Multifunctional catalysts for hydrocarbon oxidation and selective catalytic reduction of NOx.

Abstract

The present invention relates to a catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides, the catalyst comprising: a substrate including an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end, and a plurality of passages defined by an interior wall of the substrate extending through the substrate; and a coating disposed on a surface of the interior wall of the substrate, the surface defining an interface between the passages and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material, and further comprising a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, the mixed oxide being supported on a second oxide material.

Description

[Technical Field]

[0001] The present invention relates to a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, to a process for producing a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, and to a catalyst obtainable or obtained by the process of the invention. Furthermore, the present invention relates to an exhaust gas treatment system comprising said catalyst. [Background technology]

[0002] Commercially available selective catalytic reduction (SCR) catalysts allow for faster warm-up during transient and on-demand matched cycles by placing such catalysts upstream of the filter in a close-coupled position. Improved NOx removal may be achieved during the cycle. However, when placed in a close-coupled position, these catalysts cannot be regenerated to remove sulfur or become sulfur resistant to achieve high NOx conversion over the catalyst's cycle life. Patent document 1 (US 2015 / 0375207 A1) discloses a layered catalyst with combined functions, i.e., CO and NOx removal, comprising an oxidation layer (top layer) and an ammonia-SCR catalyst layer (bottom layer) on a substrate. Patent document 2 (US 5,371,056) discloses an oxidation-controlled diesel catalyst comprising a flow-through substrate, an activity-promoting dispersion coating as a support for the active component. Patent Document 3 (WO2018 / 224651A2) discloses a Pd-containing SCR catalyst, a layered Pd-zirconia and Cu-zeolite design, in a close-coupled position. However, the catalyst described above has deficiencies in terms of desulfation in the cc-position.

[0003] Vanadium-based SCR catalysts are known for their sulfur tolerance. They can also provide mild hydrocarbon (HC) oxidation performance. However, the high temperatures resulting from the concomitant HC exotherm can lead to irreversible deactivation of the catalyst. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US2015 / 0375207A1 [Patent Document 2] US5371056 [Patent Document 3] WO2018 / 224651A2 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, highly stable vanadium-containing catalysts are needed for close-coupled applications. Indeed, the present invention aims to improve heavy-duty diesel (HDD) systems to meet Euro VI, Euro VII, and CARB requirements.

[0006] It is therefore an object of the present invention to provide a multifunctional catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of NOx, which provides improved catalytic performance (e.g., excellent HC oxidation and SCR of NOx) while reducing nitrous oxide emissions. Surprisingly, it has been found that the multifunctional catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of NOx according to the present invention makes it possible to achieve improved catalytic performance, e.g., excellent HC oxidation and SCR of NOx, while reducing nitrous oxide emissions. Furthermore, the present invention also takes advantage of the desulfurization properties of vanadia supported on an oxide material such as titania. [Means for solving the problem]

[0007] Accordingly, the present invention provides a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, The surface defines an interface between the passageway and the interior wall, and the coating comprises a platinum group metal component supported on a first oxide material, and further comprises a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, the mixed oxide relating to a catalyst supported on a second oxide material. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 shows the NOx conversion at steady state conditions for the catalysts of Examples 1, 2.1 and 2.2 at inlet temperatures ranging from 200 to 325° C. [Figure 2] FIG. 2 shows the N2O formation obtained from the catalysts of Examples 1, 2.1 and 2.2 at inlet temperatures ranging from 200 to 325°C. [Figure 3] FIG. 3 shows the HC ignition performance of the catalysts of Examples 1, 2.1 and 2.2 and Comparative Examples 1 to 3. [Figure 4] FIG. 4 shows the catalytic performance (de-NOx and N2O formation) of the catalysts of Examples 1, 2.1 and 2.2 and Comparative Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0009] With regard to substrate (i), this is preferably a flow-through substrate or alternatively a wall-flow filter substrate. More preferably, substrate (i) is a flow-through substrate.

[0010] With respect to substrate (i), preferably, it comprises a ceramic substrate, more preferably is composed of a ceramic substrate, wherein the ceramic substrate more preferably comprises, more preferably is composed of, one or more of alumina, silica, silicate, aluminosilicate, more preferably comprises, more preferably is composed of, one or more of cordierite or mullite, aluminotitanate, silicon carbide, zirconia, magnesia, more preferably spinel, and titania, more preferably comprises, more preferably is composed of, one or more of silicon carbide and cordierite. More preferably, substrate (i) comprises, more preferably is composed of a ceramic substrate, wherein the ceramic substrate more preferably comprises, more preferably is composed of cordierite.

[0011] The platinum group metal component preferably comprises, and more preferably consists of, one or more of palladium, platinum, rhodium, and iridium, more preferably comprises, and more preferably consists of one or more of palladium, platinum, and rhodium, more preferably comprises, and more preferably consists of one or more of palladium and rhodium, and more preferably comprises, and more preferably consists of palladium. More preferably, the platinum group metal component comprises, and more preferably consists of palladium.

[0012] Regarding the amount of platinum group metal component, the coating has a platinum group metal component content of 2 to 70 g / ft, calculated as platinum group metal element. 3 range, more preferably 5 to 50 g / ft 3 range, more preferably 10 to 30 g / ft 3 in the range of 12 to 20 g / ft 3 It is preferred to include it at a loading in the range of

[0013] Thus, preferably, the present invention provides a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a flow-through substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, the surface defines an interface between the passageway and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material, and further comprising a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, the mixed oxide supported on a second oxide material; and The platinum group metal component relates to a catalyst comprising, and more preferably consisting of, one or more of palladium, platinum, rhodium, and iridium, more preferably comprising, and more preferably consisting of, one or more of palladium, platinum, and rhodium, more preferably comprising, and more preferably consisting of, one or more of palladium and rhodium, more preferably comprising palladium, and more preferably consisting of palladium.

[0014] In the present invention, the first oxide material preferably comprises one or more oxides, more preferably one or more of zirconium oxide, aluminum oxide, silicon oxide, and titanium oxide, more preferably one or more of zirconium oxide, aluminum oxide, and silicon oxide.

[0015] More preferably, the first oxide material contains zirconium oxide. More preferably, 75 to 100 mass %, more preferably 80 to 98 mass %, and more preferably 85 to 95 mass % of the first oxide material is made up of zirconia.

[0016] More preferably, the first oxide material further comprises one or more of hafnium oxide and lanthanum oxide, more preferably hafnium oxide and lanthanum oxide. More preferably, 98 to 100 mass%, more preferably 99 to 100 mass%, more preferably 99.5 to 100 mass%, more preferably 99.9 to 100 mass% of the first oxide material is composed of zirconia, hafnium oxide, and lanthanum oxide. More preferably, 80 to 98 mass%, more preferably 85 to 95 mass% of the first oxide material is composed of zirconia, 1.5 to 15 mass%, more preferably 4 to 12 mass% of the first oxide material is composed of lanthanum oxide, and 0.5 to 5 mass%, more preferably 1 to 3 mass% of the first oxide material is composed of hafnium oxide.

[0017] Instead, the first oxide material more preferably contains aluminum oxide, and more preferably 70 to 100 mass %, more preferably 72 to 95 mass %, and even more preferably 75 to 85 mass % of the first oxide material is alumina.

[0018] More preferably, the first oxide material further comprises one or more of lanthanum oxide and zirconium oxide, more preferably lanthanum oxide and zirconium oxide. More preferably, 98 to 100 mass%, more preferably 99 to 100 mass%, more preferably 99.5 to 100 mass%, more preferably 99.9 to 100 mass% of the first oxide material is composed of alumina, zirconium oxide, and lanthanum oxide. More preferably, 72 to 95 mass%, more preferably 75 to 85 mass% of the first oxide material is composed of alumina, 4 to 24 mass%, more preferably 14 to 22 mass% of the first oxide material is composed of zirconium oxide, and 1 to 4 mass%, more preferably 1 to 3 mass% of the first oxide material is composed of lanthanum oxide.

[0019] Regarding the amount of the first oxide material, the coating may contain the first oxide material in an amount of 0.25 to 1 g / in 3 in the range of 0.30 to 0.80 g / in3 in the range of 0.40 to 0.70 g / in 3 It is preferable that the content be in the range of 100 to 1500 ppm.

[0020] With regard to the mixed oxide, it is preferably a mixed oxide of vanadium and one or more of iron, erbium, bismuth, aluminum and antimony, more preferably a mixed oxide of one or more of iron, erbium, bismuth and antimony, more preferably a mixed oxide of one or more of iron and antimony, more preferably a mixed oxide of vanadium and iron.

[0021] Preferably, the molar ratio X:V of one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony to vanadium in the mixed oxide is in the range of 1:1.5 to 1.5:1, more preferably 1:1.2 to 1.2:1, more preferably 1:1.1 to 1.1:1.

[0022] Accordingly, the present invention preferably provides a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, the surface defines an interface between the passageway and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material and further comprising a mixed oxide of vanadium and iron supported on a second oxide material; the platinum group metal component comprises, more preferably consists of, one or more of palladium, platinum, rhodium, and iridium; more preferably comprises, more preferably consists of, one or more of palladium, platinum, and rhodium; more preferably comprises, more preferably consists of, one or more of palladium and rhodium; more preferably comprises, more preferably consists of palladium; In the mixed oxide, the molar ratio of iron to vanadium, X:V, is more preferably in the range of 1:1.5 to 1.5:1, more preferably 1:1.2 to 1.2:1, more preferably 1:1.1 to 1.1:1.

[0023] In the present invention, for the second oxide material supporting the mixed oxide, it preferably comprises one or more oxides, more preferably one or more of titanium oxide, aluminum oxide, silicon oxide and zirconium oxide, more preferably one or more of titanium oxide and silicon oxide, more preferably titanium oxide, more preferably titania.

[0024] More preferably, the second oxide material comprises titanium oxide, preferably titania, and one or more of tungsten oxide, silicon oxide, antimony oxide, and cerium oxide, more preferably one or more of tungsten oxide and silicon oxide, more preferably tungsten oxide. More preferably, the tungsten oxide is impregnated into the titania.

