# US 10,500,571 B2 · ASC with platinum group metal in multiple layers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,571 B2 - Document ID: US10500571B2 - Status: Granted - Kind: B2 - Application number: 15/938,202 - Filed: 2018-03-28 - Published: 2018-10-04 - Granted: 2019-12-10 - Earliest claimed: 2017-03-29 - Assignees: Johnson Matthey Public Limited Company - Applicants: Johnson Matthey Public Limited Company - Inventors: Neil Greenham; Jing Lu; Andrew Newman - Web page: https://patentgrep.com/patent/US10500571B2 ## CPC - B01J 29/76: Iron group metals or copper - B01D 53/9418: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas} - B01D 53/9436: {Ammonia} - B01D 53/9468: {in different layers} - B01D 53/9472: {in different zones} - B01J 23/42: Platinum - B01J 29/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively - B01J 29/44: Noble metals - B01J 29/72: containing iron group metals, noble metals or copper - B01J 29/723: {CHA-type, e.g. Chabazite, LZ-218} - B01J 35/19: {Catalysts containing parts with different compositions} - B01J 37/0215: {Coating} - B01J 37/0236: {Drying, e.g. preparing a suspension, adding a soluble salt and drying} - B01J 37/0244: {Coatings comprising several layers} - B01J 37/0246: {Coatings comprising a zeolite} - B01J 37/0248: {Coatings comprising impregnated particles} - B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 3/28: Construction of catalytic reactors - F01N 13/0097: {the purifying devices are arranged in a single housing} - B01D 2255/1021: Platinum - B01D 2255/20738: Iron - B01D 2255/20761: Copper - B01D 2255/50: Zeolites - B01D 2255/9022: Two layers - B01D 2255/9032: Two zones - B01D 2255/9035: Three zones - B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths - F01N 2510/063: zeolites - F01N 2570/14: Nitrogen oxides - F01N 2570/18: Ammonia - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - Y02T 10/12: Improving ICE efficiencies - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A catalytic article for treating an exhaust gas stream containing particulate matter, hydrocarbons, CO, and ammonia, the article may include: (a) a substrate having an inlet end and an outlet end defining an axial length; (b) a first catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; and (c) a second catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve. ## Claims ### Claim 1 A catalytic article for treating an exhaust gas stream containing particulate matter, hydrocarbons, CO, and ammonia, the article comprising: a. a substrate having an inlet end and an outlet end defining an axial length; b. a first catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; c. a second catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve, wherein a. the first catalyst coating extends from the outlet end toward the inlet end, covering less than the entire axial length of the substrate; and b. the second catalyst coating extends from the inlet end toward the outlet end, covering less than the entire axial length of the substrate and overlapping a portion of the first catalyst coating. ### Claim 2 (depends on 1) The catalytic article of claim 1, wherein the molecular sieve in the first and/or second coating comprises a zeolite. ### Claim 3 (depends on 1) The catalytic article of claim 1, wherein the base metal in the first and/or second coating comprises copper, iron, or a combination thereof. ### Claim 4 (depends on 1) The catalytic article of claim 1, wherein the first coating and second coating each comprise platinum distributed on a zeolite and copper distributed on a zeolite. ### Claim 5 (depends on 1) The catalytic article of claim 1, wherein the first coating includes a higher platinum group metal loading than the second coating. ### Claim 6 (depends on 1) The catalytic article of claim 1, wherein the first coating and the second coating include an equivalent platinum group metal loading. ### Claim 7 (depends on 1) The catalytic article of claim 1, wherein first coating comprises a platinum group metal loading of about 0 g/ft3 to about 10 g/ft3, or about 1 g/ft3 to about 5 g/ft3. ### Claim 8 (depends on 1) The catalytic article of claim 1, wherein the second coating comprises a platinum group metal of about 0 g/ft3 to about 5 g/ft3; or about 1 g/ft3 to about 3 g/ft3. ### Claim 9 (depends on 1) The catalytic article of claim 1, wherein the weight ratio of platinum group metal in the first coating to the platinum group metal in the second coating is from about 20:1 to about 1:3; about 20:1 to about 1:1; about 10:1 to about 1:2; about 10:1 to about 1:1; about 6:1 to about 1:1; about 3:1 to about 1:1; or about 3:0.5 to about 1:1. ### Claim 10 (depends on 1) The catalyst article of claim 1, wherein the first catalyst coating and the second catalyst coating overlap to form three zones, a first zone to primarily remove NOx, a second zone to primarily oxidize ammonia to N2, and a third zone to primarily oxidize carbon monoxide and hydrocarbons. ### Claim 11 (depends on 1) The catalyst article of claim 1, wherein the substrate comprises an extruded SCR. ### Claim 12 (depends on 1) The catalyst article of claim 1, wherein the substrate comprises an extruded SCR. ### Claim 13 (depends on 1) The catalyst article of claim 1, wherein the substrate comprises an extruded SCR. ### Claim 14 An emissions treatment system comprising: a. a diesel engine emitting