Patent ID: 7597865
Filing Date: 2009-10-06
Classification: B01D,B01J,F01N,Y02T

Abstract:
1. A nitrogen oxide removal catalyst system, comprising a first reaction part for denitrating nitrogen oxides by reacting said nitrogen oxide with ammonia, being provided with a first catalyst containing, as active constituents, at least: a complex oxide comprising two or more oxides selected from silica, alumina, titania, zirconia, and tungsten oxide; a rare earth metal or a transition metal (except Cu, Co, Ni, Mn, Cr, and V); and sulfur or phosphorus; and a second reaction part for oxidatively decomposing ammonia that has leaked from the first reaction part, being provided with a second catalyst containing, as active constituents, at least: a noble metal and a silica-alumina type complex oxide.