Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Omi Mining Co., Ltd.

Hideo Sobukawa

Tadashi Suzuki

Takashi Shimazu

Akihiko Suda

Hideaki Muraki

Yoshiyasu Fujitani

Akira Morikawa

Masayuki Fukui

Makoto Tomita

Mareo Kimura

Koji Yokota

Yoshio Ukyo

Shiroh Kondoh

Toshio Kandori

Kouji Yokota

Shinichi Matsunaga

Ryusuke Tsuji

Toshio Tanahashi

Yoshiaki Fukushima

Toshitaka Tanabe

Masahiro Sugiura

Masakatsu Sanada

Hiroyuki Mitsui

Kazumasa Takatori

Hiroshi Hirayama

Tomohisa Wakasugi

Naoyoshi Watanabe

Yoshiki Seno

Tamotsu Nakamura

Shinichi Matsumoto

Naoto Miyoshi

Hiroaki Hayashi

Katsuya Komaki

Haruo Doi

Hiroshi Mieda

Miho Hatanaka

Yasuo Takada

Kiyoshi Yamazaki

Toshio Yamamoto

Kazuhisa Yano

Yasutaka Nagai

Yasuo Ikeda

Kenichirou Suzuki

Kae Yamamura

Megumi Sasaki

Hirofumi Shinjoh

Kazuaki Sobue

Tadahiro Nakagawa

Yoriko Hasegawa

Yoriko Matsuoka

Ichiro Konomi

Tsutomu Sawada

Hiroyuki Domyo

Tsuneo Higashi

Masashi Hara

Miyo Mochizuki

Hiroyuki Itahara

Takatsune Fujimura

Disclosed is a chemical thermal energy storage material structure, including a granular chemical thermal energy storage material, a clay mineral having a layered ribbon structure, and a complex metal silicate that is generated by a reaction between the above-mentioned chemical thermal energy storage material and the above-mentioned clay mineral and that includes at least one type of alkaline earth metal.

Chemical thermal energy storage material structure, method of producing the same, and chemical heat accumulator

A heat exchanger heat-utilization device is obtained that can efficiently store heat and dissipate heat in or from a chemical thermal storage medium, and a manufacturing method of the heat exchanger heat-utilization device. A heat exchanger heat-utilization device includes: chemical thermal storage medium composite molded formed by organizing chemical thermal storage medium particles into a porous structural body having flow channels; and a heat exchanger body. The heat exchanger body has thermal storage medium containing portions in which the chemical thermal storage medium composite molded bodies are accommodated, and fluid flow channels that are partitioned from the thermal storage medium containing portions by partition walls and through which a heat exchange medium flows for heat exchange with the chemical thermal storage medium composite molded bodies.

Heat exchanger heat-utilization device and method of manufacturing the same

A chemical heat accumulator includes a receptacle, a first reaction vessel, and a second reaction vessel. The first reaction vessel is hermetically connected to the receptacle and supplied with water from the receptacle. The first reaction vessel contains a chemical compound that causes a hydration reaction with the water from the receptacle to generate water vapor by a heat of reaction, and causes a dehydration reaction by receiving heat. The second reaction vessel is hermetically connected to the first reaction vessel and supplied with the water vapor from the first reaction vessel. The second reaction vessel contains a chemical heat storage material that generates heat by causing a hydration reaction with the water vapor from the first reaction vessel and stores heat through a dehydration reaction caused by receiving heat. The chemical heat storage material is thermally in contact with an object to be heated.

Chemical heat accumulator

A metal oxide nanoporous material comprises two or more kinds of first metal oxides selected from the group consisting of alumina, zirconia, titania, iron oxide, rare-earth oxides, alkali metal oxides and alkaline-earth metal oxides. The metal oxide nanoporous material has nanopores, each with a diameter of 10 nm or smaller, in which the metal oxides are dispersed homogeneously in the wall forming the nanopores.

