Mercury Removal from Coal Combustion Flue Gas by Fly Ash
The effect of physicochemical properties on the mercury adsorption performance of three fly ash samples has been investigated.The samples were tested for mercury adsorption using a fixed-bed with a simulated gas.X-ray fluorescence spectroscopy,X-ray photoelectron spectroscopy and other methods were used to characterize the samples.The results indicate that mercury adsorption on fly ash is mainly physisorption and chemisorption.Uncompleted burned carbon is an important factor for the improvement of mercury removal efficiency,especially,the C-M bond may improve the oxidation of mercury,which formed via the reaction of C and Ti,Si and other elements.The higher specific surface areas and smaller pore diameter are all beneficial for the high mercury removal efficiency.The presence of O2 plays a positive role on Hg adsorption of modified fly ash,while SO2 has double role of inhibition because of competitive adsorption and promotion to chemisorption.In addition,sample modified with FeCl3 has a great performance in Hg removal.
Hg Modified fly ash Adsorption
Junyan Kuang Wenqing Xu Tingyu Zhu Pengfei Jing
Research Center for Process Pollution Control,National Engineering Laboratory for Hydrometallurgical Research Center for Process Pollution Control,National Engineering Laboratory for Hydrometallurgical
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
272-275
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）