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

Shen, Boxiong; Zhu, Shaowen; Zhang, Xiao; Chi, Guilong; Patel, Dipesh; Si, Meng; Wu, Chunfei

Abstract

Fe and Co co-doped Mn-Ce/TiO2 (MCT) catalysts were investigated for the simultaneous removal of nitric oxide (NO) and elemental mercury (Hg0) 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 Hg0 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 Hg0 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 Hg0. 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 Hg0.

Citation

Shen, B., Zhu, S., Zhang, X., Chi, G., Patel, D., Si, M., & Wu, C. (2018). Simultaneous removal of NO and Hg⁰ using Fe and Co co-doped Mn-Ce/TiO₂ catalysts. Fuel, 224, 241-249. https://doi.org/10.1016/j.fuel.2018.03.080

• Journal Article Type: Article
• Acceptance Date: Mar 13, 2018
• Online Publication Date: Mar 20, 2018
• Publication Date: Jul 15, 2018
• Deposit Date: Jun 6, 2018
• Publicly Available Date: Mar 21, 2019
• Journal: Fuel
• Print ISSN: 0016-2361
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 224
• Pages: 241-249
• DOI: https://doi.org/10.1016/j.fuel.2018.03.080
• Keywords: Simultaneous removal; Nitric oxide; Elemental mercury; Fe–Co
• Public URL: https://hull-repository.worktribe.com/output/865045
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0016236118304885?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Simultaneous removal of NO and Hg0 using Fe and Co co-doped Mn-Ce/TiO2 catalysts; Journal Title: Fuel; CrossRef DOI link to publisher maintained version: http://dx.doi.org/10.1016/j.fuel.2018.03.080; Content Type: article; Copyright: © 2018 Elsevier Ltd. All rights reserved.