公开(公告)号：US20170348674A1

公开(公告)日：2017-12-07

申请号：US15534841

申请日：2015-12-11

Applicant: TOYOTA JIDOSHIA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa SUZUKI ,  Takeru YOSHIDA ,  Masahide MIURA ,  Yuki AOKI ,  Isao CHINZEI ,  Yoshinori SAITO ,  Daisuke OCHIAI ,  Mitsuyoshi OKADA ,  Toshitaka TANABE ,  Akihiko SUDA ,  Masanao SATO ,  Akiya CHIBA ,  Akira MORIKAWA ,  Hirotaka ORI

IPC: B01J23/63 ,  B01J37/03 ,  B01J37/08 ,  F01N3/10 ,  B01J35/04 ,  B01J23/00 ,  B01J35/00 ,  B01J37/02 ,  B01D53/94

Abstract: 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 top layer of a 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：US20180023444A1

公开(公告)日：2018-01-25

申请号：US15547589

申请日：2016-01-25

Applicant: CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshinori SAITO ,  Hirotaka ORI ,  Shingo SAKAGAMI ,  Isao CHINZEI ,  Takeru YOSHIDA ,  Yuki AOKI

IPC: F01N3/28 ,  F01N3/10 ,  B01J23/40

CPC classification number: F01N3/2803 ,  B01D53/86 ,  B01D53/945 ,  B01D2255/1023 ,  B01D2255/65 ,  B01D2255/9022 ,  B01D2255/9032 ,  B01D2255/908 ,  B01J23/40 ,  B01J23/44 ,  B01J23/63 ,  B01J35/0006 ,  B01J35/0073 ,  B01J37/0244 ,  F01N3/101 ,  F01N2330/60 ,  F01N2370/02 ,  F01N2510/0682 ,  F01N2510/0684 ,  Y02T10/22

Abstract: The exhaust gas cleaning catalyst according is provided with a substrate and a catalyst coat layer formed on a surface of the substrate. The catalyst coat layer is formed as a laminate structure having an upper layer and a lower layer. The upper layer is a Pd-free layer that does not contain Pd, and the lower layer is a Pd-containing layer. In addition, when a region of the lower layer that corresponds to 20% of the length of the exhaust gas cleaning catalyst from the exhaust gas inlet side end towards the exhaust gas outlet side of the exhaust gas cleaning catalyst is divided into four equal regions to be each 5% of the length, the relationship A>B>C is satisfied, where A, B, and C represents the Pd content in the first, second, and third region respectively.

公开(公告)号：US20160288096A1

公开(公告)日：2016-10-06

申请号：US15035413

申请日：2014-11-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Takahiko FUJIWARA ,  Yuki AOKI ,  Hiromasa SUZUKI ,  Isao CHINZEI ,  Yuji YABUZAKI

IPC: B01J23/44 ,  B01J35/00 ,  B01D53/94 ,  B01J23/10

CPC classification number: B01J23/44 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/40 ,  B01D2255/407 ,  B01D2255/9022 ,  B01D2255/9032 ,  B01D2255/908 ,  B01J23/002 ,  B01J23/10 ,  B01J23/63 ,  B01J35/0006 ,  B01J35/002 ,  B01J37/0244 ,  B01J37/0248 ,  Y02T10/22

Abstract: Provided is an exhaust gas control catalyst in which a catalyst layer containing at least one of Pd and Pt is formed on a substrate (1), the exhaust gas control catalyst including a first OSC material having a pyrochlore structure and an OSC material whose oxygen storage rate is faster than that of the first OSC material having a pyrochlore structure in a catalyst layer front stage (21) which is in a range from an exhaust gas upstream end of the catalyst layer to a length position which is 50% or lower of a total length of the catalyst layer.

Abstract translation: 本发明提供一种废气控制催化剂，其中在基板（1）上形成有包含Pd和Pt中的至少一种的催化剂层，所述排气控制催化剂包括具有烧绿石结构的第一OSC材料和其储氧 速率比在催化剂层前段（21）中具有烧绿石结构的第一OSC材料的速率快，其范围从催化剂层的废气上游端到50％以下的长度位置 催化剂层的总长度。