摘要
采用超声波辅助浸渍法制备Fe_2O_3/γ-Al_2O_3吸附剂,利用固定床反应器,在模拟富氧燃烧烟气条件下研究了烟气组分CO_2、SO_2以及H2O对Fe_2O_3/γ-Al_2O_3吸附剂脱除气相砷的影响特性及机理。结果表明,O_2/CO_2燃烧方式下,高浓度CO_2极大的抑制了吸附剂对气相砷的吸附,而高浓度的H2O则在一定程度上促进了吸附进程。O_2/CO_2气氛中,一定范围内SO_2浓度的升高对Fe_2O_3/γ-Al_2O_3吸附气相砷具有促进作用,当吸附气氛中的SO_2超过一定浓度时,则对气相砷的吸附产生抑制,此时吸附气氛中O_2浓度的提高有助于缓解高浓度SO_2的抑制作用。
The sorbent of Fe2O3/γ-Al2O3 prepared by ultrasonic-assisted precipitation method were applied to remove gas-phase arsenic in simulated flue gas of oxy-coal combustion. To investigate the influence of high concentration of carbon dioxide, sulfur dioxide and water vapor on gas-phase arsenic removal by Fe2O3/γ-Al2O3 in oxy-coal combustion, a laboratory scale experiment was carried out. The results show that CO2 greatly inhibits arsenic removal by Fe2O3/γ-Al2O3 and high concentration of H20 can promote adsorption process to a certain extent. Within a certain concentration, the increase of SO2 has a promotion effect to adsorption. Once the SO2 concentration exceeds a certain value, it brings inhibition. And at this point, the increase of oxygen concentration will contribute to eliminate the inhibition effect of high concentration of SO2.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第6期1746-1752,共7页
Proceedings of the CSEE
基金
国家863高技术基金项目(2013AA065501)~~
