公开(公告)号：US20210205790A1

公开(公告)日：2021-07-08

申请号：US17107997

申请日：2020-12-01

申请人： Seiji NAKAHIGASHI ,  Isao CHINZEI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Hiromi TOGASHI ,  Takahiro NOGUCHI ,  Isao NAITO

发明人： Seiji NAKAHIGASHI ,  Isao CHINZEI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Hiromi TOGASHI ,  Takahiro NOGUCHI ,  Isao NAITO

IPC分类号： B01J23/46 ,  B01J23/42 ,  B01J35/02 ,  F01N3/10

摘要： The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.

公开(公告)号：US20210197176A1

公开(公告)日：2021-07-01

申请号：US17107224

申请日：2020-11-30

申请人： Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Hiromi TOGASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

发明人： Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Hiromi TOGASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

IPC分类号： B01J23/46 ,  B01J23/10 ,  B01J35/00 ,  B01D53/94

摘要： The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.

公开(公告)号：US20210301706A1

公开(公告)日：2021-09-30

申请号：US17211112

申请日：2021-03-24

申请人： Isao CHINZEI ,  Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Hiromasa SUZUKI ,  Yuki KIDO ,  Minoru ITO ,  Sho HOSHINO ,  Shin NAKAYAMA

发明人： Isao CHINZEI ,  Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Hiromasa SUZUKI ,  Yuki KIDO ,  Minoru ITO ,  Sho HOSHINO ,  Shin NAKAYAMA

IPC分类号： F01N3/28 ,  B01J23/44 ,  B01J23/46 ,  B01J21/14 ,  B01J35/00 ,  B01J35/02

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.

公开(公告)号：US20180236401A1

公开(公告)日：2018-08-23

申请号：US15534794

申请日：2015-12-11

申请人： Isao CHINZEI ,  Hiromasa SUZUKI ,  Takeru YOSHIDA ,  Masahide MIURA ,  Yuki AOKI ,  Mitsuyoshi OKADA ,  Toshitaka TANABE ,  Akihiko SUDA ,  Yoshinori SAITO ,  Hirotaka ORI ,  Kosuke IIZUKA ,  Akira MORIKAWA

发明人： Isao CHINZEI ,  Hiromasa SUZUKI ,  Takeru YOSHIDA ,  Masahide MIURA ,  Yuki AOKI ,  Mitsuyoshi OKADA ,  Toshitaka TANABE ,  Akihiko SUDA ,  Yoshinori SAITO ,  Hirotaka ORI ,  Kosuke IIZUKA ,  Akira MORIKAWA

IPC分类号： B01D53/94 ,  B01J37/00 ,  B01J35/10 ,  C01F17/00 ,  F01N3/10

摘要： The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the lower layer of the catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.

公开(公告)号：US20220118428A1

公开(公告)日：2022-04-21

申请号：US17495881

申请日：2021-10-07

申请人： Isao Chinzei ,  Seiji NAKAHIGASHI ,  Takumi TOJO ,  Masahide MIURA ,  Noboyuki TAKAGI ,  Yoshiteru YAZAWA ,  Sho HOSHINO ,  Minoru ITO ,  Naoto FUJITA ,  Tomomasa AIKAWA

发明人： Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Takumi TOJO ,  Masahide MIURA ,  Noboyuki TAKAGI ,  Yoshiteru YAZAWA ,  Sho HOSHINO ,  Minoru ITO ,  Naoto FUJITA ,  Tomomasa AIKAWA

IPC分类号： B01J23/58 ,  B01J35/04 ,  B01D53/94

摘要： Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.

公开(公告)号：US20220062884A1

公开(公告)日：2022-03-03

申请号：US17410043

申请日：2021-08-24

申请人： Isao CHINZEI ,  Takumi TOJO ,  Shogo SHIRAKAWA ,  Sho HOSHINO ,  Minoru ITO ,  Naoto FUJITA

发明人： Isao CHINZEI ,  Takumi TOJO ,  Shogo SHIRAKAWA ,  Sho HOSHINO ,  Minoru ITO ,  Naoto FUJITA

IPC分类号： B01J35/00 ,  B01J23/44 ,  B01J23/46 ,  B01J35/02 ,  B01J35/04 ,  B01J21/14 ,  F01N3/28 ,  B01D53/94

摘要： An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.

公开(公告)号：US20220106900A1

公开(公告)日：2022-04-07

申请号：US17487236

申请日：2021-09-28

申请人： Isao CHINZEI ,  Takumi TOJO ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Minoru ITO ,  Naoto FUJITA

发明人： Isao CHINZEI ,  Takumi TOJO ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Minoru ITO ,  Naoto FUJITA

IPC分类号： F01N13/00 ,  F01N3/28

摘要： An exhaust gas purification device includes a substrate including an upstream end and a downstream end, the substrate having a length Ls between the upstream end and the downstream end; a first catalyst layer containing first catalyst particles, extending across a first region, and being in contact with the substrate, the first region extending between the upstream end and a first position, the first position being at a first distance La from the upstream end toward the downstream end; and a second catalyst layer containing second catalyst particles, extending across a second region, and being in contact with the substrate, the second region extending between the downstream end and a second position, the second position being at a second distance Lb from the downstream end toward the upstream end. The first catalyst layer has an inner surface defining macropores.

公开(公告)号：US20220298942A1

公开(公告)日：2022-09-22

申请号：US17682646

申请日：2022-02-28

申请人： Isao CHINZEI ,  Takumi TOJO ,  Takahiro NISHIO ,  Yosuke TODA ,  Hirotaka ORI ,  Minoru ITO ,  Sho HOSHINO

发明人： Isao CHINZEI ,  Takumi TOJO ,  Takahiro NISHIO ,  Yosuke TODA ,  Hirotaka ORI ,  Minoru ITO ,  Sho HOSHINO

IPC分类号： F01N3/10 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J21/04 ,  B01J21/06 ,  B01J23/10

摘要： Provided is an exhaust gas purification catalyst having an improved catalyst performance while securing an OSC in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer has an upstream coat layer formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst and a downstream coat layer formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst. The downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal.