Effect of preparation method on iron-containing AlPO-5 for selective catalytic reduction of N2O with methane in the presence of steam

Selective catalytic reduction (SCR) of N2O with methane in the presence of steam has been investigated over iron-containing AlPO-5 that is prepared by isomorphous substitution and impregnation, respectively. Characterization results indicate that AlPO-5 zeolite has good capacity to resist steam. FeAlPO-5 has better low-temperature activity and is more stable than Fe/AlPO-5 due to its high population of isolated Fe(III) and oligonuclear Fe(III)xOy. The deactivation of Fe/AlPO-5 is ascribed to agglomeration of Fe2O3 particles under steam condition.