Simultaneous removal of NO and Hg0 using Fe and Co co-doped Mn-Ce/TiO2 catalysts. (15th July 2018)

• Record Type: Journal Article
• Authors: Shen, Boxiong; Zhu, Shaowen; Zhang, Xiao; Chi, Guilong; Patel, Dipesh; Si, Meng; Wu, Chunfei
• Is Part Of: Fuel. Volume 224(2018)
• Page Start: 241
• Page End: 249
• Publication Date: 2018-07-15
• Subjects: Simultaneous removal -- Nitric oxide -- Elemental mercury -- Fe–Co; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.03.080
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: 2Fe4Co-MCT was best for simultaneous removal of NO and Hg 0 . Fe contributed more to the removal of NO. Co enhanced the oxidation of Hg 0 . Chemisorbed O2 was important for SCR. Lattice oxygen played a key role in Hg 0 removal. Abstract: 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 °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 O2 played a dominant role in selective catalytic reduction (SCR) of NO while lattice O2 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 .