Title:
PT/PD DOC WITH ENHANCED CO OXIDATION, HYDROCARBON OXIDATION AND NO OXIDATION AND IMPROVED SULFATION/DESULFATION BEHAVIOR
Document Type and Number:
WIPO Patent Application WO/2018/167055
Kind Code:
A8
Abstract:
A diesel oxidation catalyst, comprising a washcoat comprising four layers, the washcoat being disposed on a substrate, wherein the washcoat comprises a first layer comprising a first platinum group metal supported on a first metal oxide support material, which first layer is disposed on the substrate; a second layer comprising a second platinum group metal supported on a second metal oxide support material, and comprising a fifth platinum group metal, which second layer is disposed on the first layer; a third layer comprising a third platinum group metal supported on a third metal oxide support material and comprising a zeolitic material comprising Fe and comprising a sixth platinum group metal; and a fourth layer comprising a fourth platinum group metal and a fourth metal oxide; wherein the substrate has a length, a front end and a rear end; wherein the first layer is disposed on the substrate on the entire length of the substrate, wherein the second layer is disposed on the first layer on the entire length of the substrate; wherein the third layer is at least partially disposed on the second layer on x % of the length of the substrate from the front end of the substrate; wherein the fourth layer is at least partially disposed on the second layer on y % of the length of the substrate from the rear end of the substrate; wherein x is in the range of from 30 to 70, y is in the range of from 30 to 70 and x + y is in the range of from 95 to 115.
Inventors:
DUMBUYA KARIFALA (DE)
ZABEL CLAUDIA (DE)
SUNG SHIANG (US)
ZABEL CLAUDIA (DE)
SUNG SHIANG (US)
Application Number:
PCT/EP2018/056227
Publication Date:
September 19, 2019
Filing Date:
March 13, 2018
Export Citation:
Assignee:
BASF SE (DE)
BASF CORP (US)
BASF CORP (US)
International Classes:
B01J37/02; B01D53/94; B01J23/00; B01J23/40; B01J23/63; B01J23/656; B01J29/76; B01J35/00; B01J35/02; B01J35/04; B01J37/00
Attorney, Agent or Firm:
ALTMANN STÖßEL DICK PATENTANWÄLTE PARTG MBB (DE)
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