Cobalt manganese oxides modified titania catalysts for oxidation of elemental mercury at low flue gas temperature
Cobalt manganese oxides modified titania catalysts for oxidation of elemental mercury at low flue gas temperature
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钴锰氧化物改性二氧化钛催化剂用于低烟气温度氧化元素汞
DOI：
10.1016/j.cej.2013.09.060
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发表时间：
2014-01
影响因子：
15.1
通讯作者：
Jun Xiang
中科院分区：
文献类型：
--
作者：
Jun Song;Song Hu;Zhichao Liu;Jun Xiang
Cobalt manganese oxides modified titania (CoxMnyTi) catalysts synthesized by a deposition–precipitation method were employed to oxidize gas-phase elemental mercury (Hg0) without the aid of HCl at low temperature on a laboratory-scale fixed-bed reactor. The roles of O2, NO, SO2and H2O in Hg0oxidation over the optimal catalyst were also evaluated. The catalysts were characterized by N2adsorption–desorption, SEM, TEM, XRD, XPS and TPR to determine the pore and surface chemistry structures. The results showed that with optimal loading of 6% Co species on Mn30Ti, the Hg0oxidation efficiency could reach around 98% at 150 °C. A great increase in Hg0oxidation over Co6Mn30Ti catalyst with the assistance of O2occurred via the Mars-Maessen mechanism. In comparison with pure N2atmosphere, the presence of NO can slightly promote the oxidation of Hg0. The effects of SO2and H2O with lower concentrations were insignificant. However, when SO2further increased above 1000 ppm, a seriously inhibitory influence on Hg0oxidation was observed. The characterization results indicated that physical characteristics were not the main contributor for Hg0oxidation. The presence of CoOxled to a better dispersion and more amorphous species of MnOxover TiO2. Compared with those of Mn30Ti and Co30Ti catalysts, the chemisorbed oxygen of Co6Mn30Ti catalyst increased greatly, which played an important role in the promotion of Hg0oxidation.
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影响因子：
22.1
作者：
Li Xue;Changbin Zhang;Hong He;Y. Teraoka
通讯作者：
Li Xue;Changbin Zhang;Hong He;Y. Teraoka
影响因子：
5.3
作者：
Azhar Uddin;Toru Yamada;Ryota Ochiai;E. Sasaoka;Shengji Wu
通讯作者：
Azhar Uddin;Toru Yamada;Ryota Ochiai;E. Sasaoka;Shengji Wu
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
影响因子：
8.8
作者：
Jurng, J;Lee, TG;Seier, J
通讯作者：
Seier, J
影响因子：
3.7
作者：
Liu, Yue;Wang, Yuejun;Wu, Zhongbiao
通讯作者：
Wu, Zhongbiao