Abstract: Themercury removal performance ofmodified bamboo charcoal (BC) was investigatedwith a bench-scale fixedbed reactor. A simple impregnation method was used tomodify the BC with ZnCl₂ and FeCl₃ separately. BET and XPS were used to determine the pore structure and surface chemistry of the sorbents. The role of Fe³⁺ in the removal of elemental mercury bymodified sorbents was discussed. The experimental results suggest that themodified BCs have excellent adsorption potential for elemental mercury at a relatively higher temperature, 140 ℃. The BET surface area and average pore size ofmodified sorbents do not shownoticeable priority compared to unmodified BC. XPS spectra indicate that Fe atoms mainly exist in the form of Fe³⁺ for the FeCl₃-impregnated BC. Better performance of FeCl₃-impregnated BC at different temperatures (20, 140 and 180 ℃) suggests the enhancement of non-chloride functional groups (Fe³⁺). Inhibition effect of SOx and NO for Hg⁰ removal by BC samples is present in the study.

Key words: Elemental mercury, Bamboo charcoal, FeCl₃, ZnCl₂

摘要： Themercury removal performance ofmodified bamboo charcoal (BC) was investigatedwith a bench-scale fixedbed reactor. A simple impregnation method was used tomodify the BC with ZnCl₂ and FeCl₃ separately. BET and XPS were used to determine the pore structure and surface chemistry of the sorbents. The role of Fe³⁺ in the removal of elemental mercury bymodified sorbents was discussed. The experimental results suggest that themodified BCs have excellent adsorption potential for elemental mercury at a relatively higher temperature, 140 ℃. The BET surface area and average pore size ofmodified sorbents do not shownoticeable priority compared to unmodified BC. XPS spectra indicate that Fe atoms mainly exist in the form of Fe³⁺ for the FeCl₃-impregnated BC. Better performance of FeCl₃-impregnated BC at different temperatures (20, 140 and 180 ℃) suggests the enhancement of non-chloride functional groups (Fe³⁺). Inhibition effect of SOx and NO for Hg⁰ removal by BC samples is present in the study.

关键词: Elemental mercury, Bamboo charcoal, FeCl₃, ZnCl₂