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Preparation and Characterization of Manganese-Based Catalysts for Removing NO Under Low Temperatures

  • Kaijie Liu
  • Qingbo YuEmail author
  • Junbo San
  • Zhicheng Han
  • Qin Qin
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Selective catalytic reduction of NOx with loaded urea (urea-SCR) is a promising technology to remove NOx from the low-temperature metallurgical sintering flue gas. In present work, a series of nutshell-based activated carbon (nu-AC) supported MnOx catalysts with loading urea were synthesized by ultrasound-assisted impregnation, and the physicochemical properties of catalysts were detected by XRD, SEM, EDS, GFAAS, BET, and XPS. Besides, NO adsorption capacity and the influences of reaction temperature, activated carbon particle size, metal oxides loading, and urea loading on catalytic activity were studied through experiment. The results of NO adsorption tests show that the adsorption capacity of nu-AC is limited, and the adsorption capacity decreases with increasing temperature. Catalytic performance test results indicate that the catalyst with 12% MnOx and 6% urea shows the best performance, giving nearly 90% NO conversion at 50 °C. Finally, the reaction mechanism of low-temperature urea-SCR for manganese-based catalyst was discussed.

Keywords

Selective catalytic reduction Activated carbon Low temperature Nitrogen oxide 

Notes

Acknowledgements

The authors wish to acknowledge financial support from the National Key Research and Development Program of China (2017YFB0603603), the Fundamental Research Funds for the Central Universities (N162504012), and the National Natural Science Foundation of China (51576035, 51304048).

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Kaijie Liu
    • 1
  • Qingbo Yu
    • 1
    Email author
  • Junbo San
    • 1
  • Zhicheng Han
    • 1
  • Qin Qin
    • 1
  1. 1.School of MetallurgyNortheastern UniversityShenyangPeople’s Republic of China

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