[0025] Preferably, 75 to 100 mass %, more preferably 80 to 99 mass %, and even more preferably 85 to 95 mass % of the second oxide material is made up of titania.

[0026] Preferably, 98 to 100 mass %, more preferably 99 to 100 mass %, more preferably 99.5 to 100 mass %, more preferably 99.9 to 100 mass % of the second oxide material is composed of titania and tungsten oxide, and more preferably, 80 to 99 mass %, more preferably 85 to 95 mass % of the second oxide material is composed of titania, and 1 to 20 mass %, more preferably 5 to 15 mass % of the second oxide material is composed of tungsten oxide.

[0027] Preferably, 50 to 90 mass % of the coating is made up of the second oxide material, more preferably 65 to 85 mass %, more preferably 70 to 80 mass %.

[0028] With regard to the amount of mixed oxide, this is preferably in the range of 3 to 25% by weight, more preferably in the range of 5 to 18% by weight, more preferably in the range of 7 to 16% by weight, more preferably in the range of 9 to 15% by weight, more preferably in the range of 10 to 14.5% by weight, based on the weight of the second oxide material.

[0029] Preferably, the coating further comprises an oxide binder, wherein the oxide binder more preferably comprises one or more of zirconia, alumina, titania, silica, and mixed oxides comprising two or more of Zr, Al, Ti and Si, wherein the oxide binder more preferably comprises one or more of alumina and silica, more preferably silica.

[0030] Preferably, in the catalyst the coating comprises 1 to 10% by weight, more preferably 2 to 8% by weight, more preferably 3 to 6% by weight of oxide binder based on the weight of the second oxide material.

[0031] Preferably, the catalyst is coated at a rate of 2.5 to 10 g / in 3 in the range of 3 to 8 g / in 3 in the range of 3.5 to 6 g / in 3 Contains a filling amount in the range of.

[0032] Preferably, the coating is disposed on the surface of the inner wall of the substrate over z% of the axial length of the substrate, where z is in the range of 90-100, more preferably in the range of 95-100, more preferably in the range of 98-100, more preferably in the range of 99-100.

[0033] According to the first aspect of the present invention, preferably the coating according to (ii) (ii.1) a bottom coat comprising a mixed oxide supported on a second oxide material; (ii.2) a top coat comprising a platinum group metal component supported on a first oxide material; and preferably consisting of the bottom coat is disposed on the inner wall surface of the substrate over x% of the substrate axial length, where x is in the range of 90-100, preferably in the range of 95-100, more preferably in the range of 98-100, more preferably in the range of 99-100; The top coat is disposed on the bottom coat over y% of the substrate axial length, where y is in the range of 90-100, preferably in the range of 95-100, more preferably in the range of 98-100, and more preferably in the range of 99-100.

[0034] Preferably, in the above aspect, x=y.

[0035] Preferably, in the above aspect, the second oxide material supporting the mixed oxide comprised in the bottom coat (ii.1) is as defined above.

[0036] Preferably, in the above aspect, the bottom coat according to (ii.1) further comprises an oxide binder as defined above.

[0037] Preferably, 98-100% by weight, more preferably 99-100% by weight, more preferably 99.5-100% by weight, more preferably 99.9-100% by weight of the bottom coat according to (ii.1) consists of the mixed oxide, the second oxide material, and more preferably the oxide binder as defined above.

[0038] According to the above aspect, preferably, 0 to 0.001 wt. % of the bottom coat according to (ii.1) is composed of palladium, more preferably 0 to 0.0001 wt. %, more preferably 0 to 0.00001 wt. %, more preferably 0 to 0.000001 wt. % of the bottom coat according to (ii.1) is composed of palladium, more preferably palladium and platinum, more preferably platinum group metal components. In other words, preferably, the bottom coat according to (ii.1) is substantially free of palladium, more preferably free of palladium, more preferably free of palladium and platinum, more preferably free of platinum group metals, more preferably free.

[0039] According to the above aspect, the catalyst preferably comprises a bottom coat according to (ii.1) at a concentration of 2.2 to 7 g / in 3 in the range of 2.6 to 6 g / in 3 in the range of 3.1 to 5 g / in 3 Contains a filling amount in the range of.

[0040] Preferably, according to the above aspect, the top coat according to (ii.2) further comprises an oxidic component, wherein the oxidic component more preferably comprises one or more of zirconia, alumina, titania, silica, and mixed oxides comprising two or more of Zr, Al, Ti, and Si. More preferably, the oxidic component comprises one or more of zirconia and alumina, more preferably zirconia.

[0041] According to the above aspect, preferably the top coat according to (ii.2) comprises an oxide component in the range of 2 to 20% by weight, more preferably in the range of 5 to 15% by weight, more preferably in the range of 7 to 13% by weight, based on the weight of the first oxide material.

[0042] Preferably, 98 to 100% by weight of the top coat according to (ii.2) consists of 99 to 100% by weight, more preferably 99.5 to 100% by weight, more preferably 99.9 to 100% by weight of the platinum group metal component, more preferably palladium, the first oxide material, and more preferably the oxide material as defined above.

[0043] Preferably, 0 to 0.1% by weight of the top coat according to (ii.2) is made up of vanadium, more preferably 0 to 0.01% by weight, more preferably 0 to 0.001% by weight, more preferably 0 to 0.0001% by weight, in other words, preferably the top coat according to (ii.2) is substantially vanadium-free, more preferably vanadium-free.

[0044] According to the above aspect, preferably 0 to 0.001% by weight of the top coat according to (ii.2) is made up of platinum, more preferably 0 to 0.0001% by weight, more preferably 0 to 0.00001% by weight, more preferably 0 to 0.000001% by weight, more preferably 0 to 0.000001% by weight. In other words, preferably the top coat according to (ii.2) is substantially free of platinum, more preferably free of platinum.

[0045] Preferably according to the above aspect, the catalyst comprises a top coat according to (ii.2) in an amount of 0.3 to 3 g / in 3 in the range of 0.4 to 2 g / in 3 in the range of 0.4 to 1 g / in 3 Contains a filling amount in the range of.

[0046] Preferably, therefore, the present invention provides a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, the surface defines an interface between the passageway and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material, and further comprising a mixed oxide of vanadium and iron, the mixed oxide supported on a second oxide material, and the coating comprising: (ii.1) a bottom coat comprising a mixed oxide supported on a second oxide material; (ii.2) a top coat comprising a platinum group metal component supported on a first oxide material; and preferably consisting of the bottom coat is disposed on the inner wall surface of the substrate over x% of the substrate axial length, where x is in the range of 90 to 100; the top coat is disposed on the bottom coat over y% of the substrate axial length, where y is in the range of 90 to 100; The platinum group metal component relates to a catalyst comprising, more preferably consisting of, one or more of palladium, platinum, rhodium, and iridium, more preferably comprising, more preferably consisting of, one or more of palladium, platinum, and rhodium, more preferably comprising, more preferably consisting of, one or more of palladium and rhodium, more preferably comprising, more preferably consisting of palladium, and more preferably consisting of palladium.

[0047] According to a second aspect of the present invention, the coating according to (ii) consists of one coat, wherein the coat is disposed on the surface of the inner wall of the substrate over z % of the axial length of the substrate, where z is in the range 90-100, more preferably in the range 95-100, more preferably in the range 98-100, more preferably in the range 99-100.

[0048] Accordingly, the present invention preferably provides a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, the surface defines an interface between the passageway and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material, and further comprising a mixed oxide of vanadium and iron, the mixed oxide supported on a second oxide material, the coating comprising one coat; wherein the coating is disposed on the surface of the inner wall of the substrate over z % of the axial length of the substrate, where z is in the range of 90 to 100, preferably in the range of 95 to 100, more preferably in the range of 98 to 100, more preferably in the range of 99 to 100; The platinum group metal component relates to a catalyst comprising, more preferably consisting of, one or more of palladium, platinum, rhodium, and iridium, more preferably comprising, more preferably consisting of, one or more of palladium, platinum, and rhodium, more preferably comprising, more preferably consisting of, one or more of palladium and rhodium, more preferably comprising, more preferably consisting of palladium, and more preferably consisting of palladium.

[0049] According to a third aspect of the present invention, it is contemplated, and preferred, that the order of the coats in the first aspect is reversed, with the bottom coat (ii.1) according to the first aspect being the top coat according to the third aspect of the present invention, and the top coat (ii.2) according to the first aspect being the bottom coat according to the third aspect. Preferably, therefore, the bottom coat according to the third aspect comprises a platinum group metal supported on a first oxide material, and the top coat according to the third aspect comprises a mixed oxide supported on a second oxide material.

[0050] According to a fourth aspect of the invention, it is contemplated and preferred that the two coats described according to the first aspect of the invention are arranged in a compartmentalized arrangement, in particular when the coating according to (ii) (ii.1') a bottom coat comprising a mixed oxide supported on a second oxide material; (ii.2') a top coat comprising a platinum group metal component supported on a first oxide material; and more preferably consisting of, wherein the bottom coat is disposed on the inner wall surface of the substrate from the inlet end to the outlet end of the substrate over x'% of the substrate axial length, where x' is in the range of 20 to 80, more preferably in the range of 30 to 70, more preferably in the range of 40 to 60, more preferably in the range of 45 to 55; The top coat is disposed on the inner wall surface of the substrate from the outlet end to the inlet end over y'% of the substrate axial length, where y' is in the range of 20 to 80, more preferably in the range of 30 to 70, more preferably in the range of 40 to 60, more preferably in the range of 45 to 55. More preferably, 90≦x'+y'≦100.

[0051] For the present invention, preferably 98 to 100% by weight, more preferably 99 to 100% by weight, more preferably 99.5 to 100% by weight, and more preferably 99.9 to 100% by weight, of the coating consists of a platinum group component supported on a first oxide material, a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony supported on a second oxide material, and more preferably an oxide binder as defined above, and optionally an oxide component as defined above.

