Intrinsic properties of noble metal in catalytic selective reduction of no by propene in lean burn conditions

Anne Giroir-Fendler1, Helleh Saadallah1, Adela Haleta2

1 Laboratoire d Application de la Chimie l Environnement (LACE) UMR 5634 CNRS - UCB Lyon 1 Campus de la Doua, 43 Boulevard du 11 novembre 1918 - 69622 Villeurbanne Cedex France;
2 "Gh. Asachi" Technical University of Iasi, Faculty of Industrial Chemistry, Blvd.D. Mangeron, 71A, 700050 Iasi, Romania

Abstract


A silica support was impregnated with a rhodium, palladium, iridium or platinum salt. The four catalysts were tested for the selective reduction of NO by C3H6. The results obtained showed that noble metal can reduce NO in N2O and N2 at low temperature. The most active was the platinum but the major product was nitrous oxide. Iridium, rhodium and palladium were not so active but better selectivity in N2 were obtained.

Keywords


NO SCR; metal supported catalysts; platinum; rhodium; iridium; palladium; silica

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