The catalytic activity of FeOx/ZrO2 for the abatement of NO with propene in the presence of O2 |
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Authors: | Simonetta Tuti Franco Pepe Daniela Pietrogiacomi Valerio Indovina |
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Affiliation: | a Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi Roma Tre, Via della Vasca Navale 79, 00159 Rome, Italy b Dipartimento di Chimica, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Rome, Italy |
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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. |
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Keywords: | NO abatement ZrO2 support Supported iron oxides |
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