Kinetics and Catalysis

, Volume 57, Issue 2, pp 255–262 | Cite as

Effect of the oxidation state of manganese in the manganese oxides used in the synthesis of Mn-substituted cordierite on the properties of the product

  • E. F. SutorminaEmail author
  • L. A. Isupova
  • L. M. Plyasova
  • L. S. Dovlitova
  • N. A. Rudina
  • V. A. Rogov


Catalysts based on Mn-substituted cordierite 2MnO · 2Al2O3 · 5SiO2 have been synthesized using different manganese oxides (MnO, Mn2O3, and MnO2) at a calcination temperature of 1100°C. The catalysts differ in their physicochemical properties, namely, phase composition (cordierite content and crystallinity), manganese oxide distribution and dispersion, texture, and activity in high-temperature ammonia oxidation. The synthesis involving MnO yields Mn-substituted cordierite with a defective structure, because greater part of the manganese cations is not incorporated in this structure and is encapsulated and the surface contains a small amount of manganese oxides. This catalyst shows the lowest ammonia oxidation activity. The catalysts prepared using Mn2O3 or MnO2 are well-crystallized Mn-substituted cordierite whose surface contains different amounts of manganese oxides differing in their particle size. They ensure a high nitrogen oxides yield in a wide temperature range. The product yield increases with an increasing surface concentration of Mn3+ cations. The highest NO x yield (about 76% at 800–850°C) is observed for the MnO2-based catalyst, whose surface contains the largest amount of manganese oxides.


Mn-substituted cordierite manganese oxides ammonia oxidation catalysts 


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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • E. F. Sutormina
    • 1
    Email author
  • L. A. Isupova
    • 1
  • L. M. Plyasova
    • 1
  • L. S. Dovlitova
    • 1
  • N. A. Rudina
    • 1
  • V. A. Rogov
    • 1
    • 2
  1. 1.Boreskov Institute of Catalysis, Siberian BranchRussian Academy of SciencesNovosibirskRussia
  2. 2.Novosibirsk State UniversityNovosibirskRussia

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