Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Ibiden Company Limited

Kabushiki Kaisha Toyota Chuo Kenkyusho

Denso Corporation

Takeru Yoshida

Hiromasa Suzuki

Takumi Tojo

Shinnosuke Goto

Masaru Kakinohana

Yuki Aoki

Toshitaka Tanabe

Isao Chinzei

Hirotaka Ori

Yoshinori Saito

Mitsuyoshi Okada

Naoki Takahashi

Masahide Miura

Naoto Miyoshi

Akira Morikawa

Akihiko Suda

Akiya Chiba

Akemi Sato

Miho Hatanaka

Shingo Sakagami

Mikio Murachi

Yasutaka Nomura

Kazunobu Ishibashi

Shinji Tsuji

Atsushi Tanaka

Kosuke Iizuka

Satoru Inoda

Masaaki Kawai

Minoru Itou

Kenta Nomura

Kana Iwata

Hirohisa Tanaka

Koji Miwa

Akimasa Hirai

Keiichi Narita

Mareo Kimura

Kazuya Suzuki

Takahiro Tsukagoshi

Isao Tan

Takaaki Kanazawa

Koichi Kitaura

Nobuyuki Takagi

Mari Uenishi

Masashi Taniguchi

Michihiko Takeuchi

Kenji Inoshita

Daisuke Ochiai

Kaoru Otsuka

Yasutaka Nagai

Yoshitsugu Ogura

Kae Yamamura

Minoru Ito

Hiroya Yamamoto

Tomoaki Sunada

Masanori Yamato

Kazuhiko Dohmae

Hideaki Ueno

Ichiro Hachisuka

Misako Makino

Norio Taguchi

Koichi Uemura

Haruka Makino

Daisuke Mori

Masanao Sato

Shunsuke Ohishi

Suguru Imamura

Satoshi Kamitani

Kenji Nakajima

Masahiro Nakahara

Singo Sakagami

An exhaust gas purification catalyst apparatus 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 and outlet-side cells demarcated by porous partition walls; the catalyst noble metal is supported in inlet-side support regions and outlet-side support regions; each of the inlet-side support regions is formed with a specific length 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; each of the outlet-side support regions is formed with a specific length 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.

Exhaust gas purification catalyst apparatus

An exhaust gas purification catalytic device includes: a substrate; at least one type of noble-metal catalyst that is supported on the substrate; and a coating layer on the surface of the substrate. The substrate includes a plurality of cells which are demarcated by porous walls. The substrate and the coating layer each include ceria-zirconia composite oxide particles.

Exhaust gas purification catalytic device

The present invention relates to a honeycomb catalytic converter, including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and Pd and Rh supported on the partition walls of the honeycomb structured body, wherein the honeycomb structured body is an extrudate containing a ceria-zirconia complex oxide and alumina, a Pd-carrying region where only Pd is supported is formed on the partition walls within a predetermined width from one end of the honeycomb structured body, and a Rh-carrying region where only Rh is supported is formed on the partition walls within a predetermined width from the other end of the honeycomb structured body, and the Pd-carrying region extends to at least 50% of the length of the honeycomb structured body, and the Rh-carrying region extends to at least 20% of the length of the honeycomb structured body.

Honeycomb catalytic converter

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and inorganic fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the raw material mixing step includes pre-mixing of the inorganic binder and the inorganic fibers.

Method of producing honeycomb structured body

The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and alumina fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the percentage of amorphous alumina fibers in the alumina fibers for use in the raw material mixing step is 50 to 100 wt %.

The present disclosure provides a monolith substrate used for an exhaust gas purifying catalyst that improves purification performance, a method for producing such monolith substrate, and an exhaust gas purifying catalyst comprising such monolith substrate. The present disclosure relates to a monolith substrate comprising an alumina-ceria-zirconia composite oxide and alumina, a method for producing such monolith substrate, and an exhaust gas purifying catalyst comprising such monolith substrate.

Monolith substrate, method for producing monolith substrate, and exhaust gas purification catalyst comprising monolith substrate

An exhaust gas purifying catalyst includes: a wall-flow structure substrate including an inlet cell, an outlet cell, and a porous partition; a first catalyst layer formed inside the partition such that a thickness of the first catalyst layer is between 40% and 60%, inclusive, of an overall thickness Tof the partition; and a second catalyst layer formed inside the partition such that the second catalyst layer extends across an entire region of the partition in a thickness direction thereof.

Exhaust gas purifying catalyst

The present invention provides a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia composite oxide and alumina, and cerium on a surface of each partition wall has a lower concentration than cerium in a central portion of the partition wall in a thickness direction.

The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Pd, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Rh.

The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a noble metal supported on the honeycomb structured body; and an inlet-side end face and on outlet-side end face, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the inlet-side end face has a higher aperture ratio than the outlet-side end face.

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&#x3e;B&#x3e;C is satisfied, where A, B, and C represents the Pd content in the first, second, and third region respectively.

Exhaust gas cleaning catalyst

A honeycomb structured body includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween. The honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers. 60 to 80% of inorganic fibers observed in a cross-sectional image of the honeycomb structured body cut in a cross-sectional direction perpendicular to a longitudinal direction have a ratio of the length of a long axis to the length of a short axis (long axis/short axis) of 1.00 to 1.30. The length of the long axis is the length of a long axis of a cross section of an inorganic fiber shown in the cross-sectional image. The length of the short axis is the length of a perpendicular bisector of the long axis.

Honeycomb structured body

The present invention provides a honeycomb structured body containing a ceria-zirconia composite oxide and being less susceptible to ring-off cracking. The honeycomb structured body of the present invention includes a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body contains ceria-zirconia composite oxide particles and inorganic fibers, and a b-axis thermal expansion coefficient measured in a direction along a b-axis representing a direction perpendicular to a longitudinal direction of the honeycomb structured body is higher than an a-axis thermal expansion coefficient measured in a direction along an a-axis representing the longitudinal direction of the honeycomb structured body.

The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles, &#x3b8;-alumina particles, &#x3b3;-alumina, and &#x3b1;-alumina fibers, and the honeycomb fired body has a porosity of 55 to 70%.

Honeycomb structure and production method for said honeycomb structure

The exemplary embodiments relate to an exhaust gas purification catalyst, in which exhaust gas purification performance is secured and an increase in pressure loss is suppressed, which is an exhaust gas purification catalyst, in which a porous filter wall of a substrate having a wall-flow structure is coated with a catalyst material containing an OSC material having oxygen storage capacity and a catalyst metal, wherein the density of percolation paths having percolation path diameters of 4 &#x3bc;m or more per unit area inside of the filter wall coated with the catalyst material is 100 paths/mmto 1000 paths/mm.

Exhaust gas purification catalyst

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Toyota, Japan

Takeru Yoshida