Method for the treatment of an exhaust gas and an HVAC system

Patent metadata

Field	Value
Publication number	US-11980868-B2
Application number	US-202217820012-A
Country	US
Kind code	B2
Filing date	Aug 16, 2022
Priority date	Aug 27, 2021
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

The present invention relates to a method for the treatment of an exhaust gas comprising carbon monoxide (CO) and/or one or more volatile organic compounds (VOCs) using a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La. The present invention also relates to an HVAC system comprising a PGM-free catalyst article.

First claim

The invention claimed is:

1. A method for the treatment of an exhaust gas comprising carbon monoxide (CO) and/or one or more volatile organic compounds (VOCs), the method comprising, contacting the exhaust gas with a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La.

2. The method according to claim 1 , wherein the mixed oxide comprises 40 to 50 wt % Mn and at least 5 wt % Cu, on a metal-only basis.

3. The method according to claim 1 , wherein the mixed oxide comprises, on a metal-only basis:
40 to 50 wt % Mn;
6 to 8 wt % Cu;
3 to 6 wt % Mg;
1 to 3 wt % Al;
35 to 45 wt % La.

4. The method according to claim 3 , wherein the mixed oxide consists essentially of Mn, Cu, Mg, Al, La, and oxygen.

5. The method according to claim 1 , wherein the mixed oxide comprises, on a metal-only basis:
42 to 48 wt % Mn;
about 7 wt % Cu;
about 4.5 wt % Mg;
about 2 wt % Al; and
39 to 43 wt % La.

6. The method according to claim 1 , wherein a molar ratio of Mn to La is from 2.5:1 to 3:1.

7. The method according to claim 1 , wherein the VOCs comprise one or more compounds selected from the group consisting of methanol, ethanol, acetaldehyde, formaldehyde, propene and ethylene.

8. The method according to claim 1 , wherein the exhaust gas is from an HVAC system or is a tail-gas from a chemical synthesis process.

9. The method according to claim 1 , wherein the exhaust gas is from a terephthalic acid synthesis process.

10. An HVAC system comprising a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La.

11. An HVAC system of claim 10 , wherein the mixed oxide comprises, on a metal-only basis:
40 to 50 wt % Mn;
6 to 8 wt % Cu;
3 to 6 wt % Mg;
1 to 3 wt % Al; and
35 to 45 wt % La.

Assignees

• Johnson Matthey Plc

Inventors

• Alcove Clave Silvia
• Doura Kevin
• Fedeyko Joseph

Classifications

• B01J23/002 Primary

  Mixed oxides other than spinels, e.g. perovskite · CPC title

• B01D53/864

  Removing carbon monoxide or hydrocarbons · CPC title

• B01D53/8687

  Organic components · CPC title

• B01J21/02

  Boron or aluminium; Oxides or hydroxides thereof · CPC title

• B01J23/72

  Copper · CPC title