an exhaust stream including particulate matter, NOx, and carbon monoxide; b. an SCR catalyst; c. a catalytic article comprising: i. a substrate having an inlet end and an outlet end defining an axial length; ii. a first catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; iii. a second catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; the catalytic article located downstream of the SCR catalyst, wherein the SCR catalyst and the ASC catalyst are located on a single substrate, and the SCR catalyst is located on an inlet side of the substrate and the ASC catalyst is located on the outlet side of the substrate. ### Claim 15 (depends on 1) A method of reducing emissions from an exhaust stream, comprising contacting the exhaust stream with the catalyst article of claim 1. ### Claim 16 A catalytic article for treating an exhaust gas stream containing particulate matter, hydrocarbons, CO, and ammonia, the article comprising: a. a substrate having an inlet end and an outlet end defining an axial length; b. a first catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; c. a second catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve, wherein a. the first catalyst coating extends from the outlet end toward the inlet end, covering less than the entire axial length of the substrate; and b. the second catalyst coating covers the entire axial length of the substrate and overlaps the first catalyst coating. ### Claim 17 (depends on 16) The catalytic article of claim 16, wherein the molecular sieve in the first and/or second coating comprises a zeolite. ### Claim 18 (depends on 16) The catalytic article of claim 16, wherein the base metal in the first and/or second coating comprises copper, iron, or a combination thereof. ### Claim 19 (depends on 16) The catalytic article of claim 16, wherein the first coating and second coating each comprise platinum distributed on a zeolite and copper distributed on a zeolite. ### Claim 20 (depends on 16) The catalytic article of claim 16, wherein the first coating includes a higher platinum group metal loading than the second coating. ### Claim 21 (depends on 16) The catalytic article of claim 16, wherein the first coating and the second coating include an equivalent platinum group metal loading. ### Claim 22 (depends on 16) The catalytic article of claim 16, wherein first coating comprises a platinum group metal loading of about 0 g/ft3 to about 10 g/ft3, or about 1 g/ft3 to about 5 g/ft3. ### Claim 23 (depends on 16) The catalytic article of claim 16, wherein the second coating comprises a platinum group metal of about 0 g/ft3 to about 5 g/ft3; or about 1 g/ft3 to about 3 g/ft3. ### Claim 24 (depends on 16) The catalytic article of claim 16, wherein the weight ratio of platinum group metal in the first coating to the platinum group metal in the second coating is from about 20:1 to about 1:3; about 20:1 to about 1:1; about 10:1 to about 1:2; about 10:1 to about 1:1; about 6:1 to about 1:1; about 3:1 to about 1:1; or about 3:0.5 to about 1:1. ### Claim 25 A catalytic article for treating an exhaust gas stream containing particulate matter, hydrocarbons, CO, and ammonia, the article comprising: a. a substrate having an inlet end and an outlet end defining an axial length; b. a first catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve; c. a second catalyst coating including: 1) a platinum group metal distributed on a molecular sieve, and 2) a base metal distributed on a molecular sieve, wherein a. the first catalyst coating covers the entire axial length of the substrate; and b. the second catalyst coating extends from the inlet end toward the outlet end, covering less than the entire axial length of the substrate and overlapping a portion of the first catalyst coating. ### Claim 26 (depends on 25) The catalytic article of claim 25, wherein the molecular sieve in the first and/or second coating comprises a zeolite. ### Claim 27 (depends on 25) The catalytic article of claim 25, wherein the base metal in the first and/or second coating comprises copper, iron, or a combination thereof. ### Claim 28 (depends on 25) The catalytic article of claim 25, wherein the first coating and second coating each comprise platinum distributed on a zeolite and copper distributed on a zeolite. ### Claim 29 (depends on 25) The catalytic article of claim 25, wherein the first coating includes a higher platinum group metal loading than the second coating. ### Claim 30 (depends on 25) The catalytic article of claim 25, wherein the first coating and the second coating include an equivalent platinum group metal loading. ### Claim 31 (depends on 25) The catalytic article of claim 25, wherein first coating comprises a platinum group metal loading of about 0 g/ft3 to about 10 g/ft3, or about 1 g/ft3 to about 5 g/ft3. ### Claim 32 (depends on 25) The catalytic article of claim 25, wherein the second coating comprises a platinum group metal of about 0 g/ft3 to about 5 g/ft3, or about 1 g/ft3 to about 3 g/ft3. ### Claim 33 (depends on 25) The catalytic article of claim 25, wherein the weight ratio of platinum group metal in the first coating to the platinum group metal in the second coating is from about 20:1 to about 1:3; about 20:1 to about 1:1; about 10:1 to about 1:2; about 10:1 to about 1:1; about 6:1 to about 1:1; about 3:1 to about 1:1; or about 3:0.5 to about 1:1.