CATALYST FOR REMOVING NITROGEN OXIDE

PURPOSE:To obtain the titled catalyst which is easy in the extrusion molding, capable of the local exchange and usable in a selective reduction method by blocking collectively the materials wherein the projected bodies for constituting the passages of an exhaust gas are formed in one body on the surface of a lamellar base material and constituting a lattice construction or the like. CONSTITUTION:A material 1 for constituting a catalyst wherein many projected streaks are formed in one body in every equal intervals on the surface of a lamellar base material having about 3mm wall thickness is obtained by extruding a clayey raw material kneaded with oxide, molding, drying and calcining it. The passing clearances 1c of an exhaust gas and the height of the projected streaks 1b are preferably about 5.0-30mm. A catalyst 2 is constituted by laminating the many constituting materials. Thereby the catalyst having the optional volume is obtained and also the catalyst for removing nitrogen oxide which is capable of the local exchange for a breakage part and is large in the reducing and purifying efficiencies and consists of ceramic material is obtained.