Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Cataler Corporation

Cataler Industrial Co., Ltd.

Kabushiki Kaisha Toyota Chuo

Takaaki Kanazawa

Naoki Takahashi

Takaaki Itou

Shinichi Matsumoto

Satoshi Iguchi

Tadashi Suzuki

Koichi Kasahara

Syuji Tateishi

Toshiaki Tanaka

Hiromasa Suzuki

Shinichi Takeshima

Kenji Katoh

Naoto Miyoshi

Akira Morikawa

Toshitaka Tanabe

Hideaki Muraki

Oji Kuno

Akemi Sato

Akiya Chiba

Mamoru Ishikiriyama

Michihiko Takeuchi

Takahiro Hayashi

Motohisa Saiki

Tsuneyuki Tanizawa

Hirohisa Tanaka

Naoto Suzuki

Kazuhiro Wakao

Kazuhiro Sakurai

Yukio Kinugasa

Takeru Yoshida

Akimasa Hirai

Takehisa Yaegashi

Keiichi Narita

Mareo Kimura

Satoru Katoh

Masaki Nanahara

Koji Yokota

Yukihiro Sonoda

Yusuke Nakayama

Kouhei Igarashi

Keisuke Sano

Isao Tan

Satoru Kato

Mari Uenishi

Kimikazu Yoda

Tetsuro Kihara

Hiroshi Hirayama

Takayasu Sato

Kazunobu Ishibashi

Kiyoshi Yamazaki

Masashi Taniguchi

Yasutaka Nagai

Masahiko Mitsubayashi

Isao Naito

Kae Yamamura

Masanori Yamato

Kazuhiko Dohmae

Koji Inagaki

Hiroyoshi Tawa

Minoru Itou

Motoya Abe

Shunsuke Haga

Tetsuya Shinozaki

Masaya Kamada

Yuuji Matsuhisa

Mariko Adachi

Kazuhiro Yoshimoto

Itou Minoru

An exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst during endurance at high temperature, and a production method therefor. The method for producing the exhaust gas purifying catalyst that has a porous carrier and a noble metal catalyst supported thereon includes: preparing the porous carrier that contains alumina-ceria-zirconia composite oxide particles and has physical property values, after subjected to baking at 900&#xb0; C. for 5 hours, of a pore diameter of the particles in the range of 2 to 20 nm, a specific surface area of the particles in the range of 75 to 115 m/g, a crystallite size of a ceria-zirconia composite oxide contained in the particles in the range of 4 to 6 nm, and a bulk density of the particles in the range of 0.5 to 0.9 cm/g, and bringing a noble metal chemical solution having an aggregate of platinum or the like with a grain size adjusted to less than or equal to 1 nm with the use of a platinum nitric acid solution or the like, into contact with the porous carrier, so that the noble metal catalyst is supported on the porous carrier.

Exhaust gas purifying catalyst and method for producing the same

Provided is an exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst that would occur during endurance at a high temperature. The exhaust gas purifying catalyst includes a porous support and a noble metal catalyst carried on the porous support. The porous support contains particles of an alumina-ceria-zirconia composite oxide, and the porous support has the following physical property values after subjected to baking at 900&#xb0; C. for 5 hours: a pore diameter of the particles in the range of 2 to 20 nm, a specific surface area of the particles in the range of 75 to 115 m/g, a crystallite size of a ceria-zirconia composite oxide that is contained in the particles in the range of 4 to 6 nm, and a bulk density of the particles in the range of 0.5 to 0.9 cm/g.

[Task] To provide a method that makes it possible to easily, inexpensively and accurately manufacture a machined part with a simple configuration and an excellent strength. [Means for Solution] In a method for manufacturing a machined part according to the invention, a dislocation is partially introduced (S), through shot peening, only into a surface layer of a raw materialin a regionto be machined, graphite is partially deposited (S), through heating, only in the surface layer of the regionto be machined, and then, the surface layer of the regionwhere graphite is deposited is removed, through machining (S), only by an amount corresponding to a working margin, thereby manufacturing a machined part

Method for manufacturing machined part, and machined part

An ambient NOadsorption catalyst that can adsorb NOcontained in an exhaust gas in the presence of CO under standard conditions is placed in an engine exhaust gas passage, in an internal combustion engine. Until an engine post-initiation catalyst is activated, the amounts of a high-boiling-point hydrocarbon and an unsaturated hydrocarbon that are contained in the exhaust gas flowing into the catalyst are reduced so that the NO-adsorbing activity cannot be deteriorated by the adhesion activity of the hydrocarbons while maintaining the CO concentration in the exhaust gas flowing into the catalyst at a level higher than the concentration required for the adsorption of NO.

Exhaust purification device of internal combustion engine

An excellent oxygen storage capacity is achieved even in the case used for a long period of time under high temperature conditions. An oxygen storage material contains a first particle made of a composite oxide of cerium and zirconium or a composite oxide of cerium, a rare-earth element other than cerium and zirconium, a second particle including a composite oxide of a rare-earth element, an alkaline-earth element and zirconium, and a precious metal. A part of the precious metal forms a solid solution with the composite oxide included in the second particle.

