A reaction mechanism is proposed for NOx reduction with alkanes over C
u/ZSM-5 in the presence of O-2. Based on FTIR and MS data obtained by
exposure of Cu/ZSM-5 to NO + O-2 and other data on the interaction of
acetone oxime impregnated Cu/ZSM-5 with isotopically labelled NO, it i
s proposed that N-N bonds are formed between adsorbed oxime and NOdelt
a+. The proposed mechanism is compared with literature data.