Catalysis Letters, Vol.121, No.1-2, 111-117, 2008
Selective catalytic reduction of nitric oxide with ammonia over ZSM-5 based catalysts for diesel engine applications
Fe/ZSM-5 and Cu-ZSM-5 were investigated for selective catalytic reduction of NOx with ammonia. The Fe/ZSM-5 catalyst showed over 90% NO conversion from 350 to 500 degrees C and Cu-ZSM-5 showed over 90% NO conversion from 250 to 350 degrees C. After pretreatment in 10% H2O at 700 degrees C, the Fe/ZSM-5 still exhibited high activities and stability. On the basis of the experiments, Fe/ZSM-5 and Cu-ZSM-5 seem to be promising candidates for diesel-engine NOx emission control.