Air filtration using manganese oxide

Patent metadata

Field	Value
Publication number	US-9751077-B2
Application number	US-201615090725-A
Country	US
Kind code	B2
Filing date	Apr 5, 2016
Priority date	Sep 30, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

In various implementations, a filter may include a substrate and manganese oxide coupled to the substrate. The filter may at least remove particles and/or chemicals from a gaseous stream. In some implementations, the filter may be capable of degrading at least one of formaldehyde or ozone present in a gaseous stream.

First claim

What is claimed is:

1. A filter comprising:
a first substrate comprising pores through which a gaseous stream may at least partially pass, wherein the first substrate comprises:
a first side; and
an opposing second side;
wherein the gaseous stream passing at least partially through the first substrate contacts at least a portion of the first side prior to contacting the opposing second side; and

one or more manganese oxides coupled to the second side of the first substrate,
wherein the one or more manganese oxides comprises at least one powdered manganese oxide;
wherein the filter is adapted to remove at least a portion of one or more predetermined compounds from the gaseous stream by degrading the one or more predetermined compounds.

2. The filter of claim 1 , wherein at least one of the manganese oxides comprises manganese (II) oxide, manganese dioxide, or manganese (III) oxide.

3. The filter of claim 1 , further comprising one or more other compounds combined with at least one of the manganese oxides.

4. The filter of claim 3 , wherein one or more of the other compounds comprises at least one of an activated carbon, a zeolite, a titanium oxide, or an aluminum oxide.

5. The filter of claim 1 , wherein the filter is further adapted to remove particles less than a predetermined size from the gaseous stream.

6. The filter of claim 1 :
wherein one or more of the predetermined compounds comprises at least one of ozone or formaldehyde; and
wherein the filter degrades at least one of ozone or formaldehyde to remove at least a portion of one or more of the predetermined compounds from the gaseous stream.

7. The filter of claim 1 , wherein one or more of the predetermined compounds comprises at least one of an aldehyde, ozone, an inorganic acid, an alcohol, or a ketone.

8. The filter of claim 1 , further comprising a second substrate coupled to the first side of the first substrate.

9. The filter of claim 1 , further comprising at least one additional substrate coupled to the first substrate.

10. A filter system comprising:
two or more substrates comprising pores through which a gaseous stream may at least partially pass, wherein at least two of the substrates comprise:
a first substrate; and
a second substrate; and

one or more manganese oxides disposed between the first substrate and the second substrate, wherein the one or more manganese oxides comprises at least one powdered manganese oxide;
wherein the filter system is adapted to remove one or more predetermined compounds from the gaseous stream by degrading the one or more predetermined compounds.

11. The filter system of claim 10 , wherein one or more of the manganese oxides is coupled to a third substrate, and wherein the third substrate is disposed between the first substrate and the second substrate.

12. The filter system of claim 11 , wherein the third substrate comprises a polymer film.

13. The filter system of claim 10 , wherein the first substrate comprises:
a first side; and
an opposing second side;
wherein at least one of the manganese oxides is coupled to the opposing second side of the first substrate; and
wherein the gaseous stream passing at least partially through the first substrate contacts at least a portion of the first side prior to contacting the opposing second side.

14. The filter system of claim 10 , wherein one or more of the substrates comprises at least one of a pleated substrate, a metal honeycomb, fibers, ceramic, quartz, polymer film, paper, or cotton.

15. The filter system of claim 10 , further comprising one or more additional substrates coupled to at least one of the first substrate or the second substrate.

16. The filter system of claim 10 , wherein the filter system is further adapted to remove at least a portion of one or more predetermined compounds from the gaseous stream at temperatures greater than 0 degrees Fahrenheit and less than approximately 125 degrees Fahrenheit.

17. A method of filtering one or more gaseous streams, the method comprising:
allowing a gaseous stream with a temperature greater than 0 degrees Fahrenheit and less than approximately 125 degrees Fahrenheit to at least partially pass through a filter; wherein the filter comprises:
one or more substrates comprising pores through which the gaseous stream may at least partially pass;
wherein at least one of the substrates comprise a first substrate;
wherein the first substrate comprises a first side and an opposing second side; wherein the gaseous stream passing at least partially through the filter contacts at least a portion of the first side prior to contacting the opposing second side; and
one or more manganese oxides coupled to the second side of at least one of the first substrates, wherein the one or more manganese oxides comprises at least one powdered manganese oxide; and
removing at least a portion of one or more predetermined compounds from the gaseous stream by degrading the one or more predetermined compounds as the gaseous stream passes at least partially through the filter.

18. The method of claim 17 , wherein removing at least a portion of one or more of the predetermined compounds from the gaseous stream comprises degrading at least a portion of one or more of the predetermined compounds in the gaseous stream.

19. The method of claim 17 , wherein one or more of the predetermined compounds comprises at least one of formaldehyde or ozone.

20. The method of claim 19 , wherein removing at least a portion of one or more of the predetermined compounds from the gaseous stream comprises degrading at least one of formaldehyde or ozone.

Assignees

• Lennox Ind Inc

Inventors

• Hingorani Sanjeev
• Greist Henry

Classifications

• F02M35/02441

  Materials or structure of filter elements, e.g. foams · CPC title

• B01D2259/4508

  for cleaning air in buildings · CPC title

• B01D2253/102

  Carbon · CPC title

• B01D53/885

  Devices in general for catalytic purification of waste gases · CPC title

• B01D2259/4566

  for use in transportation means · CPC title