Catalytic Properties of the Fe₂O₃MnO System
for Ammonia Oxidation

N. I. Zakharchenko

Zhukovskii State Aerospace University, Kharkov, Ukraine

Received May 5, 2000

Abstract—The effect of the chemical and phase composition of the Fe₂O₃–MnO catalytic system for ammonia
oxidation on its activity and selectivity to NO at 873–1273 K is demonstrated. The optimal parameters of the
process over manganese ferrite, the most active and highly selective component of the system, are determined.
The combination of the factors of chemical and phase transformations of the catalyst results in the formation
of an inactive component (Fe₃O₄) and in the structural changes (recrystallization and cationic redistribution of
spinel) and is the reason for the deactivation of manganese ferrite at 1273 K.

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