US 2016/0354765 A1 · Nb-Zr-Al-Mixed Oxide Supports for Rh Layer use in TWC Converters

Abstract

The present disclosure describes support oxides, including include Niobium Oxide, which are employed in three-way catalytic (TWC) systems. Disclosed herein are TWC sample systems that are configured to include a substrate and one or more of a washcoat layer, an impregnation layer, and/or an overcoat layer. The disclosed one or more of washcoat layer and/or overcoat layer are formed using a slurry that includes an oxide mixture and an Oxygen Storage Material. The disclosed oxide mixtures include niobium oxide (Nb2O5), zirconia, and alumina. Further, other disclosed oxide mixtures additionally include NiO.

Claims20

Dependent claims

A catalyst system, comprising:

a substrate;
a washcoat deposited on the substrate;
and
an overcoat;
wherein at least one of the group consisting of the washcoat and the overcoat comprises about 20 (w/w) to about 80 (w/w) of an oxide mixture and 0 (w/w) to about 80 wt % of an oxygen storage material;
and
wherein the oxide mixture comprises about 1 (w/w) to about 25 (w/w) niobium oxide, about 1 (w/w) to about 60 (w/w) zirconia, and about 30 (w/w) to about 98 (w/w) alumina.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/732,379Filed 5 Jun 2015

Published

8 Dec 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification19 codes

B01J 23/8474
Vanadium, niobium or tantalum or polonium: niobium
B01D 53/945
Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]:…
B01J 23/20
Of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium: vanadium,…
B01J 35/19
Catalysts, in general, characterised by their form or physical properties: catalysts containing parts with different compositions

Nb-Zr-Al-Mixed Oxide Supports for Rh Layer use in TWC Converters

Life of this patent

Nb-Zr-Al-Mixed Oxide Supports for Rh Layer use in TWC Converters

Life of this patent

Abstract

Claims20