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.
HONEYCOMB CATALYST STRUCTURE AND SCR DEVICE
WABENKATALYSATORSTRUKTUR UND SCR-VORRICHTUNG
STRUCTURE DE CATALYSEUR EN NID D'ABEILLES ET DISPOSITIF SCR
2023-08-23
Patent
Elektronische Ressource
Englisch
IPC: | B01J Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie , CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY / B01D SEPARATION , Trennen / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein |
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