Oxygen storage material

An exhaust gas-purifying catalyst includes a support provided with one or more through-holes through which exhaust gas flows, and a catalytic layer supported by the support and containing an oxygen storage material. The exhaust gas-purifying catalyst includes a first section to which the exhaust gas is supplied, and a second section to which the exhaust gas having passed through the first section is supplied. The catalytic layer includes a layered structure of a first catalytic layer containing platinum and/or palladium and a second catalytic layer containing rhodium in the first catalytic section and further includes a third layer containing rhodium in the second section. The second section is smaller in oxygen storage material content per unit volumetric capacity than the first section.

Exhaust gas-purifying catalyst

A catalyst for purification of exhaust gas, in which a noble metal is supported on a metal oxide support, has a basic site content of 1 mmol/L-cat or less, as determined on the basis of an amount of COdesorbed per liter of the catalyst as measured by a COtemperature-programmed desorption method.

Catalyst for purification of exhaust gas, and apparatus and method for purification of exhaust gas using the catalyst

A moisture adsorbing devicecomprising a type Y zeolite, and an NOadsorbing devicebeing put in place on an exhaust-gas downstream side of the moisture adsorbing device, and comprising a zeolite that includes a transition metal ion in the cation exchange sites are included. In NOadsorbing apparatuses, since the less the moisture content in exhaust gases is the more the NOadsorbing capability improves, the NO adsorbing capability in low-temperature region is improved especially by means of the combination with a moisture adsorbing device that comprises a type Y zeolite whose AlOproportion is great and whose moisture adsorbing amount is great compared with the other zeolites.

Exhaust-gas converting apparatus

A particulate inorganic oxide containing aluminum oxide, a metal oxide forming no composite oxide with aluminum oxide, and an additional element including at least one of a rare-earth element and an alkali earth element, the inorganic oxide containing a secondary particle formed by aggregating primary particles; wherein at least a part of the secondary particle includes a plurality of first primary particles, each having a particle size of 100 nm or less, containing aluminum oxide and the additional element, and a plurality of second primary particles, each having a particle size of 100 nm or less, containing the metal oxide and the additional element; wherein at least a part of the first and second primary particles has a surface concentrated region where the additional element has a locally increased content in a surface layer part thereof.

Inorganic oxide, exhaust gas purifying catalyst carrier, and exhaust gas purifying catalyst

A member () resistant to erosion by cavitation on which an amorphous carbon film coating is formed on a surface of a base material has at least a first amorphous carbon film coating () having a plurality of columnar structures () on the surface of the base material (), and a second amorphous carbon film coating () having a plurality of granular structures () deposited with no orientation on the surface of the first amorphous carbon film coating ().

Member for cavitation erosion resistance and method for manufacturing same

The catalyst carrier in accordance with the present invention is a catalyst carrier comprising a support containing an oxide and an element in group 3A of the periodic table, and a coating part covering at least a part of a surface of the support; wherein the coating part contains an element in group 3A of the periodic table; and wherein the element in group 3A contained in the coating part has a concentration higher than that of the element in group 3A contained in the support. In this case, even when a catalyst in which rhodium is supported by the catalyst carrier is used for a long time in a high temperature environment, the grain growth of rhodium particles can be suppressed, and the catalyst can fully be prevented from lowering its activity.

Catalyst carrier and catalyst using the same

An HC-adsorbent capable of adsorbing various kinds of hydrocarbon including lower and higher hydrocarbon, of which the adsorbable amount per unit volume is large, and which exhibits excellent durability at elevated temperatures. The HC-adsorbent is composed of a first zeolite of ZSM-5 of which the silica/alumina (SiO.sub.2 /Al.sub.2 O.sub.3) mole-ratio is 500 or more, and a second zeolite of Y-type zeolite of which the silica/alumina (SiO.sub.2 /Al.sub.2 O.sub.3) mole-ratio is 200 or more. The second zeolite mainly adsorbs higher hydrocarbon while the first zeolite mainly adsorbs lower hydrocarbon, thus enabling adsorption of many kinds of hydrocarbon.

Hydrocarbon-adsorbent

An exhaust gas purifying catalyst, for reducing nitrogen oxides and ammonia in an exhaust gas of an internal combustion engine, in an oxidizing atmosphere, is provided. The exhaust gas purifying catalyst comprises a first catalyst having zeolite carrying platinum and copper thereon. Preferably, the exhaust gas purifying catalyst further comprises a second catalyst having zeolite carrying copper thereon. Preferably, the second catalyst is arranged upstream of the first catalyst, with respect to the exhaust gas flow.

Exhaust gas purifying catalyst

A method for purifying an exhaust gas by simultaneously removing carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, comprising bringing the oxygen rich exhaust gas into contact with an exhaust gas purifying catalyst comprised of at least one noble metal selected from the group consisting of platinum and palladium, at least one alkaline earth metal selected from the group consisting of barium, magnesium, calcium, and strontium, and at least one alkali metal selected from the group consisting of iron, nickel, and cobalt, supported on a carrier composed of a porous substance.

Method for purifying exhaust gas

A catalyst for purifying an exhaust gas for simultaneously removing carbon monoxide, hydrocarbons and nitrogen oxides contained in the exhaust gas under an oxygen rich atmosphere, comprising a carrier composed of a porous material, and barium oxide, lanthanum oxide and platinum supported on the carrier, and a method for purifying an exhaust gas by bringing the exhaust gas under an oxygen rich atmosphere into contact with the above-mentioned catalyst.

Catalyst for purifying exhaust gas and method for purifying exhaust gas

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Toyota, Japan

Takaaki Kanazawa