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公开(公告)号：EP3991844A1
公开(公告)日：2022-05-04
申请号：EP20831269.4
申请日：2020-06-17
发明人： IWATA, Kana , ITOU, Minoru , YOSHIDA, Takeru , KAKINOHANA, Masaru , SUZUKI, Hiromasa , TANAKA, Atsushi
摘要： An exhaust gas purification catalyst apparatus 100 has a honeycomb base material and a catalyst noble metal supported by the honeycomb base material, wherein: the honeycomb base material contains ceria-zirconia composite oxide particles as one of the constituent materials, is of a wall flow type, and includes inlet-side cells 21 and outlet-side cells 22 demarcated by porous partition walls 10; the catalyst noble metal is supported in inlet-side support regions 30 and outlet-side support regions 40; each of the inlet-side support regions 30 is formed with a specific length 31 from the exhaust gas flow upstream end; the catalyst noble metal 70% support depth is not greater than 50% of the thickness of the porous partition walls 10; each of the outlet-side support regions 40 is formed with a specific length 41 from the exhaust gas flow downstream end; and the catalyst noble metal 70% support depth is greater than 50% of the thickness of the porous partition walls 10.
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公开(公告)号：EP3970855A1
公开(公告)日：2022-03-23
申请号：EP20805155.7
申请日：2020-05-11
发明人： IWATA, Kana , ITOU, Minoru , OHISHI, Shunsuke , YOSHIDA, Takeru , SUZUKI, Hiromasa , KAKINOHANA, Masaru , KAMITANI, Satoshi
摘要： An exhaust gas purification catalyst device having a substrate and one or more catalytic noble metals supported on the substrate. The substrate has a plurality of cells partitioned by a porous wall 1 and includes ceria-zirconia compound oxide particles. A specific noble metal that is one of the one or more catalytic noble metals satisfies both the following requirements (1) and (2): (1) the noble metal 50% support depth for the specific noble metal is 30% or less of the distance from the surface of the porous wall 1 to the center of the interior of the porous wall 1, and (2) the noble metal 90% support depth for the specific noble metal is 35% or more of the distance from the surface of the porous wall 1 to the center of the interior of the porous wall 1.
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公开(公告)号：EP3970854A1
公开(公告)日：2022-03-23
申请号：EP20805060.9
申请日：2020-05-11
发明人： IWATA, Kana , ITOU, Minoru , OHISHI, Shunsuke , YOSHIDA, Takeru , KAKINOHANA, Masaru , KAMITANI, Satoshi , SUZUKI, Hiromasa
摘要： This exhaust gas purification catalytic device 100 includes: a substrate 10; at least one type of noble-metal catalyst PGM that is supported on the substrate 10; and a coating layer 15 on the surface of the substrate 10. The substrate 10 includes a plurality of cells 12 which are demarcated by porous walls 11. The substrate 10 and the coating layer 15 each include ceria-zirconia composite oxide particles CZ.
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公开(公告)号：EP3730203A1
公开(公告)日：2020-10-28
申请号：EP20165524.8
申请日：2020-03-25
发明人： TOJO, Takumi , YOSHIDA, Takeru , SUZUKI, Hiromasa , ITO, Minoru , IWATA, Kana
摘要： The present disclosure provides the exhaust gas purification catalyst capable of efficiently converting HC in the upstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst and capable of efficiently converting NOx in the downstream region relative to the exhaust gas flow direction in the exhaust gas purification catalyst while maintaining the good warming-up performance. The present disclosure relates to an exhaust gas purification catalyst including a monolith substrate formed by a catalyst carrier and a catalyst coat layer coated on the monolith substrate, in which the monolith substrate contains Pd, the catalyst coat layer includes a downstream coat layer, the downstream coat layer contains Rh, a density of the downstream coat layer is in a specific range, the exhaust gas purification catalyst has an upstream region (upstream portion) relative to an exhaust gas flow direction and a downstream region (downstream portion) excluding the upstream region and the upstream portion has a Pd concentration higher than a Pd concentration in the downstream portion.
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