허니콤 촉매 구조체 및 SCR 장치

• Main Authors: INABA TOSHIHARU, HATTORI NOZOMU, OHARA KOUSUKE
• Format: Patent
• Language: Korean
• Published: 03.08.2023
• 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; MARINE PROPULSION OR STEERING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RELATED EQUIPMENT; SEPARATION; SHIPS OR OTHER WATERBORNE VESSELS; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

선박용 디젤 엔진의 진동에 의해 손상을 받지 않고, 높은 신뢰성을 가질 뿐만 아니라, 셀 수를 늘려도 압력 손실이 증대하기 어려운 허니콤 촉매 구조체의 제공을 과제로 하고, 이 과제는, 일측 단면으로부터 타측 단면으로 연장되어 설치된 복수의 셀(13)이 셀벽에 의해 구획된 형상의 메탈 허니콤 유닛(10)에 SCR 촉매가 담지된 선박용 엔진의 배기가스에 사용하는 허니콤 촉매 구조체로서, 메탈 허니콤 유닛(10)에 담지되는 SCR 촉매는 TiO2 단독으로 이루어지거나, 혹은 TiO2를 주성분으로서 V2O5, WO3, MoO3, SiO2, Al2O3 중 임의의 1종 또는 2종 이상이 혼합된 것이며, 셀(13)의 셀 밀도는 100 ~ 500 cpsi이고, 셀(13)을 통과하는 배기가스의 유속과 압력 손실의 관계로 나타낸는 직선의 기울기는 30 이상 180 이하인 선박용 엔진의 배기가스에 사용하는 허니콤 촉매 구조체에 의해 해결된다. It is an object to provide a honeycomb catalyst structure that has high reliability without being damaged by vibrations of a marine diesel engine and also in which a pressure loss is less likely to increase even if the number of cells is increased. The object is achieved by a honeycomb catalyst structure to be used for exhaust gas of a marine engine, in which an SCR catalyst is supported on a metal honeycomb unit 10 having a shape divided by cell walls into a plurality of cells 13 extending from one end face to the other end face, the SCR catalyst supported on the metal honeycomb unit 10 contains TiO2 alone, or contains TiO2 as a principal component and any one type or two or more types of V2O5, WO3, MoO3, SiO2, and Al2O3 in combination, the cell density of the cells 13 is 100 to 500 cpsi, and the slope of a straight line represented by a relationship between the flow velocity and the pressure loss of the exhaust gas passing through the cells 13 is 30 or more and 180 or less.