Effect of iron loading on the performance and structure of Fe/ZSM-5 catalyst for the selective catalytic reduction of NO with NH.

A series of Fe/ZSM-5 catalysts with different Fe contents were prepared by impregnation method. The catalysts were characterized by TEM, XRD, H temperature-programed reduction (H-TPR), temperature-programed desorption of ammonia (NH-TPD), and in situ diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), and the catalytic activity test was also carried out on selective catalytic reduction (SCR) denitration device. Results showed that the single metal iron-supported ZSM-5 catalyst has high deNO activity in the medium-high temperature range, and the optimal loading of Fe active component is 10 wt%; the deNO efficiency over 80% at the range of 350-450 °C and 431 °C reaches the maximum of 96.