Patent ID: 8501132

Claim:
A process for reducing nitrogen oxides in a waste stream by: contacting the waste stream with a catalyst, wherein the catalyst includes: (A) a nanocomposite particle, the nanocomposite particle comprising: (i) predominantly anatase titanium dioxide nanoparticles; (ii) metal oxide nanoparticles selected from the group consisting of zirconium dioxide, cerium dioxide, hafnium oxide, tin oxide, niobium oxide, tantalum oxide, and combinations thereof; and (iii) a surface stabilizer selected from the group consisting of silicon dioxide, aluminum oxide, phosphorus pentoxide, aluminum silicate and aluminum phosphate, and combinations thereof; and (B) at least one metal component comprising a metal selected from the group consisting of platinum, gold, silver, palladium, copper, tungsten, molybdenum, vanadium, iron, rhodium, nickel, manganese, chromium, cobalt, ruthenium, and combinations thereof.