Honeycomb catalytic converter
AssigneesIbiden Co., Ltd., Toyota Jidosha Kabushiki Kaisha
InventorsShinnosuke Goto, Takeru Yoshida, Takumi Tojo, Hiromasa Suzuki
Life of this patent
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Abstract
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.
Claims17
A honeycomb catalytic converter comprising:
- 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, and
- each partition wall has a thickness of 0.10 to 0.25 mm.
A honeycomb catalytic converter comprising:
- 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, and
- each second carrier layer has a thickness of 0.05 to 0.20 mm.
A honeycomb catalytic converter comprising:
- 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, and
- the honeycomb catalytic converter has a length to diameter ratio (length/diameter) of 0.5 to 1.1.
Dependencies are inferred from the claim text.