[0052] Preferably, 0 to 0.1 wt. % of the coating according to (ii) is made up of zeolitic material, preferably molecular sieves, more preferably 0 to 0.01 wt. %, more preferably 0 to 0.001 wt. %, more preferably 0 to 0.0001 wt. %. In other words, preferably, the coating according to (ii) is substantially free, more preferably free, of zeolitic material, preferably molecular sieves.

[0053] Preferably, the catalyst of the present invention comprises a substrate (i) and a coating (ii).

[0054] Furthermore, the present invention relates to a process for producing a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, preferably a catalyst according to the invention and as defined above, comprising: (a) providing a substrate including an inlet end, an outlet end, a substrate axial length extending from said inlet end to said outlet end, and a plurality of passages defined by interior walls of said substrate extending through said substrate; (b) providing one or more mixtures comprising a source of a platinum group metal component, particles of a first oxide material, water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, a second oxide material, and more preferably an oxide binder as defined above; disposing the one or more mixtures over z% of the axial length of the substrate, where z is in the range of 90 to 100; and calcining the one or more mixtures disposed on said substrate. The components used in said method are preferably as defined above.

[0055] Preferably, the mixed oxide particles have a Dv50 in the range of 0.5 to 4 micrometers, more preferably in the range of 0.75 to 3.5 micrometers, more preferably in the range of 1 to 3 micrometers, where Dv50 is measured as defined in Reference Example 1.

[0056] Preferably, the mixed oxide particles have a Dv90 in the range of 5 to 20 micrometers, more preferably in the range of 7 to 15 micrometers, more preferably in the range of 9 to 13 micrometers, where Dv90 is measured as defined in Reference Example 1.

[0057] Preferably, the particles of the first oxide material more preferably comprise zirconia and have a Dv50 in the range of 0.5 to 8 micrometers, more preferably in the range of 1 to 6 micrometers, more preferably in the range of 2 to 5 micrometers, where Dv50 is measured as defined in Reference Example 1. Alternatively, preferably, the particles of the first oxide material more preferably comprise alumina and have a Dv50 in the range of 20 to 45 micrometers, more preferably in the range of 25 to 40 micrometers, more preferably in the range of 28 to 35 micrometers, where Dv50 is measured as defined in Reference Example 1.

[0058] Preferably, the particles of the first oxide material more preferably comprise zirconia and have a Dv90 in the range of 6 to 30 micrometers, more preferably in the range of 10 to 20 micrometers, more preferably in the range of 12 to 18 micrometers, where Dv90 is measured as defined in Reference Example 1. Alternatively, preferably, the particles of the first oxide material more preferably comprise alumina and have a Dv90 in the range of 40 to 75 micrometers, more preferably in the range of 55 to 70 micrometers, more preferably in the range of 60 to 66 micrometers, where Dv90 is measured as defined in Reference Example 1.

[0059] Preferably, the particles of the second oxide material have a Dv50 in the range of 0.1 to 4 micrometers, more preferably in the range of 0.25 to 3 micrometers, more preferably in the range of 0.5 to 2 micrometers, where Dv50 is measured as defined in Reference Example 1.

[0060] Preferably, the particles of the second oxide material have a Dv90 in the range of 0.5 to 8 micrometers, more preferably in the range of 1 to 6 micrometers, more preferably in the range of 2 to 5 micrometers, where Dv90 is measured as defined in Reference Example 1.

[0061] With regard to step (b), preferably this is (b.1) impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material, more preferably calcining the impregnated oxide material, and forming a mixture of the impregnated oxide material with water; (b.2) forming a mixture of water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, and a second oxide material; (b.3) more preferably adding an oxide binder to the mixture obtained in step (b.2); (b.4) mixing the impregnated oxide material mixture obtained in step (b.1), more preferably the mixture with the calcined impregnated oxide material obtained in step (b.1), with the mixture obtained in step (b.2), more preferably step (b.3), more preferably optionally adding a base, more preferably an organic base, to set the pH of the aqueous phase of the resulting mixture to a value in the range of 6 to 8, more preferably in the range of 6.5 to 7.5, to obtain a final mixture; (b.5) disposing the final mixture obtained in step (b.4) on the surface of the inner wall of the substrate provided in step (a), more preferably over z % of the axial length of the substrate, said surface defining the interface between the channels and the inner wall of the substrate, z being between 95 and 10, more preferably between 98 and 100, more preferably between 99 and 100; (b.6) optionally drying the mixture disposed on the substrate obtained in step (b.5) to obtain a dried mixture-treated substrate; (b.7) calcining the mixture disposed on the substrate obtained in step (b.5), more preferably on the dried mixture treated substrate obtained in step (b.6), in a gas atmosphere, more preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, and optionally (b'.5) placing the final mixture obtained in step (b.4) on the surface of the coating disposed on the substrate obtained in step (b.7); (b'.6) optionally drying the mixture-treated substrate obtained in step (b'.5); (b'.7) calcining the mixture-treated substrate obtained in step (b'.5) or the dried mixture-treated substrate obtained in step (b'.6) in a gas atmosphere, more preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, and From step (b.7) or step (b'.7) a catalyst for the oxidation of HC and the selective catalytic reduction of NOx is obtained.

[0062] Regarding step (b.1), preferably this is (b.1.1) impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material; (b.1.2) more preferably, calcining the impregnated first oxide material obtained in step (b.1.1) in a gas atmosphere, more preferably in a gas atmosphere having a temperature in the range of 500-650°C; (b.1.3) forming a mixture of water and the impregnated oxide material obtained in step (b.1.1), more preferably step (b.1.2); (b.1.4) more preferably, setting the pH of the aqueous phase of the mixture obtained in step (b.1.3) to a value in the range of 2 to 5, more preferably in the range of 3.25 to 4.25, optionally by adding an acid, more preferably an organic acid, and more preferably, consists of these.

[0063] Regarding step (b.2), preferably this is (b.2.1) forming a mixture of water and particles of the mixed oxide; (b.2.2) adding a more preferably organic dispersant to the mixture obtained in step (b.2.1); (b.2.3) mixing a second oxide material into the mixture obtained in step (b.2.1), more preferably step (b.2.2); (b.2.4) more preferably, a step of setting the pH of the aqueous phase of the mixture obtained in step (b.2.3) to a value between 6 and 8, more preferably between 6.5 and 7.5, optionally by adding a base, more preferably an organic base, and more preferably, consists of these.

[0064] Regarding step (b), preferably instead this is (b.1') impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material, and more preferably, calcining the impregnated oxide material; (b.2') forming a first mixture of water, the impregnated oxide material obtained in step (b.1'), and more preferably a source of oxide components; (b.3') forming a second mixture with water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, and a second oxide material to obtain a second mixture; (b.4') more preferably adding an oxide binder to the mixture obtained in step (b.3'); (b.5') disposing the second mixture obtained in step (b.3'), more preferably step (b.4'), on the surface of the interior wall of the substrate provided in step (a), said surface defining the interface between the passages of the substrate and the interior wall, more preferably the second mixture being disposed over x% of the axial length of the substrate, where x is in the range of 90-100, more preferably 95-100, more preferably 98-100, more preferably 99-100; (b.6') optionally drying the mixture disposed on the substrate obtained in step (b.5') to obtain a dried mixture-treated substrate; (b.7') calcining the second mixture disposed on the substrate obtained in step (b.5'), more preferably on the dried mixture-treated substrate obtained in step (b.6'), in a gas atmosphere, more preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, to obtain a substrate coated with a bottom coat; and optionally, (B.5') placing the mixture obtained in step (b.3'), more preferably in step (b.4'), on the surface of the coating obtained in step (b.7') and disposed on the substrate; (B.6') optionally drying the mixture-treated substrate obtained in step (B.5'); (B.7') calcining the mixture-treated substrate obtained in step (B.5') or the dried mixture-treated substrate obtained in step (B.6') in a gas atmosphere, more preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C; where the bottom coat is obtained from step (b.7') or (B.7'); (b.8') disposing the first mixture obtained in step (b.2') on the bottom coat, more preferably over y% of the substrate axial length, where y is in the range of 90-100, more preferably 95-100, more preferably 98-100, more preferably 99-100; (b.9') optionally drying the mixture disposed on the substrate obtained in step (b.8') to obtain a dried mixture-treated substrate; (b.10') calcining the mixture disposed on the substrate obtained in step (b.8'), more preferably on the dried mixture treated substrate obtained in step (b.9'), in a gas atmosphere, more preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, and more preferably, consists of these.

[0065] Regarding step (b.2'), preferably this is (b.2'.1) forming a mixture of water and the impregnated oxide material obtained in step (b.1'); (b.2'.2) setting the pH of the aqueous phase of the mixture obtained in step (b.2'.1) to a value in the range of 2 to 5, more preferably in the range of 3.25 to 4.25, optionally by adding an acid, more preferably an organic acid; (b.2'.3) more preferably adding a source of oxide component to the mixture obtained in step (b.2'.2); (b.2'.4) more preferably a step of setting the pH of the aqueous phase of the mixture obtained in step (b.2'.3) to a value in the range of from 6 to 8, more preferably in the range of from 6.5 to 7.5, optionally by adding a base, and more preferably, consists of these.

[0066] Regarding step (b.3'), preferably this is (b.3'.1) forming a mixture of water and particles of the mixed oxide; (b.3'.2) more preferably adding an organic dispersant to the mixture obtained in step (b.3'.1); (b.3'.3) mixing a second oxide material into the mixture obtained in step (b.3'.1), more preferably in step (b.3'.2); (b.3'.4) more preferably a step of setting the pH of the aqueous phase of the mixture obtained in step (b.3'.3) to a value in the range of from 6 to 8, more preferably in the range of from 6.5 to 7.5, optionally by adding a base, and more preferably, consists of these.

