Exhaust gas joule heater

Patent metadata

Field	Value
Publication number	US-12305552-B2
Application number	US-202318524127-A
Country	US
Kind code	B2
Filing date	Nov 30, 2023
Priority date	Mar 31, 2020
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

An apparatus for the catalytic treatment of gas having a casing and a catalytic article within the casing wherein the catalytic article comprises a ceramic honeycomb monolith which hosts a metallic track containing at least one least one metal, metal alloy, or an inorganic oxide.

First claim

The invention claimed is:

1. An apparatus for the catalytic treatment of gas comprising:
i. a casing having a gas inlet and a gas outlet; and
ii. a ceramic honeycomb monolith having an inlet end surface at an inlet end thereof, and an outlet end surface at an outlet end thereof, and a plurality of channels through which gas can flow, wherein the channels extend from the inlet surface to the outlet surface, and a metallic coating within a trench manufactured by stereolithography or three-dimensional screen printing,
wherein the coated trench forms a metallic track,
wherein the metallic coating contains at least one metal, metal alloy, or an inorganic oxide selected from titania, zirconia, and zeolite, and
wherein the metallic coating is hosted on the ceramic honeycomb monolith disposed within the casing.

2. The apparatus of claim 1 , wherein the apparatus is suitable for catalyzing the conversion of one or more of the components of the gas.

3. The apparatus of claim 2 , wherein the conversion involves reduction.

4. The apparatus of claim 2 , wherein the conversion involves oxidation.

5. The apparatus of claim 2 , wherein the metallic coating contains an inorganic oxide selected from titania, zirconia, and zeolite.

6. The apparatus of claim 2 , wherein the metallic coating contains at least one metal or metal alloy.

7. The apparatus of claim 6 , wherein the metal or metal alloy is one of silver, gold, platinum, rhodium, ruthenium, iron, chromium, titanium, an alloy of one or more thereof, or nichrome.

8. The apparatus of claim 6 , wherein the metal is iron, chromium, titanium, an alloy of one or more thereof, or nichrome.

9. The apparatus of claim 6 , wherein the metal is iron or iron alloy.

10. The apparatus of claim 6 , wherein the metal is chromium or chromium alloy.

11. The apparatus of claim 6 , wherein the metal is titanium or titanium alloy.

12. The apparatus of claim 6 , wherein the metal is silver, silver oxide, or silver alloy.

13. The apparatus of claim 6 , wherein the metal is gold or gold alloy.

14. The apparatus of claim 2 , wherein the metallic coating comprises metal on the inlet end surface of the monolith.

15. The apparatus of claim 2 , wherein the metallic coating comprises metal on the outlet end surface of the monolith.

16. The apparatus of claim 1 , wherein the substrate has a tubular shape.

17. The apparatus of claim 1 , wherein the substrate has a cylindrical shape.

Assignees

• Johnson Matthey Plc

Inventors

• Fonte Carlos
• Gregori Gregory
• Jones Nigel
• Morgan Chris
• OAKES Daniel
• O'Connell Timothy

Classifications

• F01N2240/16

  an electric heater, i.e. a resistance heater · CPC title

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title

• F01N3/103

  Oxidation catalysts for HC and CO only · CPC title

• F01N3/101

  Three-way catalysts · CPC title

• F01N3/0222

  the structure being monolithic, e.g. honeycombs · CPC title