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Title:
EXHAUST GAS PURIFYING CATALYST, METHOD FOR PRODUCING SAME, AND EXHAUST GAS PURIFICATION METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/029382
Kind Code:
A1
Abstract:
This exhaust gas purifying catalyst is provided with: an oxidation catalyst layer (2) that is formed on a carrier (1) and contains zeolite and at least one catalyst metal; an LNT layer (3) that is formed on the oxidation catalyst layer (2) and contains an NOx adsorption material and at least one catalyst metal; and an NOx reduction layer (4) that is formed on the LNT layer (3) and contains alumina and/or zirconia together with Rh, which serves as a catalyst metal. The NOx reduction layer (4) has a larger Rh content than the oxidation catalyst layer (2) and the LNT layer (3).

Inventors:
BABA TAKASHI (JP)
YAMADA HIROSHI (JP)
HARADA KOICHIRO (JP)
SATO YOSHIYUKI (JP)
SHIGETSU MASAHIKO (JP)
TAKAMI AKIHIDE (JP)
Application Number:
PCT/JP2014/004260
Publication Date:
March 05, 2015
Filing Date:
August 20, 2014
Export Citation:
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Assignee:
MAZDA MOTOR (JP)
International Classes:
B01J23/58; B01D53/94; B01J37/02; F01N3/10; F01N3/28
Domestic Patent References:
WO2012085572A22012-06-28
Foreign References:
JP2013528119A2013-07-08
JP2003093887A2003-04-02
JPH11104462A1999-04-20
JP2012515087A2012-07-05
JP2006068665A2006-03-16
JP2006226190A2006-08-31
JP2008100152A2008-05-01
JPH0810566A1996-01-16
JP2009208045A2009-09-17
JP2005169203A2005-06-30
JP2001310131A2001-11-06
JP2000271443A2000-10-03
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
Patent business corporation MAEDA PATENT OFFICE (JP)
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