Significance of Fe2O3 modified SCR catalyst for gas-phase elemental mercury oxidation in coal-fired flue gas
Significance of Fe2O3 modified SCR catalyst for gas-phase elemental mercury oxidation in coal-fired flue gas
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Fe2O3改性SCR催化剂对燃煤烟气气相单质汞氧化的意义
DOI：
10.1016/j.fuproc.2016.04.007
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发表时间：
2016-08
影响因子：
7.5
通讯作者：
Yan Nai-Qiang
中科院分区：
文献类型：
--
作者：
Huang Wen-Jun;Xu Hao-Miao;Qu Zan;Zhao Song-Jian;Chen Wan-Miao;Yan Nai-Qiang
为了提高工业选择性催化还原（SCR）催化剂对气态单质汞的催化氧化能力，引入了Fe 2 O3。Fe_2O_3改性可显著提高SCR催化剂对单质汞的氧化能力。以浸渍法制备的Fe 2 O3/SCR为催化剂，在模拟烟气中进行汞的氧化，考察了Fe 2 O3的作用。温度窗口为150至450 °C。在本研究中，Fe 2 O3/SCR（1%Fe，wt.）在350 °C下，模拟烟气中汞的氧化效率大于90%，是一种最佳的催化剂。采用X射线衍射（XRD）、Brunauer埃米特泰勒（BET）和X射线光电子能谱（XPS）对催化剂进行了表征。结果表明，Fe 2 O3在SCR催化剂表面均匀分散。催化剂的比表面积和催化氧化活性并不一致，且汞原子的直径远小于Fe 2 O3/SCR催化剂的孔径。Fe 2 O3的负载量是影响汞去除效果的重要因素。HCl是最有效的烟气组分负责Hg 0氧化。而SO2对Hg 0的氧化有轻微的抑制作用。此外，进行汞价态的变化实验。并对Hg 0的氧化机理进行了探讨。
To improve the ability of commercial selective catalytic reduction (SCR) catalyst to catalyze the oxidation of gaseous elemental mercury, Fe2O3was introduced. Modifying with Fe2O3can significantly enhance the elemental mercury oxidation ability of SCR catalyst. Fe2O3/SCR prepared by an impregnation method was employed as mercury oxidation catalysts in the simulated flue gas, and the role of Fe2O3was investigated. The temperature window was from 150 to 450 °C. In this study, Fe2O3/SCR (1% Fe, wt.) was found to be an optimal catalyst with a mercury oxidation efficiency of higher than 90% at 350 °C using a simulated flue gas. The catalysts were characterized by X-ray diffraction (XRD), Brunauer Emmet Teller (BET) measurements, and X-ray photoelectron spectroscopy (XPS). The results indicated that the Fe2O3was well-dispersed on the surface of SCR. The surface areas and catalytic oxidation activity were not consistent patterns, and the diameter of the mercury atom was much smaller than the pore diameter of the Fe2O3/SCR catalysts. Loading content of Fe2O3was a very important factor for the removal of mercury. HCl was the most effective flue gas component responsible for the Hg0oxidation. However, SO2had a slight inhibition effect on Hg0oxidation. Furthermore, change experiment of a mercury valence state was performed. And the mechanism of Hg0oxidation was also discussed.
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影响因子：
--
作者：
L. Zhong;Yan Cao;Wen‐ying Li;W. Pan;K. Xie
通讯作者：
L. Zhong;Yan Cao;Wen‐ying Li;W. Pan;K. Xie
影响因子：
4.2
作者：
Kamata, Hiroyuki;Ueno, Shun-ichiro;Yukimura, Akinori
通讯作者：
Yukimura, Akinori
影响因子：
11.4
作者：
Shou‐Heng Liu;Naiqaing Yan;Zhao Liu;Zan Qu;H. -. Wang;S. Chang;Charles Miller
通讯作者：
Shou‐Heng Liu;Naiqaing Yan;Zhao Liu;Zan Qu;H. -. Wang;S. Chang;Charles Miller
影响因子：
11.4
作者：
N. Yan;Wanmiao Chen;Jie Chen;Zan Qu;Yongfu Guo;Shijian Yang;J. Jia
通讯作者：
N. Yan;Wanmiao Chen;Jie Chen;Zan Qu;Yongfu Guo;Shijian Yang;J. Jia
DOI：
10.3155/1047-3289.59.11.1331
发表时间：
2009-11-01
影响因子：
2.7
作者：
Bhardwaj, Ravi;Chen, Xihua;Vidic, Radisav D.
通讯作者：
Vidic, Radisav D.