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公开(公告)号：EP3885030A1
公开(公告)日：2021-09-29
申请号：EP21162278.2
申请日：2021-03-12
发明人： CHINZEI, Isao , NISHIO, Takahiro , SHIRAKAWA, Shogo , MIURA, Masahide , SUZUKI, Hiromasa , KIDO, Yuki , ITO, Minoru , HOSHINO, Sho , NAKAYAMA, Shin
IPC分类号： B01D53/94
摘要： Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.
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公开(公告)号：EP3290112B1
公开(公告)日：2019-12-18
申请号：EP17184910.2
申请日：2017-08-04
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3.发明公开EXHAUST GAS PURIFICATION CATALYST, MANUFACTURING METHOD THEREFOR, AND EXHAUST GAS PURIFICATION METHOD USING SAME 审中-公开排气净化催化剂及其制造方法和使用该方法的排气净化方法
公开(公告)号：EP3263214A1
公开(公告)日：2018-01-03
申请号：EP16755307.2
申请日：2016-02-17
发明人： KATOH, Satoru , TANABE, Toshitaka , MIURA, Masahide , SUZUKI, Hiromasa , NAITO, Hiroaki , ORI, Hirotaka , NARITA, Keiichi , TAKEUCHI, Michihiko , OHASHI, Tatsuya
CPC分类号： B01J23/63 , B01D53/94 , B01D2255/1021 , B01D2255/407 , B01D2255/9202 , B01J35/023 , B01J35/026 , B01J35/04 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/0219 , B01J37/0234 , B01J37/08 , F01N3/28 , F01N2330/02 , F01N2330/06 , F01N2510/068
摘要： A catalyst for purification of exhaust gas, comprises:
a substrate; and
a catalyst coat layer which is formed on a surface of the substrate and which comprises catalyst particles, wherein
the catalyst coat layer has an average thickness in a range of 25 to 160 µm, and a void fraction in a range of 50 to 80% by volume as measured by a weight-in-water method,
0.5 to 50% by volume of all voids in the catalyst coat layer consist of high-aspect ratio pores which have equivalent circle diameters in a range of 2 to 50 µm in a cross-sectional image of a cross-section of the catalyst coat layer which the cross-section is perpendicular to a flow direction of exhaust gas in the substrate, and which have aspect ratios of 5 or higher, and
the high-aspect ratio pores have an average aspect ratio in a range of 10 to 50.摘要翻译： 一种用于净化废气的催化剂，包括：基底; 以及催化剂涂层，所述催化剂涂层形成在所述基材的表面上并且包含催化剂颗粒，其中所述催化剂涂层的平均厚度为25〜160μm，空隙率为50〜80％ 通过水中重量法测定时，催化剂涂层中的全部空隙的0.5〜50体积％由在圆周上具有2〜50μm的当量圆直径的高纵横比的孔构成 所述催化剂涂层的横截面垂直于所述基板中的废气的流动方向并且纵横比为5或更高的横截面的横截面图像，并且所述高纵横比孔具有 平均宽高比在10到50的范围内。
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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：EP3736036A1
公开(公告)日：2020-11-11
申请号：EP20172041.4
申请日：2020-04-29
发明人： CHINZEI, Isao , MIURA, Masahide , NAKAHIGASHI, Seiji , SUZUKI, Hiromasa , YAMAMOTO, Toshio , MORIKAWA, Akira , KATOH, Satoru , ONOZUKA, Takashi , ORI, Hirotaka , OKADA, Mitsuyoshi , HOSHINO, Sho
摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 µm to 100 µm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 µm to 50 µm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein when a surface side in contact with an exhaust gas in a thickness direction of the catalyst coating layer is defined as 0% and a side in contact with the substrate is defined as 100%, 80 % by mass or more of a total amount of the noble metal is present in a range from 0% to 25% or more and 70% or less.
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公开(公告)号：EP3275546A1
公开(公告)日：2018-01-31
申请号：EP16772539.9
申请日：2016-03-24
发明人： SUZUKI, Hiromasa , MIURA, Masahide , SAITO, Yoshinori , KATOH, Satoru , TANABE, Toshitaka , HIRAO, Tetsuhiro , OHASHI, Tatsuya , NAITO, Hiroaki , ORI, Hirotaka , TAKEUCHI, Michihiko , NARITA, Keiichi
CPC分类号： F01N3/101 , B01D53/865 , B01D53/94 , B01D53/945 , B01D53/9477 , B01D2255/1021 , B01D2255/1025 , B01D2255/407 , B01D2255/9022 , B01D2255/9205 , B01J23/56 , B01J23/63 , B01J35/023 , B01J35/026 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/0219 , B01J37/0234 , B01J37/04 , B01J37/08 , F01N3/2825 , F01N2330/06 , F01N2330/34 , Y02T10/22
摘要： The present invention is directed to address the following problem: in an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst, reduction in the gas diffusivity of the underfloor catalyst results in reduction in the use efficiency of a catalytic active site, resulting in reduction in purification performance. The present invention relates to an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst having a catalyst coating where a large number of voids are included, wherein high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain rate or more of the whole volume of the voids, to thereby enhance the purification performance of the catalyst.
摘要翻译： 本发明旨在解决以下问题：在包括启动催化剂和地板下催化剂的组合的双催化剂的排气净化催化剂中，地板下催化剂的气体扩散率的降低导致使用效率降低 催化活性位点，导致净化性能降低。 本发明涉及一种废气净化催化剂，其包括具有催化剂涂层的起动催化剂和地板下催化剂的组合的双重催化剂，其中包含大量空隙的催化剂涂层，其中高纵横比孔隙的纵横比 5以上占空隙总体积的一定比例以上，由此提高催化剂的净化性能。
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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：EP3736035A1
公开(公告)日：2020-11-11
申请号：EP20170599.3
申请日：2020-04-21
发明人： CHINZEI, Isao , MIURA, Masahide , NAKAHIGASHI, Seiji , SUZUKI, Hiromasa , MORIKAWA, Akira , YAMAMOTO, Toshio , KATOH, Satoru , ONOZUKA, Takashi , ORI, Hirotaka , OKADA, Mitsuyoshi , HOSHINO, Sho
摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the transient state in which an A/F repeats rich and lean phases. The present disclosure relates to an exhaust gas purification catalyst comprising a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal, a composite oxide containing cerium oxide and zirconium oxide, and a composite oxide containing aluminum oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 20 µm to 100 µm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 µm to 50 µm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein the noble metal is supported on peripheries of the voids, the composite oxide containing the cerium oxide and the zirconium oxide, and the composite oxide containing the aluminum oxide.
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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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