ZPGM Diesel Oxidation Catalyst Systems and Methods Thereof
The present disclosure refers to a plurality of methods employed for production of ZPGM diesel oxidation catalyst systems substantially free of PGM, which may include a substrate, a washcoat, and an impregnation layer. Washcoat may include at least one carrier material oxides. An optional impregnation layer component, which may include at least one ZPGM catalyst. This catalyst system may be free of any oxygen storage material (OSM). Suitable deposition methods and firing systems may be employed in order to form disclosed ZPGM oxidation catalyst systems, which may be able to remove main pollutants from exhaust of diesel engines, by oxidizing toxic gases.
1 . An apparatus for reducing emissions from an engine having associated therewith an exhaust system, comprising:
an exhaust source;
a substrate;
a washcoat suitable for deposition on the substrate, comprising at least one oxide solid further comprising at least one carrier metal oxide and at least one first ZPGM catalyst; and
an impregnation layer, comprising at least one second ZPGM catalyst;
wherein at least one of the first ZPGM catalyst and second ZPGM catalyst comprises at least one perovskite structured compound having the formula A 1-x M x B 3 , wherein A is selected from the group consisting of at least one of yttrium, strontium, and combinations thereof, B is selected from the group consisting of at least one of transition metal, M is selected from the group consisting of at least one of silver, iron, copper, cerium, niobium, and combinations thereof, and x is between 0 and 1.
2 . The apparatus of claim 1 , wherein the at least one transition metal is selected from the group consisting of manganese, cobalt, chromium, and combinations thereof.
3 . The apparatus of claim 1 , wherein the substrate comprises at least one selected from the group consisting of metallic alloy, microporous material, and combinations thereof.
4 . The apparatus of claim 1 , wherein the substrate comprises cordierite.
5 . The apparatus of claim 1 , wherein the at least one perovskite structured compound is of the general formula Y 1-x Ag x MnO 3 , wherein x is from 0 to 0.5.
6 . The apparatus of claim 5 , wherein the at least one perovskite structured compound is applied in the washcoat and the impregnation layer.
7 . The apparatus of claim 1 , wherein the at least one second ZPGM catalyst comprises about 1% to about 10% by weight yttrium.
8 . The apparatus of claim 1 , wherein the at least one second ZPGM catalyst comprises about 1% to about 10% by weight manganese.
9 . The apparatus of claim 1 , wherein the at least one second ZPGM catalyst comprises about 1% to about 10% by weight silver.
10 . The apparatus of claim 1 , wherein the at least one perovskite structured compound is of the formula Y 0.8 Ag 0.2 MnO 3 .
11 . The apparatus of claim 1 , wherein the T50 for CO is about 167° C.
12 . The apparatus of claim 1 , wherein the T50 for CO is about 181° C.
13 . The apparatus of claim 1 , wherein the T50 for HC is about 238° C.
14 . The apparatus of claim 1 , wherein the T50 for HC is about 249° C.
15 . The apparatus of claim 1 , wherein the substrate has an area of about 60 inches.
16 . The apparatus of claim 1 , wherein the substrate has a volume of about 8.5 liters.
17 . The apparatus of claim 1 , wherein the at least one carrier material oxide is selected from the group consisting of ZrO 2 , doped ZrO 2 with lanthanide group metals, Nb 2 O 5 , Nb 2 O 5 —ZrO 2 , alumina, doped alumina, TiO 2 , doped TiO 2 and mixtures thereof.
18 . The apparatus of claim 1 , wherein the impregnation layer further comprises at least one carrier material oxide selected from the group consisting of ZrO 2 , doped ZrO 2 with lanthanide group metals, Nb 2 O 5 , Nb 2 O 5 —ZrO 2 , alumina, doped alumina, TiO 2 , doped TiO 2 and mixtures thereof.