Title:
CATALYST FOR PURIFYING EXHAUST GAS
Document Type and Number:
Japanese Patent JPS5687430
Kind Code:
A
Abstract:
PURPOSE: To provide the excellent catalyst for purifying the exhaust gas obtained by supporting ZrO2, CeO2 on a porous ceramics carrier as well as one or both of Pt, Pd thereon.
CONSTITUTION: On the porous ceramics carrier such as α-alumina, δ-alumina or alumina.magnesia.spinel (MgAl2O4), ZrO2 and CeO2 are supported in order and, moreover, one or both of Pt and Pd is supported thereon. The resulting product is used as a catalyst for removing harmful components, that is, NOx, CO and a hydrocarbon in the exhaust gas exhausted from an internal combustion engine. Conventional expensive Rh is not necessitated and the catalyst excellent in strength and durability of catalyst activity at a high temp. can be prepared inexpensively.
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Inventors:
FUJITANI YOSHIYASU
MURAKI HIDEAKI
KONDOU SHIROU
TOMITA MAKOTO
YOKOTA KOUJI
SOFUGAWA HIDEO
NAKAMURA TAMOTSU
MURAKI HIDEAKI
KONDOU SHIROU
TOMITA MAKOTO
YOKOTA KOUJI
SOFUGAWA HIDEO
NAKAMURA TAMOTSU
Application Number:
JP16606579A
Publication Date:
July 16, 1981
Filing Date:
December 19, 1979
Export Citation:
Assignee:
TOYODA CHUO KENKYUSHO KK
International Classes:
B01D53/94; B01J21/10; B01J23/56; B01J23/63; (IPC1-7): B01D53/36; B01J21/10; B01J23/56