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US 8,518,333 B2Granted
Honeycomb structured body and exhaust gas purifying device
AssigneeIbiden Co., Ltd.
InventorsKazushige Ohno, Tomokazu Oya
Life of this patent
Estimating the term…
Abstract
A honeycomb structured body of the present invention comprises a plurality of cells placed in parallel with one another in a longitudinal direction with a cell wall therebetween, wherein an oxide catalyst is supported on at least one portion of the cell wall, and the honeycomb structured body has an apparent density of about 0.7 g/cm3 or less.
Claims40
A honeycomb structured body comprising:
- a plurality of porous ceramic members being bound with one another through a sealing material layer which is formed between peripheries of said porous ceramic members, each of said porous ceramic members having a structure in which a plurality of cells are placed in parallel with one another in a longitudinal direction with a cell wall therebetween;
- and
- an oxide catalyst that is supported on at least one portion of said cell wall,
- wherein said oxide catalyst comprises CeO2 and ZrO2, and the amount of supported oxide catalyst is set to at least about 10 g/L and at most about 50 g/L with respect to the apparent volume of said honeycomb structured body,
- wherein said porous ceramic members are each made of a material that includes inorganic particles that is extrusion-molded to form a raw molded body of a rectangular pillar shape and fired at at least 1400° C. and at most 2300° C. to form a fired body, and
- wherein said porous ceramic member has an apparent density of about 0.7 g/cm3 or less and a porosity of at least about 40% and at most about 60%.
3 more elements
An exhaust gas purifying device comprising:
- a honeycomb structured body, which is configured to be installed in an exhaust gas flow path, said honeycomb structured body comprising:
- a plurality of porous ceramic members being bound with one another through a sealing material layer which is formed between peripheries of said porous ceramic members, each of said porous ceramic members having a structure in which a plurality of cells are placed in parallel with one another in a longitudinal direction with a cell wall therebetween;
- an oxide catalyst being supported on at least one portion of said cell wall;
- and
- a catalyst supporting carrier supporting a noble metal catalyst and being placed on the upstream side of said honeycomb structured body,
- wherein said oxide catalyst comprises CeO2 and ZrO2, and the amount of supported oxide catalyst is set to at least about 10 g/L and at most about 50 g/L with respect to the apparent volume of said honeycomb structured body,
- wherein said porous ceramic members are each made of a material that includes inorganic particles that is extrusion-molded to form a raw molded body of a rectangular pillar shape and fired at at least 1400° C. and at most 2300° C. to form a fired body, and
- wherein said porous ceramic member has an apparent density of about 0.7 g/cm3 or less and a porosity of at least about 40% and at most about 60%.
5 more elements
A honeycomb structured body comprising:
- a single porous ceramic member having a structure in which a plurality of cells are placed in parallel with one another in the longitudinal direction with a cell wall therebetween, said porous ceramic member having an integral form as a whole;
- and
- an oxide catalyst that is supported on at least one portion of said cell wall,
- wherein said oxide catalyst comprises CeO2 and ZrO2, and the amount of supported oxide catalyst is set to at least about 10 g/L and at most about 50 g/L with respect to the apparent volume of said honeycomb structured body,
- wherein said porous ceramic member is made of a material that includes inorganic particles that is extrusion-molded to form a raw molded body of a cylindrical shape and fired at at least 1400° C. and at most 2300° C. to form a fired body, and
- wherein said porous ceramic member has an apparent density of about 0.7 g/cm3 or less and a porosity of at least about 40% and at most about 60%.
3 more elements
An exhaust gas purifying device comprising:
- a honeycomb structured body, which is configured to be installed in an exhaust gas flow path, said honeycomb structured body comprising:
- a single porous ceramic member having a structure in which a plurality of cells are placed in parallel with one another in the longitudinal direction with a cell wall therebetween, said porous ceramic member having an integral form as a whole;
- an oxide catalyst being supported on at least one portion of said cell wall;
- and
- a catalyst supporting carrier supporting a noble metal catalyst and being placed on the upstream side of said honeycomb structured body,
- wherein said oxide catalyst comprises CeO2 and ZrO2, and the amount of supported oxide catalyst is set to at least about 10 g/L and at most about 50 g/L with respect to the apparent volume of said honeycomb structured body,
- wherein said porous ceramic member is made of a material that includes inorganic particles that is extrusion-molded to form a raw molded body of a cylindrical shape and fired at at least 1400° C. and at most 2300° C. to form a fired body, and
- wherein said porous ceramic member has an apparent density of about 0.7 g/cm3 or less and a porosity of at least about 40% and at most about 60%.
5 more elements
Dependencies are inferred from the claim text.