell of agricultural waste as raw material and desulfurized slag of steelmaking by-products as additive, desulfurized slag-novel biomass activated carbon was prepared by blending method. The desulfurized slag-novel biomass activated carbon was used for flue gas desulphurization in a fixed-bed reactor. The impact of operating parameters such as SO2 inlet concentration, space velocity, bed temperature, moisture content and O2 concentration on the desulfurization efficiency of desulfurized slag-novel biomass activated carbon was investigated. The results show that with the increase of SO2 inlet concentration and space velocity, breakthrough sulfur capacity and desulfurization penetration time of desulfurized slag-novel biomass activated carbon were reduced. Bed temperature was a significant factor. Moisture content and O2 concentration were beneficial to chemical adsorption of desulfurized slag-novel biomass activated carbon. The optimal process parameters desulfurization of desulfurized slag-novel biomass activated carbon, such as SO2 inlet concentration, space velocity, bed temperature, moisture content and O2 concentration were 0. 25%, 750 h-1 , 85 ℃, 9% and 12% respectively. The breakthrough sulfur capacity is 274. 1 mg/g and desulfurization penetration time is 31 h.

Key words: novel biomass;activated carbon;desulfurized slag;flue gas desulfurization;walnut shell