CATALYST DEVICE, METHOD AND APPARATUS FOR MANUFACTURING CATALYST DEVICE

• Main Authors: OHARA KOSUKE, HATTORI NOZOMI
• Format: Patent
• Language: English; Japanese
• Published: 21.09.2017
• 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

PROBLEM TO BE SOLVED: To provide a catalyst device which can sufficiently reduce NOand oxide ammonia and in which amount of use of an oxidation catalyst is reduced.SOLUTION: The catalyst device comprises: a structure which is mainly composed of a first catalyst containing at least one of vanadium oxide and tungsten oxide and has a plurality of through-holes extending in one direction to form a gas flow passage; and a plurality of particles of a size of 20 nm or less mainly composed of a second catalyst containing a noble metal, the particles being arranged along an inner wall of the structure partitioning the through-holes in at least part of a range in the longitudinal direction of the structure. The amount of the particles has a particle amount gradient continuously increasing in the longitudinal direction.SELECTED DRAWING: Figure 1 【課題】ＮＯＸの還元およびアンモニアの酸化を十分に行うことができ、酸化触媒の使用量が低減された触媒装置を提供する触媒装置触媒装置を提供する。【解決手段】触媒装置は、酸化バナジウムおよび酸化タングステンの少なくとも一方を含む第１の触媒から主に構成され、気体の流路を形成するよう一方向に延びた複数の貫通孔を有する構造体と、前記構造体の少なくとも一部の長手方向領域に、前記貫通孔を画定する前記構造体の内壁に沿って配置された複数の粒子であって、貴金属を含む第２の触媒から主に構成され、サイズが２０ｎｍ以下である複数の粒子と、を備え、前記粒子の量が前記長手方向に連続的に増大した粒子量勾配を有していることを特徴とする。【選択図】図１