Synergic Co-Ag effect during the NOx SCR with butane and toluene

S. ASPROMONTE; R. SERRA; F. SCHNEEBERGER; E. MIRÓ; A. BOIX

Munich

Congreso; 15th International Congress on Catalysis, ICC 2012; 2012

15th International Congress on Catalysis

Currently, NOx emission standards are met by the well-known three-way catalytic converters for gasoline-fuelled car engines. However, for diesel engines or gasoline engines operating under lean burn conditions, such catalysts cannot be applied because of the predominant direct oxidation of the reductants and a fast catalyst deactivation. There has been much effort to develop alternative catalysts, in particular zeolites modified with various redox components (transition and/or precious metals) have been investigated [1-6]. However, there is no broad commercial application of such catalysts up to date because of their insufficient activity and stability in the presence of relevant concentrations of water vapour in the exhaust gas. The purpose of this work is to study the behavior of Co and Ag exchanged on Na-Mordenite catalysts in the Selective Catalytic Reduction of NOx using either butane as a saturated short HC or toluene, representative of the aromatic family.