[0067] In the context of the present invention, preferably, the placement of one or more mixtures according to one or more of steps (b), (b.5), (b'.5), (b.5'), (B.5') and (b.8'), more preferably steps (b), (b.5), (b'.5), (b.5'), (B.5') and (b.8'), is carried out by spraying or impregnating the substrate, more preferably by impregnating the substrate in said mixture.

[0068] Preferably, according to one or more of steps (b.6), (b'.6), (b.6') and (B.6'), more preferably according to steps (b.6), (b'.6), (b.6') and (B.6'), drying is carried out in a gas atmosphere having a temperature in the range of 60 to 200°C, more preferably in the range of 90 to 160°C; wherein drying is more preferably carried out in a gas atmosphere for a duration in the range of 10 to 240 minutes, more preferably in the range of 15 to 80 minutes, more preferably in the range of 20 to 60 minutes.

[0069] Preferably, according to one or more of steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), more preferably according to steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), the calcination is carried out in a gas atmosphere having a temperature in the range of 425 to 475°C.

[0070] Preferably, according to one or more of steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), more preferably according to steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), the calcination is carried out in a gas atmosphere for a duration in the range of 10 to 240 minutes, more preferably in the range of 15 to 80 minutes, more preferably in the range of 20 to 60 minutes.

[0071] Preferably, the gas atmosphere comprises oxygen, whereby the gas atmosphere is more preferably air.

[0072] Preferably, the platinum group metal component in step (b) comprises one or more of palladium, platinum, rhodium, and iridium, more preferably one or more of palladium, platinum, and rhodium, more preferably one or more of palladium and rhodium, more preferably palladium. More preferably, the source of the platinum group metal component comprises a salt of the platinum group metal component, more preferably a nitrate of a platinum group metal.

[0073] Preferably, the oxide component in step (b.2') is one or more of zirconia, silica, alumina and titania, more preferably one or more of zirconia and silica, more preferably zirconia.

[0074] Preferably, the method according to the invention comprises steps (a) and (b).

[0075] The present invention further relates to an aqueous suspension comprising a source of platinum group metal components, particles of a first oxide material, water, particles of mixed oxides of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, a second oxide material, and an oxide binder, preferably as defined above. The components of the aqueous suspension are preferably as defined above.

[0076] The present invention further relates to a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, preferably according to the present invention, obtainable or obtained by the process according to the present invention and as defined above.

[0077] The present invention further relates to an exhaust gas treatment system for treating exhaust gases from an internal combustion engine, preferably a diesel engine, comprising a catalyst according to the present invention and as defined above and one or more of an ammonia oxidation catalyst, a diesel oxidation catalyst, a selective catalytic reduction catalyst, and a catalyzed particulate filter. Preferably, the catalyst according to the present invention is the first catalyst of the system. Accordingly, the catalyst according to the present invention is preferably a close-coupled catalyst. The system preferably comprises a first ammonia oxidation catalyst arranged downstream of the catalyst according to the present invention and a catalyzed soot filter arranged downstream of the first ammonia oxidation catalyst. More preferably, the system further comprises a selective catalytic reduction catalyst arranged downstream of the catalyzed soot filter. More preferably, the system further comprises a second ammonia oxidation catalyst arranged downstream of the selective catalytic reduction catalyst. Furthermore, the system of the present invention further optionally comprises a diesel oxidation catalyst arranged downstream of the first ammonia oxidation catalyst and upstream of the catalyzed soot filter.

[0078] The present invention further relates to a method for using the catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides (NOx) according to the present invention for simultaneously performing selective catalytic reduction of NOx and oxidation of hydrocarbons.

[0079] The present invention further comprises: (1) providing a gas stream comprising one or more of NOx and hydrocarbons; (2) contacting the gas stream provided in step (1) with a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides (NOx) according to the present invention; The present invention relates to a method for simultaneously performing selective catalytic reduction of nitrogen oxides (NOx) and oxidation of hydrocarbons, comprising:

[0080] The present invention is described by the following set of embodiments and combinations obtained from the indicated dependency and reference relationships. In particular, in each example where a range of embodiments is described, for example, a term such as "a catalyst of any one of embodiments 1 to 4" means that all embodiments within this range are clear to those skilled in the art, i.e., the description of this term is understood to be synonymous with "embodiments 1, 2, 3, and 4" to those skilled in the art. Furthermore, it is clearly noted that the following set of embodiments represents an appropriately structured part of the description directed to general and preferred aspects of the present invention, rather than a set of claims determining the scope of protection.

[0081] 1. A catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, an axial length of the substrate extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the interior wall surface of the substrate; Including, The surface defines an interface between the passageway and the interior wall, and the coating comprises a platinum group metal component supported on a first oxide material, and further comprises a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, the mixed oxide supported on a second oxide material.

[0082] 2. The catalyst of embodiment 1, wherein the substrate (i) is a flow-through substrate or a wall-flow substrate, preferably a flow-through substrate.

[0083] 3. The catalyst of embodiment 1 or 2, wherein the substrate (i) comprises, more preferably consists of, a ceramic substrate, wherein the ceramic substrate preferably comprises, more preferably consists of, one or more of alumina, silica, silicate, aluminosilicate, more preferably comprises, more preferably consists of, one or more of cordierite or mullite, aluminotitanate, silicon carbide, zirconia, magnesia, more preferably spinel, and titania, more preferably comprises, more preferably consists of, one or more of silicon carbide and cordierite, more preferably cordierite.

[0084] 4. The catalyst of any one of embodiments 1 to 3, wherein the platinum group metal component comprises, and more preferably consists of, one or more of palladium, platinum, rhodium, and iridium; preferably comprises, and more preferably consists of, one or more of palladium, platinum, and rhodium; more preferably comprises, and more preferably consists of one or more of palladium and rhodium; and the platinum group metal component preferably comprises, and more preferably consists of palladium.

[0085] 5. The coating contains a platinum group metal component, calculated as platinum group metal elements, of 2 to 70 g / ft 3 range, preferably 5 to 50 g / ft 3 range, more preferably 10 to 30 g / ft 3 in the range of 12 to 20 g / ft 3 5. The catalyst of any one of embodiments 1 to 4, comprising a loading in the range of

[0086] 6. The catalyst of any one of embodiments 1 to 5, wherein the first oxide material comprises one or more oxides, preferably one or more of zirconium oxide, aluminum oxide, silicon oxide, and titanium oxide, more preferably one or more of zirconium oxide, aluminum oxide, and silicon oxide, more preferably zirconium oxide or aluminum oxide.

[0087] 7. The catalyst of embodiment 6, wherein 75 to 100 wt. %, preferably 80 to 98 wt. %, more preferably 85 to 95 wt. % of the first oxide material is composed of zirconia.

[0088] 8. The catalyst of embodiment 7, wherein the first oxide material further comprises one or more of hafnium oxide and lanthanum oxide, preferably hafnium oxide and lanthanum oxide; more preferably 98 to 100%, preferably 99 to 100%, more preferably 99.5 to 100%, more preferably 99.9 to 100%, by weight, of the first oxide material consists of zirconia, hafnium oxide, and lanthanum oxide; more preferably 80 to 98%, more preferably 85 to 95%, by weight, of the first oxide material consists of zirconia, 1.5 to 15%, more preferably 4 to 12%, by weight of the first oxide material consists of lanthanum oxide, and 0.5 to 5%, more preferably 1 to 3%, by weight of the first oxide material consists of hafnium oxide.

[0089] 9. The catalyst of embodiment 6, wherein 70 to 100 wt. %, preferably 72 to 95 wt. %, more preferably 75 to 85 wt. % of the first oxide material consists of alumina.

[0090] 10. The catalyst of embodiment 9, wherein the first oxide material further comprises one or more of lanthanum oxide and zirconium oxide, preferably lanthanum oxide and zirconium oxide; more preferably, 98 to 100%, more preferably 99 to 100%, more preferably 99.5 to 100%, more preferably 99.9 to 100%, by weight, of the first oxide material consists of alumina, zirconium oxide, and lanthanum oxide; more preferably, 72 to 95%, more preferably 75 to 85%, by weight, of the first oxide material consists of alumina, 4 to 24%, more preferably 14 to 22%, by weight of the first oxide material consists of zirconium oxide, and 1 to 4%, more preferably 1 to 3%, by weight of the first oxide material consists of lanthanum oxide.

[0091] 11. The coating comprises a first oxide material in an amount of 0.25 to 1 g / in 3 in the range of 0.30 to 0.80 g / in 3 in the range of 0.40 to 0.70 g / in 3 11. The catalyst of any one of embodiments 1 to 10, comprising a loading in the range of

[0092] 12. The catalyst according to any one of embodiments 1 to 11, wherein the mixed oxide is a mixed oxide of vanadium and one or more of iron, erbium, bismuth, aluminum and antimony, preferably a mixed oxide of vanadium and one or more of iron, erbium, bismuth and antimony, more preferably a mixed oxide of vanadium and one or more of iron and antimony.

[0093] 13. The catalyst of embodiment 12, wherein the mixed oxide is a mixed oxide of vanadium and iron.

[0094] 14. The catalyst according to any one of embodiments 1 to 13, wherein in the mixed oxide, the molar ratio X:V of one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony to vanadium is in the range of 1:1.5 to 1.5:1, preferably 1:1.2 to 1.2:1, and more preferably 1:1.1 to 1.1:1.

[0095] 15. The catalyst of any one of embodiments 1 to 14, wherein the second oxide material supporting the mixed oxide comprises one or more oxides, preferably one or more of titanium oxide, aluminum oxide, silicon oxide, and zirconium oxide, more preferably one or more of titanium oxide and silicon oxide, more preferably titanium oxide, more preferably titania.

[0096] 16. The catalyst of embodiment 15, wherein the second oxide material comprises titanium oxide, preferably titania, and one or more of tungsten oxide, silicon oxide, antimony oxide, and cerium oxide, more preferably one or more of tungsten oxide and silicon oxide, preferably tungsten oxide.

[0097] 17. The catalyst of embodiment 16, wherein the tungsten oxide is impregnated on titania.

