CATALYST SYSTEM FOR REMOVING NITROGEN OXIDE AND METHOD FOR REMOVING NITROGEN OXIDE

• Main Authors: KUMAGAI, TAKAYUKI, IWAMI, NOBUYA, HIRATA, KIMINOBU, KANAYA, ISAMU, MORI, TAKAYUKI, UENO, HIROKI
• Format: Patent
• Language: English; French; Japanese
• Published: 09.09.2005
• Edition: 7
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

Disclosed is a catalyst system comprising a first reaction unit which is loaded with a first catalyst containing, as active constituents, a composite oxide composed of two or more oxides selected from silica, alumina, titania, zirconia and tungsten oxide, and a rare earth metal or a transition metal (excluding Cu, Co, Ni, Mn, Cr and V), and a second reaction unit which is loaded with a second catalyst containing, as active constituents, a noble metal and a silica-alumina composite oxide. Il est divulgué un système de catalyseur comprenant une première unité de réaction qui est chargé d'un premier catalyseur contenant en tant que constituants actifs, un oxyde composite constitué de deux ou plus d'oxydes sélectionnés parmi le silice, l'alumine, le zirconium et l'oxyde de tungstène et un métal des terres rares ou un métal de transition (à l'exclusion de Cu, Co, Ni, Mn, Cr et V), et une seconde unité de réaction qui est chargée d'un second catalyseur ayant comme constituant actif, un métal nombre et un oxyde composite silice-alumine.