Study on the removal of elemental mercury from simulated flue gas by Fe2O3-CeO2/AC at low temperature
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- 作者：Yan Wang ; Caiting Li ; Lingkui Zhao…
- 关键词：Elemental mercury ; Activated coke ; Adsorption ; Catalytic oxidation ; Flue gas ; Low temperature
- 刊名：Environmental Science and Pollution Research
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：23
- 期：6
- 页码：5099-5110
- 全文大小：1,548 KB
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Caiting Li (1) (2)
Lingkui Zhao (1) (2)
Yin’e Xie (1) (2)
Xunan Zhang (1) (2)
Guangming Zeng (1) (2)
Huiyu Wu (1) (2)
Jie Zhang (1) (2)
1. College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People’s Republic of China
2. Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha, 410082, People’s Republic of China - 刊物类别：Earth and Environmental Science
- 刊物主题：Environment
Environment
Atmospheric Protection, Air Quality Control and Air Pollution
Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
Industrial Pollution Prevention - 出版者：Springer Berlin / Heidelberg
- ISSN：1614-7499
文摘
Fe2O3 and CeO2 modified activated coke (AC) synthesized by the equivalent-volume impregnation were employed to remove elemental mercury (Hg0) from simulated flue gas at a low temperature. Effects of the mass ratio of Fe2O3 and CeO2, reaction temperature, and individual flue gas components including O2, NO, SO2, and H2O (g) on Hg0 removal efficiency of impregnated AC were investigated. The samples were characterized by Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Results showed that with optimal mass percentage of 3 % Fe2O3 and 3 % CeO2 on Fe3Ce3/AC, the Hg0 removal efficiency could reach an average of 88.29 % at 110 °C. Besides, it was observed that O2 and NO exhibited a promotional effect on Hg0 removal, H2O (g) exerted a suppressive effect, and SO2 showed an insignificant inhibition without O2 to some extent. The analysis of XPS indicated that the main species of mercury on used Fe3Ce3/AC was HgO, which implied that adsorption and catalytic oxidation were both included in Hg0 removal. Furthermore, the lattice oxygen, chemisorbed oxygen, and/or weakly bonded oxygen species made a contribution to Hg0 oxidation.