Honeycomb catalytic converter
AssigneesIbiden Co., Ltd., Toyota Jidosha Kabushiki Kaisha
InventorsShinnosuke Goto, Takumi Tojo, Takeru Yoshida, Hiromasa Suzuki
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Abstract
The present invention provides 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 composite oxide and alumina, and cerium on a surface of each partition wall has a lower concentration than cerium in a central portion of the partition wall in a thickness direction.
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 composite oxide and alumina, and
- a concentration of cerium on a surface of each partition wall is lower than a concentration of cerium in a central portion of the partition wall in a thickness direction, and
- each partition wall has a thickness of 0.05 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 composite oxide and alumina,
- a concentration of cerium on a surface of each partition wall is lower than a concentration of cerium in a central portion of the partition wall in a thickness direction, and
- the honeycomb catalytic converter has a length to diameter ratio (length/diameter) of 0.5 to 1.1.
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 composite oxide and alumina,
- a concentration of cerium on a surface of each partition wall is lower than a concentration of cerium in a central portion of the partition wall in a thickness direction, and
- the honeycomb catalytic converter has a diameter of 130 mm or less.
Dependencies are inferred from the claim text.