| abstract |
CATALYST AND METHOD FOR REDUCING NITROGEN OXIDES IN EXHAUST FLOWS WITH HYDROCARBONS OR ALCOHOLS. Catalytic system and a method of reducing nitrogen oxides in an exhaust gas by reduction with a hydrocarbon reducing agent and oxygen-containing organic compounds are provided. The catalytic system contains a silver catalyst and a modifying catalyst, where the modifying catalyst contains a modifying oxide. where the modifying oxide is selected from the group consisting of iron oxide, cerium oxide, copper oxide, manganese oxide, chromium oxide, lanthanide oxide, actinide oxide, molybdenum oxide, tin oxide, oxide indium, rhenium oxide, tantalum oxide, osmium oxide, barium oxide, calcium oxide, strontium oxide, potassium oxide, vanadium oxide, nickel oxide, tungsten oxide, and mixtures thereof, The modifying oxide is supported on an inorganic oxide support or supports where at least one of the inorganic oxide supports is an acid support. The catalyst of the silver catalyst and modifier catalyst provides higher NO ~ conversions than silver catalyst or modifier catalyst alone. |