[0098] 18. The catalyst of any one of embodiments 15 to 17, wherein 75 to 100 wt. %, preferably 80 to 99 wt. %, more preferably 85 to 95 wt. % of the second oxide material is composed of titania.

[0099] 19. The catalyst of any one of embodiments 15 to 18, wherein 98 to 100% by weight, preferably 99 to 100% by weight, more preferably 99.5 to 100% by weight, more preferably 99.9 to 100% by weight of the second oxide material is composed of titania and tungsten oxide, and wherein more preferably 80 to 99% by weight, more preferably 85 to 95% by weight of the second oxide material is composed of titania, and 1 to 20% by weight, more preferably 5 to 15% by weight of the second oxide material is composed of tungsten oxide.

[0100] 20. The catalyst according to any one of embodiments 15 to 19, wherein 50 to 90 wt. % of the coating is composed of the second oxide material, preferably 65 to 85 wt. %, more preferably 70 to 80 wt. %.

[0101] 21. The catalyst according to any one of embodiments 1 to 20, wherein the amount of mixed oxide in the coating is in the range of 3 to 25% by weight, preferably in the range of 5 to 18% by weight, more preferably in the range of 7 to 16% by weight, more preferably in the range of 9 to 15% by weight, more preferably in the range of 10 to 14.5% by weight, based on the weight of the second oxide material.

[0102] 22. The catalyst of any one of embodiments 1 to 21, wherein the coating further comprises an oxide binder, preferably comprising one or more of zirconia, alumina, titania, silica, and mixed oxides comprising two or more of Zr, Al, Ti, and Si, more preferably comprising one or more of alumina and silica, more preferably comprising silica.

[0103] 23. The catalyst of embodiment 22, wherein the coating in the catalyst comprises 1 to 10 wt. %, preferably 2 to 8 wt. %, more preferably 3 to 6 wt. % of the oxide binder, based on the weight of the second oxide material.

[0104] 24. Catalyst coating: 2.5-10g / in 3 loading in the range of 3 to 8 g / in 3 in the range of 3.5 to 6 g / in 3 24. The catalyst of any one of embodiments 1 to 23, comprising a loading in the range of

[0105] 25. The catalyst of any one of embodiments 1 to 24, wherein the coating is disposed on the surface of the inner wall of the substrate over z% of the axial length of the substrate, where z is in the range of 90 to 100, preferably in the range of 95 to 100, more preferably in the range of 98 to 100, and more preferably in the range of 99 to 100.

[0106] 26.(ii) of the coating (ii.1) a bottom coat comprising a mixed oxide supported on a second oxide material; (ii.2) a top coat comprising a platinum group metal component supported on a first oxide material; and preferably consisting of the bottom coat is disposed on the inner wall surface of the substrate over x% of the substrate axial length, where x is in the range of 90-100, preferably in the range of 95-100, more preferably in the range of 98-100, more preferably in the range of 99-100; 26. The catalyst of any one of embodiments 1 to 25, wherein the top coat is disposed on the bottom coat over y % of the substrate axial length, where y is in the range of 90 to 100, preferably in the range of 95 to 100, more preferably in the range of 98 to 100, more preferably in the range of 99 to 100.

[0107] 27. The catalyst according to embodiment 26, wherein the second oxide material supporting the mixed oxide in the bottom coat (ii.1) is as defined in any one of embodiments 15 to 19.

[0108] 28. The catalyst of embodiment 26 or 27, wherein the bottom coat according to (ii.1) further comprises an oxide binder according to embodiment 22 or 23.

[0109] 29. The catalyst of any one of embodiments 26 to 28, wherein 98 to 100% by weight, preferably 99 to 100% by weight, more preferably 99.5 to 100% by weight, more preferably 99.9 to 100% by weight of the bottom coat according to (ii.1) consists of the mixed oxide, the second oxide material, and more preferably the oxide binder as defined in embodiment 28.

[0110] 30. The catalyst of any one of embodiments 26 to 29, wherein 0 to 0.001% by weight, preferably 0 to 0.0001% by weight, more preferably 0 to 0.00001% by weight, more preferably 0 to 0.000001% by weight, of the bottom coat according to (ii.1) consists of palladium, preferably palladium and platinum, more preferably platinum group metal components.

[0111] 31. The catalyst is applied to the bottom coat according to (ii.1), at a concentration of 2.2 to 7 g / in 3 in the range of 2.6 to 6 g / in 3 in the range of 3.1 to 5 g / in 3 31. The catalyst of any one of embodiments 26 to 30, comprising a loading in the range of

[0112] 32. The catalyst of any one of embodiments 26 to 31, wherein the top coat according to (ii.1) further comprises an oxide component, preferably comprising one or more of zirconia, alumina, titania, silica, and mixed oxides comprising two or more of Zr, Al, Ti, and Si, wherein the oxide component more preferably comprises one or more of zirconia and alumina, more preferably zirconia.

[0113] 33. The catalyst of embodiment 32, wherein the top coat according to (ii.1) comprises the oxide component in the range of 2 to 20% by weight, preferably in the range of 5 to 15% by weight, more preferably in the range of 7 to 13% by weight, based on the weight of the first oxide material.

[0114] 34. The catalyst of any one of embodiments 26 to 33, wherein 98 to 100% by weight, preferably 99 to 100% by weight, more preferably 99.5 to 100% by weight, more preferably 99.9 to 100% by weight of the top coat according to (ii.2) consists of a platinum group metal component, preferably palladium, a first oxide material, and preferably an oxide component as defined in embodiment 32 or 33.

[0115] 35. The catalyst of any one of embodiments 26 to 34, wherein 0 to 0.1 wt.%, preferably 0 to 0.01 wt.%, more preferably 0 to 0.001 wt.%, more preferably 0 to 0.0001 wt.%, of the top coat according to (ii.2) consists of vanadium.

[0116] 36. Apply a top coat according to (ii.2) at 0.3 to 3 g / in 3 range, preferably 0.4 to 2 g / in 3 in the range of 0.4 to 1 g / in 3 36. The catalyst of any one of embodiments 26 to 35, comprising a loading in the range of

[0117] 37. The catalyst of any one of Examples 26 to 36, wherein x=y.

[0118] 38. The catalyst according to any one of the preceding embodiments, wherein the coating according to (ii) consists of one coat, which is disposed on the surface of the inner wall of the substrate over z% of the axial length of the substrate, where z is in the range of 90 to 100, preferably in the range of 95 to 100, more preferably in the range of 98 to 100, more preferably in the range of 99 to 100.

[0119] 39. The catalyst of any one of embodiments 1 to 38, wherein 98 to 100%, preferably 99 to 100%, more preferably 99.5 to 100%, more preferably 99.9 to 100%, by weight, of the coating consists of a platinum group metal component supported on a first oxide material, a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony supported on a second oxide material, and more preferably an oxide binder as defined in embodiment 22 or 23, and optionally an oxide component as defined in embodiment 32 or 33.

[0120] 40. The catalyst of any one of embodiments 1 to 39, wherein 0 to 0.1 wt. % of the coating is composed of zeolitic material, preferably molecular sieve, preferably 0 to 0.01 wt. %, more preferably 0 to 0.001 wt. %, more preferably 0 to 0.0001 wt. % of the coating.

[0121] 41. The catalyst of any one of embodiments 1 to 40, comprising a substrate (i) and a coating (ii).

[0122] 42. A method for producing a catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides, preferably according to any one of embodiments 1 to 41, comprising: (a) providing a substrate including an inlet end, an outlet end, a substrate axial length extending from said inlet end to said outlet end, and a plurality of passages defined by interior walls of said substrate extending through said substrate; (b) providing one or more mixtures comprising a source of a platinum group metal component, particles of a first oxide material, water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, a second oxide material, and an oxide binder, preferably as defined in embodiment 22 or 23; disposing the one or more mixtures over z% of the axial length of the substrate, where z is in the range of 90 to 100; and calcining the one or more mixtures disposed on the substrate.

[0123] 43. Step (b) is (b.1) impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material, preferably calcining the impregnated oxide material, and forming a mixture of the impregnated oxide material with water; (b.2) forming a mixture of water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, and a second oxide material; (b.3) preferably adding an oxide binder to the mixture obtained in step (b.2); (b.4) mixing the impregnated oxide material mixture obtained in step (b.1), preferably the mixture with the calcined impregnated oxide material obtained in step (b.1), with the mixture obtained in step (b.2), preferably in step (b.3), and optionally adding a base, preferably an organic base, to set the pH of the aqueous phase of the resulting mixture to a value in the range of 6 to 8, preferably in the range of 6.5 to 7.5, to obtain a final mixture; (b.5) disposing the final mixture obtained in step (b.4) on the surface of the inner wall of the substrate provided in step (a), preferably over z % of the substrate axial length, said surface defining the interface between the channels and the inner wall of the substrate, z being in the range of 95-10, preferably 98-100, more preferably 99-100; (b.6) optionally drying the mixture disposed on the substrate obtained in step (b.5) to obtain a dried mixture-treated substrate; (b.7) calcining the mixture disposed on the substrate obtained in step (b.5), preferably on the dried mixture treated substrate obtained in step (b.6), in a gas atmosphere, preferably at a temperature in the range of 350-600°C, more preferably in the range of 400-500°C, and optionally (b'.5) placing the final mixture obtained in step (b.4) on the surface of the coating disposed on the substrate obtained in step (b.7); (b'.6) optionally drying the mixture-treated substrate obtained in step (b'.5); (b'.7) calcining the mixture-treated substrate obtained in step (b'.5) or the dried mixture-treated substrate obtained in step (b'.6) in a gas atmosphere, preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, and 43. The method of embodiment 42, wherein step (b.7) or step (b'.7) provides a catalyst for the oxidation of HC and the selective catalytic reduction of NOx.

