FeOx/ZrO2 samples, prepared by impregnation with Fe(NO3)3, were characterised by means of DRS, XRD, FTIR, redox cycles and volumetric CO adsorption. Volumetric CO adsorption, combined with FTIR, showed that 45% of iron in the sample containing 2.8 Fe atoms nm.2 was capable of forming iron carbonyls. DRS evidenced Fe2O3 on samples with Fe-content 2.8 atoms nm.2. The selective catalytic reduction of NO with C3H6 in the presence of O2 was studied with a reactant mixture containing NO = 4000 ppm, C3H6 = 4000 ppm, O2 = 2%. The dependence on iron-content suggests that only isolated iron, prevailing in dilute FeOx/ZrO2, is active for NO reduction, whereas iron on the surface of small oxide particles, prevailing in concentrated FeOx/ZrO2, is active for C3H6 combustion.
Tuti, S., Pepe, F., Pietrogiacomi, D., Indovina, V. (2002). The catalytic activity of FeOx/ZrO2 for the abatement of NO with propene in the presence of O2. CATALYSIS TODAY, 75(1-4), 373-378 [10.1016/S5861(02)00068-8].
The catalytic activity of FeOx/ZrO2 for the abatement of NO with propene in the presence of O2
TUTI, SIMONETTA;
2002-01-01
Abstract
FeOx/ZrO2 samples, prepared by impregnation with Fe(NO3)3, were characterised by means of DRS, XRD, FTIR, redox cycles and volumetric CO adsorption. Volumetric CO adsorption, combined with FTIR, showed that 45% of iron in the sample containing 2.8 Fe atoms nm.2 was capable of forming iron carbonyls. DRS evidenced Fe2O3 on samples with Fe-content 2.8 atoms nm.2. The selective catalytic reduction of NO with C3H6 in the presence of O2 was studied with a reactant mixture containing NO = 4000 ppm, C3H6 = 4000 ppm, O2 = 2%. The dependence on iron-content suggests that only isolated iron, prevailing in dilute FeOx/ZrO2, is active for NO reduction, whereas iron on the surface of small oxide particles, prevailing in concentrated FeOx/ZrO2, is active for C3H6 combustion.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
