Nissan Motor Company Limited

Renault S.a.s.

Nitivy Co., Ltd.

Hideaki Morisaka

Yasunari Hanaki

Masahiro Takaya

Hiroshi Akama

Hitoshi Onodera

Toshiharu Miyamura

Toru Nishizawa

Masanori Nakamura

Katsuo Suga

Kouji Masuda

Hironori Wakamatsu

Kazuyuki Shiratori

Hirofumi Yasuda

Hiroto Kikuchi

Yoshiaki Hiramoto

Kenji Uesugi

Takeshi Yamauchi

Michiaki Sagesaka

Naoki Harakawa

Masanori Nakamaura

An oxidation catalyst is disclosed, which contains Ce and Ga, and a Ce&#x2014;Ga composite oxide containing a solid solution in which a part of Ce is substituted with Ga. This oxidation catalyst is obtained in such a manner that pH of a mixed solution obtained by mixing a Ce-containing solution and a Ga-containing solution together is adjusted, and a precipitate obtained by coprecipitating Ce and Ga is dried and baked.

Oxidation catalyst and method for producing the oxidation catalyst

A particulate matter purifying material is used for a filter catalyst for purifying particulate matter that is disposed in an exhaust gas flow path of an internal combustion engine, traps the particulate matter in exhaust gas generated in the internal combustion engine, and burns the particulate matter to be deposited, so as to be regenerated. The particulate matter purifying material includes an oxide containing cerium (Ce) having an oxygen storage-release capacity, and at least one metal (Me) selected from the group consisting of Zr, Y, La, Pr, Sr, Nb and Nd, wherein a content ratio (Ce:Me) of cerium to the metal is 6:4 to 9:1 in terms of an atomic ratio, and a degree of crystallinity (CR) represented by the following formula (1) is within a range of 25 to 60%:Degree of crystallinity ()=&#xd7;100(%)&#x2003;&#x2003;(1)wherein I represents an X-ray diffraction peak intensity with regard to a (111) plane of a CeOphase in the particulate matter purifying material, and Irepresents the X-ray diffraction peak intensity with regard to the (111) plane of the CeOphase after the particulate matter purifying material is baked in air at 1000&#xb0; C.

Particulate matter purifying material, filter catalyst for purifying particulate matter using particulate matter purifying material, and method of regenerating filter catalyst for purifying particulate matter

An exhaust gas purifying catalyst () includes: a three-dimensional structural substrate () having a plurality of cells () partitioned by cell walls () having pores (); and catalyst layers () formed in the three-dimensional structural substrate (). The catalyst layers () have pore-cover portions () formed on surfaces () of the pores () of the cell walls (). In addition, the catalyst layers () of the pore-cover portions () have activated pores () with a pore diameter of 0.1 micrometers to 10 micrometers. In the exhaust gas purifying catalyst (), the obstruction of the vent holes (pores ()) in the catalyst layers () can be controlled, and the pressure loss can be reduced.

Exhaust gas purifying catalyst and manufacturing method of the same

A catalytic converter includes: a three-dimensional structural support having a plurality of cells partitioned by porous cell walls, in which a pore diameter of the cell walls is 10 &#x3bc;m to 50 &#x3bc;m and porosity of the cell walls is 40 vol % or more; and a catalyst-coated layer containing a catalyst component. The catalyst-coated layer is coated on surfaces of the cell walls of the three-dimensional structural support. 50 mass % or more of a total supported amount of the catalyst component on the three-dimensional structural support is present in a region from the surfaces of the cell walls of the three-dimensional structural support to surfaces of the catalyst-coated layer.

Catalytic converter and manufacturing method thereof

An inorganic fiber catalyst includes an alumina-silica fiber base material, and a plurality of catalyst component particles contained in the alumina-silica fiber base material. A mean particle diameter of the catalyst component particles contained in at least a surface portion of the alumina-silica fiber base material is 50 nm or less, and a standard deviation of particle diameters of the catalyst component particles is 30 or less.

Inorganic fiber catalyst, production method thereof and catalyst structure

An exhaust gas purifying catalyst including: a plurality of first compoundswhich have precious metal particlessupported thereon and are formed into a particle shape; and second compoundswhich are arranged among the plurality of first compoundsand separate the first compoundsfrom one another, wherein pore volumes of the precious metal particles, the first compoundsand the second compoundsare 0.24 to 0.8 cm/g.

Exhaust gas purifying catalyst and production method thereof

Growing community of inventors

Yokohama, Japan

Hideaki Morisaka