[0124] 44. Step (b.1) is (b.1.1) impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material; (b.1.2) preferably calcining the impregnated first oxide material obtained in step (b.1.1) in a gas atmosphere, more preferably in a gas atmosphere having a temperature in the range of 500-650°C; (b.1.3) forming a mixture of water and the impregnated oxide material obtained in step (b.1.1), preferably step (b.1.2); (b.1.4) setting the pH of the aqueous phase of the mixture obtained in step (b.1.3) to a value in the range of 2 to 5, preferably in the range of 3.25 to 4.25, preferably by optionally adding an acid, preferably an organic acid, 44. The method of embodiment 43, comprising:

[0125] 45. Step (b.2) is (b.2.1) forming a mixture of water and particles of the mixed oxide; (b.2.2) adding a preferably organic dispersant to the mixture obtained in step (b.2.1); (b.2.3) mixing a second oxide material into the mixture obtained in step (b.2.1), preferably step (b.2.2); (b.2.4) preferably setting the pH of the aqueous phase of the mixture obtained in step (b.2.3) to a value ranging from 6 to 8, preferably from 6.5 to 7.5, optionally by adding a base, preferably an organic base, 45. The method of embodiment 43 or 44, comprising:

[0126] 46. Step (b) is (b.1') impregnating a first oxide material with a source of a platinum group metal component to obtain an impregnated first oxide material, and preferably calcining the impregnated oxide material; (b.2') forming a first mixture with water, the impregnated first oxide material obtained in step (b.1') and preferably a source of oxide component; (b.3') forming a second mixture with water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, and a second oxide material to obtain a second mixture; (b.4') preferably adding an oxide binder to the mixture obtained in step (b.3'); (b.5') disposing the second mixture obtained in step (b.3'), preferably step (b.4'), on the surface of the interior wall of the substrate provided in step (a), said surface defining the interface between the channels of the substrate and the interior wall, preferably the second mixture being disposed over x% of the axial length of the substrate, where x is between 90 and 100, more preferably between 95 and 100, more preferably between 98 and 100, more preferably between 99 and 100; (b.6') optionally drying the mixture disposed on the substrate obtained in step (b.5') to obtain a dried mixture-treated substrate; (b.7') calcining the second mixture disposed on the substrate obtained in step (b.5'), preferably on the dried mixture-treated substrate obtained in step (b.6'), in a gas atmosphere, preferably at a temperature in the range of 350-600°C, more preferably at a temperature in the range of 400-500°C, to obtain a substrate coated with a bottom coat; and optionally, (B.5') placing the mixture obtained in step (b.3'), preferably step (b.4'), on the surface of the coating obtained in step (b.7') and disposed on the substrate; (B.6') optionally drying the mixture-treated substrate obtained in step (B.5'); (B.7') calcining the mixture-treated substrate obtained in step (B.5') or the dried mixture-treated substrate obtained in step (B.6') in a gas atmosphere, preferably at a temperature in the range of 350 to 600°C, more preferably at a temperature in the range of 400 to 500°C; where the bottom coat is obtained from step (b.7') or (B.7'); (b.8') disposing the first mixture obtained in step (b.2') on the bottom coat, preferably over y% of the substrate axial length, where y is in the range of 90-100, more preferably 95-100, more preferably 98-100, more preferably 99-100; (b.9') optionally drying the mixture disposed on the substrate obtained in step (b.8') to obtain a dried mixture-treated substrate; (b.10') calcining the mixture disposed on the substrate obtained in step (b.8'), preferably on the dried mixture-treated substrate obtained in step (b.9'), in a gas atmosphere, preferably at a temperature in the range of 350-600°C, more preferably in the range of 400-500°C, 43. The method of embodiment 42, comprising, and preferably consisting of:

[0127] 47. Step (b.2') is (b.2'.1) forming a mixture of water and the impregnated first oxide material obtained in step (b.1'); (b.2'.2) setting the pH of the aqueous phase of the mixture obtained in step (b.2'.1) to a value in the range of 2 to 5, preferably in the range of 3.25 to 4.25, optionally by adding an acid, preferably an organic acid; (b.2'.3) preferably adding a source of oxide component to the mixture obtained in step (b.2'.2); (b.2'.4) preferably setting the pH of the aqueous phase of the mixture obtained in step (b.2'.3) to a value in the range of 6 to 8, preferably in the range of 6.5 to 7.5, optionally by adding a base, 46. The method of embodiment 45, comprising:

[0128] 48. Step (b.3') (b.3'.1) forming a mixture of water and particles of the mixed oxide; (b.3'.2) preferably adding an organic dispersant to the mixture obtained in step (b.3'.1); (b.3'.3) mixing a second oxide material into the mixture obtained in step (b.3'.1), preferably step (b.3'.2); (b.3'.4) preferably setting the pH of the aqueous phase of the mixture obtained in step (b.3'.3) to a value in the range of 6 to 8, preferably in the range of 6.5 to 7.5, optionally by adding a base, 48. The method of embodiment 46 or 47, comprising:

[0129] 49. The method of any one of Examples 42 to 48, wherein the disposing of one or more of the mixtures according to one or more of steps (b), (b.5), (b'.5), (b.5'), (B.5') and / or (b.8'), preferably steps (b), (b.5), (b'.5), (b.5'), (B.5') and (b.8'), is carried out by spraying or impregnating the substrate, preferably by impregnating the substrate in said mixture.

[0130] 50. According to steps (b.6), (b'.6), (b.6') and / or (B.6'), preferably according to steps (b.6), (b'.6), (b.6') and (B.6'), drying is carried out in a gas atmosphere having a temperature in the range of 60 to 200°C, preferably in the range of 90 to 160°C; The method according to any one of Examples 43 to 48, wherein the drying is preferably carried out in a gas atmosphere for a duration ranging from 10 to 240 minutes, more preferably for a duration ranging from 15 to 80 minutes, more preferably for a duration ranging from 20 to 60 minutes.

[0131] 51. The method of any one of Examples 42 to 50, wherein according to steps (b), (b.7), (b'.7), (b.7'), (B.7') and / or (b.10'), preferably according to steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), the calcination is carried out in a gas atmosphere having a temperature in the range of 425 to 475°C.

[0132] 52. The method according to any one of Examples 42 to 51, wherein the calcination is carried out in accordance with steps (b), (b.7), (b'.7), (b.7'), (B.7') and / or (b.10'), preferably steps (b), (b.7), (b'.7), (b.7'), (B.7') and (b.10'), in a gas atmosphere for a duration in the range of 10 to 240 minutes, preferably in the range of 15 to 80 minutes, more preferably in the range of 20 to 60 minutes.

[0133] 53. The method according to any one of embodiments 42 to 52, wherein the gas atmosphere comprises oxygen, and more preferably the atmosphere is air.

[0134] 54. The method of any one of embodiments 42-53, wherein the platinum group metal component in step (b) comprises one or more of palladium, platinum, rhodium, and iridium, preferably one or more of palladium, platinum, and rhodium, more preferably one or more of palladium and rhodium, more preferably palladium, and more preferably the source of the platinum group metal component comprises a salt of the platinum group metal component, more preferably a nitrate of a platinum group metal.

[0135] 55. The method of any one of embodiments 45-46, wherein the oxide component in step (b.2') is one or more of zirconia, silica, alumina, and titania, preferably one or more of zirconia and silica, more preferably zirconia.

[0136] 56. The method of any one of embodiments 42 to 55, comprising steps (a) and (b).

[0137] 57. An aqueous suspension comprising a source of platinum-group metal component, particles of a first oxide material, water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, a second oxide material, and preferably an oxide binder as defined in embodiment 22 or 23.

[0138] 58. A catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides, preferably obtainable or obtained by a process according to any one of embodiments 1 to 41, according to any one of embodiments 42 to 56.

[0139] 59. An exhaust gas treatment system for treating exhaust gases from an internal combustion engine, preferably a diesel engine, comprising a catalyst according to any one of embodiments 1 to 41 and 57, and one or more of an ammonia oxidation catalyst, a diesel oxidation catalyst, a selective catalytic reduction catalyst, and a catalyzed particulate filter.

[0140] 60. The system of embodiment 59, wherein the catalyst according to any one of embodiments 1 to 41 and 58 is the first catalyst of the system, and the system comprises a first ammonia oxidation catalyst arranged downstream of the catalyst according to any one of embodiments 1 to 41 and 58, and a catalytic soot filter arranged downstream of the first ammonia oxidation catalyst and preferably arranged upstream of the selective catalytic reduction catalyst, wherein the selective catalytic reduction catalyst comprised in the system is preferably arranged upstream of the second ammonia oxidation catalyst, and optionally a diesel oxidation catalyst arranged downstream of the first ammonia oxidation catalyst and upstream of the catalyzed soot filter.

[0141] 61. A method of using a catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides (NOx) according to any one of embodiments 1 to 41 and 58 for simultaneous selective catalytic reduction of NOx and oxidation of hydrocarbons.

[0142] 62. (1) providing a gas stream comprising one or more of NOx and hydrocarbons; (2) contacting the gas stream provided in step (1) with a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides (NOx) according to any one of embodiments 1 to 41 and 58; 1. A method for simultaneously oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides, comprising:

[0143] In the context of the present invention, the term "surface of an interior wall" is understood to mean the "naked" or "bare" or "blank" surface of the wall, i.e. the surface of the wall in its untreated state, composed of the wall material apart from unavoidable impurities which may contaminate the surface.

[0144] Furthermore, in the context of the present invention, in a statement that "X is one or more of A, B, and C," where X is a given mechanism and A, B, and C are specific embodiments of said mechanism, this statement is understood to disclose that X is either A, or B, or C, or A and B, or A and C, or B and C, or A, B, and C. It is noted that in this context, one skilled in the art can convert the above abstract matter into concrete examples, such as X being a chemical element and A, B, and C being specific elements, such as Li, Na, and K, or X being a temperature and A, B, and C being specific temperatures, such as 10°C, 20°C, and 30°C. With regard to this configuration, it is further noted that those skilled in the art will recognize that less specific embodiments of the above-described mechanism, e.g., "X is one or more of A and B," can be expanded to disclose X as A, or B, or A and B, or more specific embodiments, e.g., "X is one or more of A, B, C, and D," can be expanded to disclose X as A, or B, or C, or D, or A and B, or A and C, or A and D, or B and C, or B and D, or C and D, or A and B and C, or A and B and D, or B and C and D, or A and B and C, or A and B and C, or A and B and D, or B and C and D, or A and B and C and D.

