Kinetics of N2O decomposition on Fe3+ supported on pure and Li-modified Al2O3

Abstract

The kinetics of N₂O decomposition on the surface of Fe³⁺ species supported on pure and Li⁺-doped Al₂O₃ have been studied. The supported Fe^III species cause a transformation of the rate law from zero order, followed on pure support, to first order. Moreover, it has been concluded that the relatively high activity exhibited by the supported Fe₂O₃/Al₂O₃ catalysts compared with the activity of the Fe₂O₃ and Al₂O₃ should be attributed to the increase of the specific rate constant caused by the supported Fe^III active phase. Finally, it was found that the deactivation observed after Li⁺ doping should be attributed to both the increase in the oxygen adsorptivity and the decrease in the dispersion of the supported Fe^III species caused by the Li⁺ cations.