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Effect of flue gas components on the NO removal and element mercury oxidation performance of Mn-modified low-temperature catalyst

  • Guangwei Shi , Meng Liu EMAIL logo , Yufeng Duan , Peng Hu , Tao Li and Yinsheng Li
Published/Copyright: June 28, 2021
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International Journal of Chemical Reactor Engineering
From the journal International Journal of Chemical Reactor Engineering Volume 19 Issue 10

Abstract

The development of a low-temperature water and sulfur-resistant catalyst with high efficiency of NO removal and element mercury Hg(0) oxidation performance is one of the main directions for the synergistic removal of multiple pollutants from flue gas. The transition metal Mn is used to modify the V-W/Ti catalyst to prepare a modified Mn-SCR catalyst. The effects of Mn loading and complex flue gas components (SO2, H2O and HCl) on the modified catalysts activity were investigated on a small fixed-bed experimental bench, respectively. As the Mn loading increases, the acid sites on the catalyst surface are significantly enhanced, the window of NO removal temperature is significantly widened, and the Hg(0) oxidation performance is nearly 100%. The optimal loading amount of Mn is 0.2(Mn/Ti, mol). When the Mn loading exceeds 0.2, the particles on the catalyst surface sinter, and the specific surface area decreases. However, little difference is observed in catalyst activity. When SO2 and H2O are present in the flue gas, dual-action catalyst activity can be significantly suppressed, but the effect of H2O on catalyst activity is greater than that of SO2. With the increase of the HCl concentration from 0 ppm to 50 ppm, the oxidation efficiency of Hg(0) and the removal efficiency of NO increased slightly.

Keywords: catalyst; gas components; mercury oxidation; Mn loading; NO removal
Corresponding author: Meng Liu, Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China, E-mail:

Funding source: National Key R&D Program of China

Award Identifier / Grant number: 2016YFB0600604-02

Funding source: Transformation of Scientific Achievements in Jiangsu Province

Award Identifier / Grant number: SBA2018020041

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This project was financially supported by the National Key R&D Program of China (2016YFB0600604-02) and the Special Funds for Transformation of Scientific Achievements in Jiangsu Province (SBA2018020041).

  3. Conflict of interest statement: The authors declare no competing financial interest.

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Received: 2021-03-09
Accepted: 2021-06-16
Published Online: 2021-06-28

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ijcre-2021-0051
Keywords for this article
catalyst; gas components; mercury oxidation; Mn loading; NO removal

Articles in the same Issue

  1. Frontmatter
  2. Review
  3. Nanoreactors: properties, applications and characterization
  4. Articles
  5. Numerical simulation of the particle-wall collision strength and swirling effect on the performance of the axial flow cyclone separator
  6. Development and experimental validation of reactor kinetic model for catalytic cracking of eugenol, a potential bio additive fuel blend
  7. Effect of flue gas components on the NO removal and element mercury oxidation performance of Mn-modified low-temperature catalyst
  8. CFD analysis and RSM optimization of obstacle layout in Tesla micromixer
  9. Non-invasive morphological characterization of cellular loofa sponges using digital microscopy and micro-CT
  10. Residence time distribution studies on recycle reactor with recirculation
  11. The influence of membrane electrode assembly’s pressing on PEM fuel cell’s performance
  12. Oxidative hydrolysis of Fe(Ⅱ) in the process of hydrothermal synthesis of hematite
  13. Parametric numerical study and optimization of mass transfer and bubble size distribution in a gas-liquid stirred tank bioreactor equipped with Rushton turbine using computational fluid dynamics
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