超声波辅助浸渍法制备Fe2 O3/γ-Al2 O3吸附剂脱除气相As2 O3的实验研究

摘要

使用超声波辅助浸渍法制备Fe2 O3/γ-Al2 O3吸附材料，在固定床反应器上研究了前驱液浸渍浓度、载体粒径、吸附温度、吸附气氛等因素对脱除气相As2 O3的影响。结果表明，前驱液浸渍浓度、载体粒径等会对吸附剂表面结构产生影响从而影响其砷吸附性能；吸附温度升高增强了其化学吸附能力，然而，温度过高反而造成吸附性能的下降；吸附气氛中的SO2促进了Fe2 O3/γ-Al2 O3对气相砷的吸附，气氛中的NO对气相砷的影响不大。%Ultrasound-assisted wet impregnation method was used to prepare the Fe2 O3/γ-Al2 O3 sorbent. The effects of the precursor solution content, carrier size, adsorption temperature and atmosphere on the arsenic capture efficiency in a fixed-bed reactor were investigated. The results show that the precursor solution concentration and the size of carrier can affect the arsenic adsorption efficiency. The increasing of adsorption temperature enhances the chemical adsorption ability. However, the efficiency will be decreased if the temperature is over 600℃. The addition of SO2 in the atmosphere will enhance the arsenic adsorption ability of Fe2 O3/γ-Al2 O3 . The influence of NO on the capture efficiency is not significant during this study.