Catalysis Letters

, Volume 106, Issue 3–4, pp 183–193

Preparation and Pretreatment Temperature Influence on Iron Species Distribution and N2O Decomposition in Fe–ZSM-5

  • K. Krishna
  • M. Makkee

DOI: 10.1007/s10562-005-9628-y

Cite this article as:
Krishna, K. & Makkee, M. Catal Lett (2006) 106: 183. doi:10.1007/s10562-005-9628-y


Fe–ZSM-5 catalysts are prepared by FeCl3 sublimation between 320 and 850 °C. The catalysts are characterised by XRD, H2–TPR, NH3–TPD, NO adsorption by DRIFTs, and catalytic activity is evaluated for N2O decomposition. The influence of high temperature (850 °C) and pretreatment environment (air, He, He+H2O and H2) on the nature of iron species in Fe–ZSM-5 is further investigated by DRIFTs. High temperature FeCl3 sublimation results in decreased FeOx formation, easily reducible and narrow distribution of iron species in close proximity to alumina in Fe–ZSM-5. High temperature FeCl3 sublimation or pretreatment results in isolated hydroxylated iron species, –Fe(OH)2, which are not significant in Fe–ZSM-5 prepared by 320 °C FeCl3 sublimation followed by calcination below 600 °C. Fe–ZSM-5 prepared by high temperature FeCl3 sublimation show high N2O decomposition activity and the improved performance can be correlated to –Fe(OH)2 species in close proximity to alumina.


Fe–ZSM-5 sublimation high temperature pretreatment isolated iron species hydroxylated iron species –Fe(OH)2 N2O decomposition DRIFTs 

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • K. Krishna
    • 1
  • M. Makkee
    • 1
  1. 1.Reactor & Catalysis Engineering, DelftChemTechDelft University of TechnologyDelftThe Netherlands

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