吸附剂
烟气
化学
X射线光电子能谱
吸附
汞元素
燃煤
Mercury(编程语言)
煤
傅里叶变换红外光谱
分析化学(期刊)
化学工程
核化学
环境化学
有机化学
工程类
程序设计语言
计算机科学
作者
Lu Dong,Yaji Huang,Hao Chen,Lingqin Liu,Changqi Liu,Ligang Xu,Jianrui Zha,Yongxing Wang,Hao Líu
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2019-07-16
卷期号:33 (8): 7522-7533
被引量:32
标识
DOI:10.1021/acs.energyfuels.9b01136
摘要
A magnetically recoverable composite mercury removal sorbent was produced by introducing magnetic γ-Fe2O3 into attapulgite (ATT) (xFe1ATT) via the co-precipitation method and used to remove Hg0 in the simulated coal-fired power plant flue gas. The as-prepared 0.5Fe1ATT sorbent was characterized by X-ray diffraction, Brunauer–Emmett–Teller, transmission electron microscopy, vibrating sample magnetometer, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy analyses. The results showed that the Hg0 removal performance of the composite of γ-Fe2O3 and ATT was significantly promoted in comparison to pure γ-Fe2O3 and ATT individually. A relatively high magnetization value and good Hg0 removal performance were obtained by the sample of 0.5Fe1ATT. O2 could enhance Hg0 removal activity via the Mars–Maessen mechanism. NO displayed a significant promotion effect on Hg0 removal as a result of the formation of active species, such as NO2 and NO+. SO2 inhibited the removal of Hg0 as a result of its competition adsorption against Hg0 for the active sites and the sulfation of the sorbent. However, the introduction of NO could obviously alleviate the adverse effect of SO2 on the Hg0 removal capability. H2O showed a prohibitive effect on Hg0 removal as a result of its competition with Hg0 for the active sites. The findings of this study are of fundamental importance to the development of efficient and economic magnetic mercury sorbents for Hg0 removal from coal-fired boiler flue gases.
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