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)


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.


Selective catalytic reduction Activated carbon Low temperature Nitrogen oxide 



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).


  1. 1.
    Busca G, Lietti L, Ramis G, Berti F (1998) Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts: a review. Appl Catal B: Environ 18:1–36CrossRefGoogle Scholar
  2. 2.
    Hamada H (1994) Selective reduction of NO by hydrocarbons and oxygenated hydrocarbons over metal oxide catalysts. Catal Today 22:21–40CrossRefGoogle Scholar
  3. 3.
    Li JH, Chang HZ, Ma L, Hao JM, Yang RT (2011) Low-temperature selective catalytic reduction of NOx with NH3 over metal oxide and zeolite catalysts—A review. Catal Today 175:147–156CrossRefGoogle Scholar
  4. 4.
    Huang JH, Tong ZQ, Huang Y, Zhang JF (2008) Selective catalytic reduction of NO with NH3 at low temperatures over iron and manganese oxides supported on mesoporous silica. Appl Catal B: Environ 78:309–314CrossRefGoogle Scholar
  5. 5.
    Shen YS, Zhu SM, Qiu T, Shen SB (2009) A novel catalyst of CeO2/Al2O3 for selective catalytic reduction of NO by NH3. Catal Commun 11:20–23CrossRefGoogle Scholar
  6. 6.
    Samojeden B, Grzybek T (2016) The influence of the promotion of N-modified activated carbon with iron on NO removal by NH3-SCR. Energy 116:1484–1491CrossRefGoogle Scholar
  7. 7.
    Li SJ, Wang XX, Tan S, Shi Y, Li W (2017) CrO3 supported on sargassum-based activated carbon as low temperature catalysts for the selective catalytic reduction of NO with NH3. Fuel 191:511–517CrossRefGoogle Scholar
  8. 8.
    Liang Z, Ma X, Lin H, Tang Y (2011) The energy consumption and environmental impacts of SCR technology in China. Appl. Energy 88:1120–1129CrossRefGoogle Scholar
  9. 9.
    Seker E, Gulari E, Hammerle RH, Lambert C, Leerat J, Osuwan S (2002) NO reduction by urea under lean conditions over alumina supported catalysts. Appl Catal A: Gen 226:183–192CrossRefGoogle Scholar
  10. 10.
    Held W, König A, Richter T, Puppe L (1990) Catalytic NOx reduction in net oxidizing exhaust gas. SAE Tech. Pap. 900496Google Scholar
  11. 11.
    Koebel M, Elsener AM, Madia G (2001) Reaction pathways in the selective catalytic reduction process with NO and NO2 at low temperatures. Ind Eng Chem Res 40:52–59CrossRefGoogle Scholar
  12. 12.
    Kašpar J, Fornasiero P, Hickey N (2003) Automotive catalytic converters: current status and some perspectives. Catal Today 77:419–449CrossRefGoogle Scholar
  13. 13.
    Zeng Z, Lu P, Li CT, Zeng GM, Jiang X (2012) Reaction of NO at low temperature by ACF loading urea and rare-earth element oxides (La2O3, CeO2). J Coord Chem 65:1992–1998CrossRefGoogle Scholar
  14. 14.
    Wang Z, Wang YL, Long DH, Mochida I, Qiao WM, Zhan L, Liu XJ, Yoon SH, Ling LC (2011) Kinetics and mechanism study of low-temperature selective catalytic reduction of NO with urea supported on pitch-based spherical activated carbon. Ind Eng Chem Res 50:6017–6027CrossRefGoogle Scholar
  15. 15.
    Yao R (2015) Study of modified activated carbon on catalytic oxidation of NO in low temperature. Master Thesis, East China University of Science and Technology, ShanghaiGoogle Scholar
  16. 16.
    Shirahama N, Mochida I, Korai Y, Choi KH, Enjoji T, Shimohara T, Yasutake A (2004) Reaction of NO2 in air at room temperature with urea supported on pitch based activated carbon fiber. Appl Catal B: Environ 52:173–179CrossRefGoogle Scholar
  17. 17.
    Lee SM, Park KH, Hong SC (2012) MnOx/CeO2-TiO2 mixed oxide catalysts for the selective catalytic reduction of NO with NH3 at low temperature. Chem Eng J 195–196:323–331CrossRefGoogle Scholar

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

Personalised recommendations