Substituted ferrite MxFe1-xFe2O4 (M = Mn, Zn) catalysts for N2O catalytic decomposition processes

The N2O catalytic decomposition to N-2 and O-2 as gas products was carried out on the substituted ferrite MxFe1-xFe2O4 (M = Mn and Zn with x = 0-0.8) catalysts. The obtained results showed that the partial substitution of Fe by Mn and Zn metal transitions in Fe3O4 spinet oxide led to a significant improvement in the catalytic activity for the N2O decomposition. Moreover, the catalytic activity depended on the degree of Fe replacement by Mn or Zn. The N2O conversion reached 100% over the Mn0.8Fe0.2Fe2O4 and Zn0.6Fe0.4Fe2O4 catalysts at 250 and 280 degrees C for pure N2O, respectively. The decomposition temperatures were relatively increased after O-2 addition. (C) 2012 Elsevier B.V. All rights reserved.