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 FeIII 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 FeIII 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 FeIII species caused by the Li+ cations.