CATALYST MATERIAL

• Main Authors: FUJITA NAOTO, TRAN MAI HUONG, AONO NORIHIKO, SATSUMA ATSUSHI, NARITA KEIICHI
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2020
• 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

To provide an exhaust gas clarifying catalyst that is chemically stable and excellent in methane clarifying performance.SOLUTION: There is provided a catalyst material 30 to be used for clarifying methane. The catalyst material 30 includes a carrier 32 made of alumina and a catalyst 34 made of at least one of palladium and a palladium oxide and directly carried by the carrier 32. The carrier 32 has a specific surface area of 20 m2/g or more and 90 m2/g or less. In a preferable embodiment, Pd (100) and PdO (101) occupies 20% or more of the crystal plane of the catalyst 34 in the joint area between the catalyst 34 and the carrier 32.SELECTED DRAWING: Figure 1 【課題】化学的に安定なメタンの浄化性能に優れた排ガス浄化用触媒を提供する。【解決手段】本発明によってメタンの浄化に用いられる触媒材料３０が提供される。この触媒材料３０は、アルミナからなる担体３２と、担体３２に直接担持されたパラジウムおよびパラジウム酸化物の少なくとも一つからなる触媒３４と、を含む。そして担体３２の比表面積は、２０ｍ２／ｇ以上９０ｍ２／ｇ以下である。好適な態様において、触媒３４と担体３２との接合面における触媒３４の結晶面のうち、Ｐｄ（１００）およびＰｄＯ（１０１）が占める割合は、２０個数％以上である。【選択図】図１