CATALYST FOR REDUCING NOX EMISSIONS FROM A POOR BURNER EXHAUST GAS CURRENT, EMISSION TREATMENT SYSTEM FOR AN EXHAUST CURRENT, AND METHOD FOR PREPARING A CATALYST.

摘要

Catalysts, systems and methods are described to reduce NOx emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having a catalyst comprising silver on a particulate alumina support, the silver having a diameter of less than about 20 nm. Methods of manufacturing catalysts are described in which ionic silver is impregnated on particulate hydroxylated alumina particles.