[0145] Furthermore, in the context of the present invention, the term "consist of" in relation to the weight percent of one or more components refers to the weight percent amount of the component(s) described above, with the total being 100 weight percent. For example, the statement "0-0.001 weight percent of the bottom coat is composed of palladium" indicates that 0-0.001 weight percent of the components comprising the coat is palladium, with 100 weight percent being the components comprising the coat.

[0146] Finally, in the context of the present invention, the term "coating" refers to a covering disposed on the surface of the inner wall of a substrate, and said coating may comprise a single coat or multiple coats, preferably a single coat or two coats (two coats: a top coat and a bottom coat). Furthermore, in the context of the present invention, when preparing a coat or coating, the coating process may be repeated twice to achieve a target loading, and herein the "coat" or "coating" disclosed in the present invention may comprise one or more layers with the same chemical composition / catalytic activity that can only be distinguished using SEM analysis.

[0147] The present invention is further illustrated below using Reference Examples, Comparative Examples and Examples. [Example]

[0148] Example Reference Example 1 Measurement of Dv10, Dv50 and Dv90 values The particle size distribution was measured by static light scattering using a Sym-patec HELOS instrument, where the optical density of the sample was 5-10%.

[0149] Reference Example 2 Measurement of BET specific surface area The BET specific surface area was measured using liquid nitrogen according to DIN 66131 or DIN ISO 9277.

[0150] Reference Example 3: General Coating Methods To coat a flow-through substrate with one or more coats, the flow-through substrate was dipped vertically into a given mixture for a specific length (usually about 1 inch), filling the substrate with a predetermined amount of mixture. In this way, the mixture contacted the walls of the substrate. The substrate was held in the mixture for a specific period of time, usually 1 to 10 seconds. A vacuum was applied, drawing the mixture into the substrate. The substrate was then removed from the mixture. The substrate was rotated around its axis, pointing the dipped side up, and high-pressure air forced the mixture through the substrate.

[0151] Example 1 Preparation of a multifunctional mixed catalyst (using a Pd / zirconia component and a V-containing mixed oxide) Zirconium-based oxide support for Pd (BET specific surface area 67 m 2 Incipient wetness impregnation onto 88% by weight ZrO2 with 10% by weight La2O3 and 2% by weight HfO2, having a Dv50 of 3 microns and a Dv90 of 16 microns. The effective pore volume of the oxide support was first measured, and based on this volume, a volume of diluted palladium salt solution equal to the effective pore volume was prepared. This diluted solution was then added dropwise to the Zr-based oxide support over a period of 30 minutes under constant stirring to obtain a wet material. The resulting material was then calcined in an oven at 590°C and cooled. After calcination, the resulting powder was mixed with distilled water to obtain a 40% solids aqueous mixture, and the pH was adjusted to 3.75 using an organic acid. At this point, the slurry was milled until the Dv90 of the mixture particles was 10 microns.

[0152] Separately, a vanadium mixture was made by mixing iron vanadate (FeVO4 with a 1:1 molar ratio of Fe:V, a Dv50 of approximately 2 microns, and a Dv90 of approximately 11 microns) powder with distilled water. The solids content of the resulting mixture was 10 wt% based on the weight of the resulting mixture. A predetermined amount of iron vanadate was calculated so that the vanadium (from the iron vanadate), calculated as VO, was present at a final coating loading of 5% in the calcined catalyst (the FeVO4 loading, calculated as FeVO4, was 10.48% of the final coating loading in the calcined catalyst). To this mixture was added an acrylic-based dispersant (5 wt% based on the final coating loading), followed by tungsten-doped titania oxide (approximately 90 wt% TiO2 doped with 10 wt% WO3, a BET specific surface area of 90 m). 2 / g, Dv10 of 0.5 microns, Dv50 of 1.2 microns, and Dv90 of 3.7 microns) was added to the catalyst, resulting in a final titania + WO loading of 3.35 g / in 3The pH of the mixture was then set to 7 by adding a base. After this, aqueous colloidal silica binder was added to give a final SiO loading of 0.168 g / in after calcination. 3 The final solids content of the mixture was 43% by weight.

[0153] At this point, the Pd-impregnated ZrO mixture was mixed into the FeVO / TiO mixture, and the pH was again adjusted to 7. The final mixture was applied to a honeycomb flow-through monolith cordierite substrate (diameter: 26.67 cm (10.5 in) x length: 15.24 cm (6 in), 400 / (2.54) per square centimeter). 2 The substrate was then coated with the final mixture according to the coating method defined in Reference Example 3. The final mixture was then coated at a rate of 4.5 g / in. 3 To achieve the target washcoat loading of 1.0 g / in, the substrate was coated twice along its entire length, once from the inlet end of the substrate and once from the outlet end of the substrate, with each coating step followed by a drying and calcination step. To dry the coated substrate, the substrate was placed in an oven at 90°C for 30 minutes. After drying, the coated substrate was calcined at 590°C for 30 minutes. The final loading of the coating in the catalyst after calcination was 4.5 g / in. 3 So this is 3.35g / in 3 Titania + WO3, 0.47g / in 3 Calculated as FeVO4(V2O5), 0.025g / in 3 vanadium), 0.5g / in 3 of zirconia + HfO2 + La2O3, 0.167g / in 3 of silica and 15g / ft 3 The Pd loading was 0.05g.

[0154] Example 2.1 Preparation of a multifunctional layered catalyst (using Pd / alumina and V mixed oxide) Bottom Coating: Iron vanadate (FeVO4 with a 1:1 molar ratio of Fe:V) powder was mixed with distilled water. The solids content of the resulting mixture was 10 wt% based on the weight of the resulting mixture. A predetermined amount of iron vanadate was calculated so that the vanadium (from the iron vanadate) was present at a final loading of 5% of the coating in the catalyst after calcination, calculated as VO (the loading of FeVO4 was 10.48% of the final loading of the coating in the catalyst after calcination, calculated as FeVO4). An acrylic-based dispersant was added to the mixture, followed by the addition of tungsten-doped titania oxide (approximately 90 wt% TiO2 doped with 10 wt% WO3, BET specific surface area of 90 m). 2 / g, Dv10 of 0.5 microns, Dv50 of 1.2 microns, and Dv90 of 3.7 microns), resulting in a final titania + WO loading in the calcined catalyst of 3.41 g / in 3 The pH of the resulting mixture was set to 7. After this, aqueous colloidal silica binder was added to give a final SiO loading of 0.171 g / in after calcination. 3 This resulted in a final mixture solids content of 43% by weight, based on the weight of the mixture (together with the additional distilled water). A honeycomb flow-through monolith cordierite substrate (diameter: 26.67 cm (10.5 in) x length: 15.24 cm (6 in) with a 400 / (2.54) per square centimeter solids content of 400 / (2.54) per square centimeter was used. 2 4 g / in 2 of the final mixture was coated according to the coating method defined in Reference Example 3. 3 To achieve a target washcoat loading of 10 ... 3 So this is 3.41g / in 3 Titania + WO3, 0.419g / in 3 Calculated as FeVO4(V2O5), 0.2g / in 3vanadium) and 0.171g / in 3 It contained silica.

[0155] Top Coating Alumina-based oxide support for Pd (BET specific surface area 145 m 2 Incipient wetness impregnation onto gamma and delta alumina (20% ZrO2 and 3% La2O3 doped with palladium stearate, 0.1g / g, Dv50 of 32 microns, and Dv90 of 62.5 microns). First, the effective pore volume of a given oxide support was measured, and based on this volume, a volume of diluted palladium salt solution equal to the effective pore volume was prepared. This diluted solution was then added dropwise to the Al-based oxide support over a period of 30 minutes under constant stirring to obtain a wet material. The resulting material was then calcined in an oven at 590°C and cooled. After calcination, the resulting powder was mixed with distilled water to obtain a mixture, and the pH of the aqueous phase was adjusted to 3.75 using an organic acid. At this point, the slurry was milled until the particles of the mixture had a Dv90 of 10 microns.

[0156] After milling, a soluble zirconium binder was added to the mixture, calculated to be 11% of the Al-based oxide support. The resulting final mixture had a reduced solids content of 38% by weight, based on the weight of the final mixture. At this point, the mixture was ready to be placed onto a substrate already coated with a bottom coating. The bottom coating-coated substrate was then coated once over its entire length with the final mixture, according to the coating method defined in Reference Example 3. Drying conditions were the same as in Example 1; however, after drying, the coated substrate was calcined at 450°C for 30 minutes. The final loading of the top coating in the catalyst after calcination was 0.5 g / in. 3 So this is 0.44g / in 3 Al-based oxide support, 0.056 g / in 3 of zirconia and 15g / ft 3 The Pd loading was 0.05g.

[0157] Example 2.2 Preparation of a multifunctional layered catalyst (using Pd / zirconia and V mixed oxides) Bottom Coating The bottom coating of Example 2.2 was prepared as in Example 2.1. Thus, the final loading of the bottom coating in the catalyst after calcination was 4 g / in 3 So this is 3.41g / in 3 Titania + WO3, 0.419g / in 3 Calculated as FeVO4(V2O5), 0.2g / in 3 vanadium) and 0.17g / in 3 It contained silica.

[0158] Top Coating : Alumina-based oxide support is replaced with zirconium-based oxide support (BET specific surface area 67m 2 The top coating of Example 2.2 was prepared like the top coating of Example 2.1, except that the 88 wt.% ZrO2 with 10 wt.% La2O3 and 2 wt.% HfO2 was substituted with 88 wt.% ZrO2 / g, Dv50 of 3 microns and Dv90 of 16 microns. Thus, the final loading of the top coating in the catalyst after calcination was 0.5 g / in 3 So this is 0.435g / in 3 Zr-based oxide support, 0.056 g / in 3 of zirconia and 15g / ft 3 The Pd loading was 0.05g.

