Abstract: Fe-substituted AlPO-5 zeolite (FeAlPO-5 catalyst) samples with different Fe contents were prepared by the hydrothermal method and used in catalytic reduction of N₂O with CH₄, exhibiting good low-temperature activity. The AlPO-5 and FeAlPO-5 samples were characterized by N₂ physisorption, X-ray diffraction, and UV-visible spectroscopy. The results showed that the FeAlPO-5 samples had the typical structure as that of AlPO-5 zeolite. The Fe content had strong influence on the catalyst activity and the distribution of Fe species. The 2.4% FeAlPO-5 catalyst contained not only isolated Fe^III and oligonuclear Fe^III, being active for catalytic reduction of N₂O with CH₄, but also a considerable nanosized Fe^III, being responsible for N₂O decomposition.

Key words: iron, AlPO-5 zeolite, methane, catalytic reduction, nitrous oxide