Simultaneous removal of NO and Hg0 using Fe and Co co-doped Mn-Ce/TiO2 catalysts

FUEL

卷:224

Article

Shen, Boxiong¹  Zhu, Shaowen²  Zhang, Xiao¹  Chi, Guilong¹  Patel, Dipesh³  Si, Meng¹  Wu, Chunfei^1,3 

[1] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin, Peoples R China

[2] Nankai Univ, Coll Environm Sci & Engn, Tianjin, Peoples R China

[3] Univ Hull, Sch Engn & Comp Sci, Kingston Upon Hull HU6 7RX, N Humberside, England

关键词: Simultaneous removal;    Nitric oxide;    Elemental mercury;    Fe-Co;   

DOI  :  10.1016/j.fuel.2018.03.080

来源: Elsevier

【 摘 要 】

Fe and Co co-doped Mn-Ce/TiO2 (MCT) catalysts were investigated for the simultaneous removal of nitric oxide ( NO) and elemental mercury (Hg-0) at reaction temperature lower than 200 degrees C. The catalysts were characterized by Brunauer-Emmett-Teller ( BET), temperature program reduction (TPR), scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. The experimental results showed that the co-doped 2Fe4Co-MCT catalyst exhibited better performance for the simultaneous removal of NO and Hg-0 compared to Fe or Co doped catalysts. This could be due to higher BET surface area and better redox property of 2Fe4Co-MCT catalyst. In addition, we propose that chemisorbed O-2 played a dominant role in selective catalytic reduction (SCR) of NO while lattice O-2 played a key role in Hg-0 oxidation. The results also indicate that the introduction of Fe species enhanced the activity of SCR, whereas the introduction of Co species enhanced the oxidation of Hg-0. The synergistic effect of Fe and Co species in the 2Fe4Co-MCT catalyst are also suggested to be an important mechanism for simultaneously removing NO and Hg-0.

【 授权许可】

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