[0159] Example 3 Testing of Examples 1, 2.1 and 2.2 - DeNOx and N2O Formation The NOx conversion and nitrogen oxide (NO) formation of the fresh catalysts of Examples 1, 2.1 and 2.2 were investigated at different temperatures, i.e., 200-325°C (GHSV: 200, 240, 275, 300 and 325°C) for 40,000 h. -1). The catalyst was allowed to stabilize at each loading point, and then urea was dosed at an ANR (ammonia to NOx ratio) of either 1.5 (200 and 240°C), 1.2 (275°C), or 1.0 (300 and 325°C) until NH3 slip was observed, indicating NH3 saturation of the catalyst. At each temperature, if the ANR pre-conditioning was greater than 1.0, the ANR was reduced to 1.0 and the system was allowed to reach equilibrium, where exhaust emissions were monitored. The results are shown in Figures 1 and 2.

[0160] As can be seen from Figure 1, all three Pd-containing V-SCR catalysts provided high levels of NOx conversion, indicating that PGM does not oxidize a significant portion of NH3 under these conditions and that the catalyst may be used without concern for NH3 oxidation up to at least 325°C. In fact, only Example 2.1 showed any signs of NH3 oxidation at 325°C, while Examples 1 and 2.2 still maintained 100% conversion at 325°C.

[0161] As can be seen from Figure 2, all three catalysts produce low levels of N2O; however, Examples 1 and 2.1 produce less N2O across all measured temperatures.

[0162] Comparative Example 1 Preparation of a mixed catalyst (using Pd / zirconia and Cu-zeolite) The catalyst of Comparative Example 1 was prepared by dissolving iron vanadate on a titania support in a Cu-CHA zeolite material (calculated as Cu:CuO, 3.25 wt. % based on the weight of Cu-CHA, CHA having a Dv90 of 25 microns, SiO:AlO of 31, and a BET specific surface area of approximately 625 m). 2 The catalyst was prepared in the same manner as in Example 1, except that the coating was replaced with a soluble zirconium solution (30 wt. % ZrO) as a binder, but no colloidal silica binder was added to the mixture containing water and Cu-CHA. The final loading of the coating in the catalyst after calcination was 3.0 g / in. 3 So this is 2.56g / in 3of Cu-CHA, 0.3 g / in 3 of zirconia + HfO3 + La2O3, 0.13g / in 3 of zirconia and 15g / ft 3 It contained a Pd loading of .

[0163] Comparative Example 2 Preparation of a mixed catalyst (using Pd / ceria-zirconia and Cu-zeolite) The catalyst of Comparative Example 2 was prepared by replacing the zirconium-based oxide support with a Ce / Zr oxide support (40 wt. % ceria, 50 wt. % zirconia + HfO, 5 wt. % LaO, and 5 wt. % PrO). 11 , BET specific surface area is 80m 2 The catalyst was prepared in the same manner as in Comparative Example 1, except that the coating was replaced with a 3.0 g / in 2 catalyst (Dv90 15 micrometers). The final loading of the coating in the catalyst after calcination was 3.0 g / in 2 3 So this is 2.56g / in 3 of Cu-CHA, 0.3 g / in 3 of ceria + zirconia + lanthanum + praseodymium, 0.13 g / in 3 of zirconia and 15g / ft 3 It contained a Pd loading of .

[0164] Example 4 Testing of Examples 1, 2.1 and 2.2 and Comparative Examples 1-3 - Light-Off Performance Hydrocarbons were injected upstream of the catalysts of Examples 1, 2.1 and 2.2 and Comparative Examples 1-2 at different inlet temperatures (275°C, 290°C, 305°C, and 320°C) to determine whether it was possible to obtain a target temperature of 450°C at the outlet end of each catalyst (space velocity: 60 kJ / h).

[0165] As can be seen from Figure 3, using the catalyst of Example 2.1 (layered catalyst-2 coat), it was possible to achieve a target outlet temperature of 450°C after HC injection at an inlet temperature of 275°C. Meanwhile, using the catalysts of Comparative Examples 1 and 2 (mixed catalysts), outlet temperatures of only 275°C to 320°C were achieved after HC injection at inlet temperatures of 275°C, 290°C, 305°C, and 320°C, respectively. In these comparative examples, the inlet and outlet temperatures were the same. This indicates that HC oxidation is minimal or absent on these catalysts, and that the HC oxidation reaction is rapidly suppressed. The catalyst from Example 2.1 achieved a target outlet temperature of 450°C at all four inlet temperature stages, while the catalyst from Example 2.2 reached a target outlet temperature of 450°C at inlet temperatures of 290°C and above. This clearly demonstrates the activity for HC oxidation from the catalysts of Examples 2.1 and 2.2, despite the same Pd loading as Comparative Examples 2 and 3.

[0166] Furthermore, using the catalyst of Example 1 (mixed catalyst), it was possible to obtain an elevated outlet temperature of 350°C after HC injection at an inlet temperature of 305°C, and an elevated outlet temperature of 410°C at an inlet temperature of 320°C.

[0167] In contrast, in the catalysts of Comparative Examples 1 and 2 (mixed catalysts using Cu-CHA and not using V mixed oxides), it was only possible to obtain an exothermic state after HC injection, but the outlet temperature was always the same as the inlet temperature. Therefore, this example demonstrates that the presence of V mixed oxides can enhance the HC ignition performance in multifunctional catalysts.

[0168] Example 6 Testing of Examples 1, 2.1, 2.2 and Comparative Example 1 - DeNOx and N2O Formation - US + FTP + WHTC To obtain the data shown in Figure 4, each catalyst was separately installed in an engine test cell (downstream from a 6.7 L diesel engine and urea injector). Each catalyst measured 10.5" x 6". NOx conversion and NO formation were evaluated via the US-FTP and WHTC transient cycles, where the test cell engine produced approximately 6.8 and 6.0 g / kWh, respectively. To ensure equilibrium, a given transient cycle was run 13 times: two at ANR = 0.1, five at ANR = 0.8, three at ANR = 1.0, and three at ANR = 1.2. The data shown here is from the final cycle at ANR = 1.2. DeNOx is reported as mass-averaged NOx conversion, and NO formation is reported as g / kWh based on the power produced over the cycle.

[0169] As can be seen from Figure 4, the deNOx activity of Examples 1 and 2.1 was only slightly inferior to Comparative Example 2 over the US-FTP cycle. Over the somewhat warmer WHTC cycle, Examples 1, 2.1, and 2.2 all had comparable conversion.

[0170] Importantly, Examples 1, 2.1, and 2.2 produced less N2O over the US-FTP cycle compared to Comparative Example 1, an important attribute for meeting current and future legislation.

[0171] Cited literature -US2015 / 0375207A1 -US5371056 -WO2018 / 224651A2

Claims

1. 1. A catalyst for oxidizing hydrocarbons and selective catalytic reduction of nitrogen oxides, comprising: (i) a substrate including an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (ii) a coating disposed on the surface of the interior wall of the substrate; Including, the surface defines an interface between the passageway and the interior wall, the coating comprising a platinum group metal component supported on a first oxide material, and further comprising a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, the mixed oxide supported on a second oxide material; and A catalyst characterized in that the amount of zeolite in the coating is in the range of 0 to 0.1% by mass.

2. The catalyst described in claim 1, characterized in that the coating does not contain zeolite.

3. 10. The catalyst of claim 1, wherein the first oxide material comprises one or more oxides.

4. 4. The catalyst according to claim 3, wherein 75 to 100% by weight of the first oxide material is composed of zirconia.

5. The coating may include a first oxide material in an amount of 15.26 to 61.02 g / l (0.25 to 1 g / in ３ 5. The catalyst according to claim 1, wherein the catalyst is contained in a loading amount in the range of 0.1 to 1.0% by weight.

6. 6. The catalyst according to claim 1, wherein the mixed oxide is a mixed oxide of vanadium and one or more of iron, erbium, bismuth, aluminum, and antimony.

7. 7. The catalyst according to claim 1, wherein the second oxide material supporting the mixed oxide comprises one or more oxides.

8. 8. The catalyst according to claim 1, wherein the coating further comprises an oxide binder.

9. The catalyst provides the coating with a solubility of 152.6 to 610.2 g / l (2.5 to 10 g / in ３ 9. The catalyst according to claim 1, wherein the catalyst is contained in a loading amount in the range of 0.1 to 1.0% by weight.

10. (ii) the coating according to (ii.1) a bottom coat comprising said mixed oxide supported on a second oxide material; (ii.2) a top coat comprising said platinum group metal component supported on a first oxide material; Including, the bottom coat is disposed on the inner wall surface of the substrate over x% of the substrate axial length, where x is in the range of 90 to 100; 10. The catalyst of claim 1, wherein the top coat is disposed on the bottom coat over y % of the substrate axial length, where y is in the range of 90 to 100.

11. Catalyst according to claim 10, characterized in that 0 to 0.001% by weight of the bottom coat according to (ii.1) is composed of palladium.

12. 10. The catalyst according to any one of claims 1 to 9, characterized in that the coating according to (ii) consists of one coat, which coat is disposed on the surface of the inner wall of the substrate over z % of the axial length of the substrate, where z is in the range of 90 to 100.

13. A process for producing a catalyst for the oxidation of hydrocarbons and the selective catalytic reduction of nitrogen oxides according to any one of claims 1 to 12, comprising the steps of: (a) providing a substrate including an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end, and a plurality of passages defined by interior walls of the substrate extending through the substrate; (b) providing one or more mixtures comprising a source of a platinum group metal component, particles of a first oxide material, water, particles of a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum, and antimony, and a second oxide material; disposing the one or more mixtures over z % of the substrate axial length, where z is in the range of 90 to 100; calcining the one or more mixtures disposed on the substrate; A method comprising:

14. The method of claim 13, wherein the mixture prepared in step (b) includes an oxide binder.

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