Metal oxide nanoporous material, coating composition to obtain the same, and methods of manufacturing them

A nanoporous metal oxide material comprising two or more metal oxides, wherein the nanoporous metal oxide material has ceria content of 10 to 60 weight %, zirconia content of 20 to 90 weight %, and alumina content of 70 weight % or less, and has nanopores whose diameters are 10 nm or less, and the metal oxides are homogeneously dispersed in a wall constituting the nanopores.

Nanoporous metal oxide material, catalyst support, and catalyst for hydrogen production reaction using the same

A method of producing a catalyst support comprising a substrate, and coating formed on the surface of the substrate and including powder of a first metal oxide of at least one member selected from the group consisting of alumina, zirconia, titania, iron oxides, oxides of rare earth elements, alkali metal oxides and alkali earth metal oxides, wherein the coating is obtained by heat treating the substrate after applied with a coating composition obtained by mixing the first metal oxide powder together with a fluid raw material composition containing raw material of a second metal oxide of at least one member selected from the group consisting of alumina, zirconia, titania, iron oxides, oxides of rare earth elements, alkali metal oxides and alkali earth metal oxides, at a shear rate of 1000 secor higher.

Catalyst support and method of producing the same

A composite oxide includes CeO, ZrOand a metallic oxide being free from reacting with CeOand ZrOat 700&#xb0; C. or more, preferably at 900&#xb0; C. or more and further preferably at 1,000&#xb0; C. or more. The composite oxide has a regulatory oriented phase, such as a pyrochlore phase, etc., in which at least a part of Ce cations and Zr cations are oriented regularly. The composite oxide makes a catalytic support. The CeO&#x2014;ZrOcomposite oxide and the reaction-free metallic oxide make barriers each other which suppress the granular growth when the composite oxide is subjected to high-temperature heat in a reducing heat treatment to form the regulatory oriented phase. The regulatory oriented phase improves the oxygen storage-and-release capability of the catalytic support. Thus, it is possible to simultaneously attain a large a specific surface area and a high oxygen storage-and-release capability.

Composite oxide, process for producing the same, and exhaust gas reducing co-catalyst

A metal oxide which has a large pore volume, and is very useful as a catalyst support. An alkaline material is added to an aqueous solution in which a compound of a metal element for composing an oxide is dissolved, a resultant mixture is co-precipitated, an obtained precipitate is washed, a washed precipitate is stirred in water along with a surfactant, and is calcined. By adding the surfactant after washing, the pH is not changed so that the adding effect of the surfactant is achieved to its upper most limit, thereby obtaining a metal oxide which has a large pore volume and a large mean diameter of secondary particles, and exhibits excellent gas diffusion properties.

Metal oxide and method for producing the same, and catalyst

This composite oxide powder can secure a large pore volume even after calcination at high temperature and, when a catalyst is formed by loading a noble metal on this composite oxide powder, noble metal grain growth can be suppressed. The composite oxide powder comprises particles of an oxide of a metal Mand an oxide of a metal Mwhich does not dissolve in the oxide of the metal M, the oxide of the metal Mand the oxide of the metal Mbeing dispersed at the nanometer level. Since different oxides serve as a barrier to each other, sintering is suppressed. Therefore, in the case of composite oxide powder comprising Ce as a metal Mand Al as a metal M, grain growth is small even after exposed to high temperature and pores of 3.5-100 nm secure a volume of 0.07 cc/g or more after calcination at 600&#xb0; C. for 5 hours and a volume of 0.04 cc/g or more after calcination at 800&#xb0; C. for 5 hours.

Composite oxide powder, a method for producing the same and a catalyst using the same

An ordinary-temperature purifying catalyst includes an oxide having an oxygen defect introduced by a reduction treatment, and a noble metal loaded on the oxide. For example, the oxide can be at least one oxide selected from the group consisting of cerium oxides and zirconium oxides, at least a part of which has an oxygen defect. The catalyst can purify an environmental loading material, such as carbon monoxide, a nitrogen oxide, ethylene, formaldehyde, trimethylamine, methyl mercaptan and acetaldehyde, in air at an ordinary temperature. A method for how to use the catalyst is also disclosed.

