EXHAUST GAS PURIFICATION CATALYST DEVICE

Title:

EXHAUST GAS PURIFICATION CATALYST DEVICE

Document Type and Number:

WIPO Patent Application WO/2018/216817

Kind Code:

A1

Abstract:

An exhaust gas purification catalyst device 10 which comprises: a lower layer 1 which contains metal oxide particles MO, and Pd and Pt supported by the metal oxide particles MO; and an upper layer 2 which contains zirconia-containing metal oxide particles ZrO, and Rh supported by the zirconia-containing metal oxide particles ZrO. This exhaust gas purification catalyst device 10 is configured such that: the lower layer 1 comprises a lower layer first stage part 1f that is on the exhaust gas upstream side, and a lower layer second stage part 1r that is on the exhaust gas downstream side; the lower layer first stage part 1f contains 1.8 g/L or more of Pd and 0.05 g/L or more of Pt; the lower layer second stage part 1r contains 0.10 g/L or more of Pd, while containing no Pt or 0.10 g/L or less of Pt; the amount of the zirconia-containing metal oxide particles ZrO in the upper layer 2 is from 60 g/L to 140 g/L (inclusive); and the amount of Ce in the upper layer 2 in terms of CeO2 is 7g/L or less.

Inventors:

ONOZUKA TAKASHI (JP)
TAKI KENICHI (JP)
KAWAI MASAAKI (JP)

Application Number:

PCT/JP2018/020244

Publication Date:

November 29, 2018

Filing Date:

May 25, 2018

Export Citation:

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Assignee:

CATALER CORP (JP)

International Classes:

B01J23/63; B01D53/94; B01J35/04; B01J37/02; F01N3/10

Foreign References:

JP2008080196A	2008-04-10
JP2012152702A	2012-08-16
JP2010227798A	2010-10-14
JP2010075835A	2010-04-08
JP2005505403A	2005-02-24
US20090041643A1	2009-02-12
JP2012086199A	2012-05-10
JP2015093267A	2015-05-18
JP2010227798A	2010-10-14
JP2015085241A	2015-05-07

Other References: