N2O Removal by Catalytic Decomposition and Reduction with CH4 over Fe/Al2O3

N2O removal by catalytic decomposition and reduction with CH4 over Fe/Al2O3 was investigated. The catalytic conversion of N2O to N2 over Fe/Al2O3 was effectively promoted by the addition of CH4. The activity of Fe/Al2O3 normalized on a TOF basis for N2O decomposition increased linearly with the Fe loading, whereas that for N2O reduction increased with an increase in Fe loading up to 2 wt %, then subsequently decreased. Structural characterization by UV-vis and TPR revealed the presence of two types of Fe species, Fe2O3 and FeAlO3, in Fe/Al2O3. It was proposed that the catalytically active species for N2O decomposition and N2O reduction are Fe2O3 and FeAlO3, respectively.