Ordinary-temperature purifying catalyst

Catalyst for purifying exhaust gas

The composite oxide and the composite oxide carrier are manufactured by the precursor forming step and firing step. The composite oxide catalyst is obtained by preparing a composite of catalytic components simultaneously with the formation of the precursor of composite oxide in the step of forming the precursor of composite oxide. The composite oxide and the composite oxide carrier are composed of a composite oxide in which at least one of cerium and zirconium, and aluminium disperse with extremely high homogeneity. With this structure, the heat resistance of the carrier is improved and consequently, enlargement of particles of the composite oxide defining the carrier, and sintering of adjacent particles of the composite oxide can be restrained, whereby the catalyst using the composite oxide carrier in accordance with the present invention is excellent in heat resistance.

Composite oxide, composite oxide carrier and catalyst

The composite oxide and the composite oxide carrier are manufactured by the precursor forming step and firing step. The precursor forming step includes high speed mixing means. The composite oxide catalyst is obtained by preparing a composite of catalytic components simultaneously with the formation of the precursor of composite oxide in the step of forming the precursor of composite oxide. The composite oxide and the composite oxide carrier are composed of a composite oxide in which at least one of cerium and zirconium, and aluminium disperse with extremely high homogeneity. With this structure, the heat resistance of the carrier is improved and consequently, enlargement of particles of the composite oxide defining the carrier, and sintering of adjacent particles of the composite oxide can be restrained, whereby the catalyst using the composite oxide carrier in accordance with the present invention is excellent in heat resistance. With the present invention, the carrier is not limited to a general catalyst carrier. The carrier may be interpreted to indicate general formed bodies. For example, the carrier with the present invention can be also used as materials for sensors and electrodes, optical materials, semiconductors and structure materials. Furthermore, the carrier can be used for a three-way catalyst, NOx catalyst or oxidation catalyst or a part thereof, and a promoter.

A solid solution particle of oxides contains a solid solution of oxides in which one oxide is dissolved into the other oxide, and in which the degree of dissolution of one oxide into the other oxide is not less 50%, and in which an average diameter of crystallite is not more than 100 nm. The solid solution particle of oxides has small average diameter of a crystallite and large specific surface area, and it improves capacities such as an oxygen storage ability due to high degree of dissolution. A catalyst for purifying exhaust gases has excellent purifying performance by employing the solid solution comprising ceria and zirconia which has large OSC and high oxygen adsorption and discharge speed.

Solid solution particle of oxides, a process for producing the same and

A catalyst for purifying exhaust gases includes a porous support; a cerium oxide or a solid solution of a cerium oxide and a zirconium oxide in a state of mutual solid solution, loaded on the porous support; and a noble metal element loaded on the porous support. The cerium oxide or the solid solution has an average particle diameter of from 5 to 100 nm. The cerium oxide is present in the solid solution in an amount of from 0.2 to 4.0 by molar ratio with respect to the zirconium oxide therein. The catalyst can be prepared by: coating and calcinating on a support substrate a slurry of a cerium oxide sol, a cerium oxide sol and a zirconium oxide sol, on a solid solution powder of a cerium oxide and a zirconium oxide in a state of mutual solid solution; and loading a noble metal element thereon. The cerium oxide or its solid solution has a surface area large enough to effect an oxygen storage function, and has an average particle diameter large enough to prevent the same from entering deeply into fine pores of a porous support, thereby providing a catalyst fully exhibiting both of the oxygen storage capability and the catalytic activity.

Catalyst for purifying exhaust gases and process for producing the same

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Nisshin, Japan

Hideo Sobukawa