TY - JOUR ID - 3785 TI - Pd/LaxSr1-xFeO3 perovskite nanocatalysts for selective catalytic reduction of NOx by hydrogen JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Nemati, A. AU - Khodadadi, A.A. AU - Mortazavi, Y. AU - Alinezhadchamazketi, A. AD - Catalysis and Nanostructured Materials Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran Y1 - 2015 PY - 2015 VL - 22 IS - 6 SP - 2341 EP - 2349 KW - Hydrogen KW - NO KW - Palladium KW - perovskite KW - Selective Catalytic Reduction DO - N2 - In this study, LaxSr1-xFeO3 (x = 0, 0.8) perovskite-type catalysts were prepared by gel combustion method and then 1.0 wt% palladium was loaded on them by a dry impregnation. The catalysts were characterized by XRD, SEM, H2-TPR, O2-TPD, NO-TPD and BET surface area techniques.H2-TPR profiles of the Pd/perovskite catalyst shows the reduction of Pd at around 140˚C which facilitates the reduction of NO in the H2-SCR. TPD results reveal that the substitution of Sr in the perovskites structure remarkably decreases the oxygen mobility and increases the NO adsorption. The H2-SCR of NO on the catalysts was performed in a temperature-programmed reaction apparatus in the presence of oxygen.The effect of carbon monoxide in the feed on H2-SCR was also investigated. The PLSFOcatalyst (1.0 wt% Pd/La0.8Sr0.2FeO3 shows the highest NO conversion and N2 selectivity at a moderate temperature of 190oC. UR - https://scientiairanica.sharif.edu/article_3785.html L1 - https://scientiairanica.sharif.edu/article_3785_1aecec643c5c6ee5609ee674cc2b221c.pdf ER -