CATALYST FOR EXHAUST GAS TREATMENT, EXHAUST GAS TREATMENT DEVICE AND MANUFACTURING METHOD OF CATALYST FOR EXHAUST GAS TREATMENT

• Main Authors: FUJII HIDEJI, NISHIZAWA KAZUKI, KATSUKI MASATOSHI, NASU YUSAKU, UJIHARA YUUKO
• Format: Patent
• Language: English; Japanese
• Published: 26.10.2017
• 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 for exhaust gas treatment capable of suppressing cost while having sufficient activity for purifying harmful substances, an exhaust gas treatment device and a manufacturing method of the catalyst for exhaust gas treatment.SOLUTION: A catalyst for exhaust gas treatment for purifying harmful substances contained in exhaust gas contains a perovskite-type structure represented by the general formula ABO, where metal elements of an A site are 2 or more kinds of elements containing La and Sr and metal elements of a B site are one or more kind of element containing Mn, and Ag with molar ratio of the Al to the perovskite-type structure of 0.05 to 0.2 and the Ag is carried on the perovskite-type structure.SELECTED DRAWING: Figure 5 【課題】有害物質を浄化するための十分な活性を有しながらコストを抑制し得る排ガス処理用触媒及び排ガス処理装置、並びに排ガス処理用触媒の製造方法を提供する。【解決手段】排ガスに含まれる有害物質を浄化するための排ガス処理用触媒は、一般式ＡＢＯ３で表されるペロブスカイト型構造において、Ａサイトの金属元素がＬａ及びＳｒを含む二種以上の元素であり、Ｂサイトの金属元素がＭｎを含む一種以上の元素であるペロブスカイト複合酸化物と、Ａｇとを含有し、前記ペロブスカイト複合酸化物に対する前記Ａｇのモル比が０．０５以上０．２以下であって、前記Ａｇが前記ペロブスカイト複合酸化物上に担持されていることを特徴とする。【選択図】 図５