# US 2013/0156670 A1 · Catalyst Systems And Methods For Treating Aircraft Cabin Air

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2013/0156670 A1
- Document ID: US20130156670A1
- Status: Published application
- Kind: A1
- Application number: 13/770,688
- Filed: 2013-02-19
- Published: 2013-06-20
- Earliest claimed: 2008-12-18
- Assignees: BASF SE
- Inventors: Michael P. Galligan; Mark Buelow; Martin Volland; Pascaline Harrison Tran; Bruce J. Frishberg
- Web page: https://patentgrep.com/patent/US20130156670A1

## CPC

- B64D 13/06: the air being conditioned (pressurising B64D13/02)
- B01D 53/00: Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, (recovery of volatile solvents by condensation B01D5/00; sublimation B01D7/00; cold traps, cold baffles B01D8/00; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G70/00; cleaning coal gas C10K; working-up of natural gas, or synthetic natural gas, C10L3/10; separation of difficult-to-condense gases or air by liquefaction F25J; for investigating materials G01N30/00)
- B01D 53/8675: {Ozone}
- B01D 53/9477: {with catalysts positioned on separate bricks, e.g. exhaust systems}
- B01D 2255/20: Metals or compounds thereof
- B01D 2255/206: Rare earth metals
- B01D 2255/2073: Manganese
- B01D 2255/20738: Iron
- B01D 2255/2092: Aluminium
- B01D 2259/4508: for cleaning air in buildings
- B01D 2259/4575: in aeroplanes or space ships
- B64D 2013/0685: {with ozone control}
- F24F 8/98: for removing ozone
- Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02T 50/40: Weight reduction
- Y02T 50/50: On board measures aiming to increase energy efficiency
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- 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)
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Air treatment catalyst systems and methods for treating the air in the aircraft cabin environment are provided. The catalyst system and method remove ozone, volatile organic compounds, NOx and other pollutants. The catalyst system used to treat the cabin air comprises a plurality of discrete substrates having an ozone abatement catalyst loaded thereon and arranged in a stacked configuration between a source of the air stream and the passenger cabin, the at least the first two substrates adjacent the source of the air stream comprise an iron-based alloy.

## Claims

### Claim 1

A catalyst system for treating ozone in an air stream entering a passenger cabin of an aircraft, comprising a plurality of serially arranged, discrete substrates having an ozone abatement catalyst loaded thereon and arranged in a stacked configuration between a source of the air stream and the passenger cabin, at least the first two substrates adjacent the air stream comprising an iron-based alloy.

### Claim 2 (depends on 1)

The catalyst system of claim 1, wherein each substrate comprises a honeycomb.

### Claim 3 (depends on 2)

The catalyst system of claim 2, wherein at least the first two substrates comprise an iron-chromium alloy.

### Claim 4 (depends on 3)

The catalyst system of claim 3, wherein the iron-chromium alloy comprises iron in the range of about 60 weight % to about 80.0 weight %, chromium in the range of about 15 weight % to about 30 weight %, aluminum in the range of about 2 weight % to about 10 weight %, and lanthanum and cerium combined in an amount of less than about 1 weight %.

### Claim 5 (depends on 4)

The catalyst system of claim 4, wherein the iron-chromium alloy comprises iron in the range of about 70 weight % to about 80 weight %, chromium in the range of about 20 weight % to about 25 weight %, aluminum in the range of about 4 weight % to about 8 weight %, and lanthanum and cerium combined in an amount of less than about 0.5 weight %.

### Claim 6 (depends on 3)

The catalyst system of claim 3, wherein the iron-chromium alloy comprises iron in the range of about 76 weight % to about 80 weight %, chromium in the range of about 14 weight % to about 17%, aluminum in the range of about 5 weight % to about 6 weight %, carbon up to about 0.5 weight %, manganese up to about 1 weight %, silicon up to about 1 weight % and sulfur up to about 0.5 weight %.

### Claim 7 (depends on 3)

The catalyst system of claim 3, wherein the iron-based alloy has a density in the range of about 6.9 g/cm3 to about 7.2 g/cm3.

### Claim 8 (depends on 3)

The catalyst system of claim 3, wherein substrates disposed downstream of at least the first two substrates comprise aluminum.

### Claim 9 (depends on 3)

The catalyst system of claim 3, wherein substrates disposed downstream of at least the first two substrates comprise a ceramic material.

### Claim 10 (depends on 3)

The catalyst system of claim 3, wherein the ozone abatement catalyst comprises a manganese component.

### Claim 11 (depends on 2)

The catalyst system of claim 2, wherein the substrates are disposed within a canister in a spaced relationship

### Claim 12

A method for treating ozone in an air stream entering a passenger cabin of an aircraft, comprising placing a plurality of serially arranged, discrete substrates having an ozone abatement catalyst loaded thereon between a source of the air stream and the passenger cabin, the first two substrates comprising an iron-based alloy.

### Claim 13 (depends on 12)

The method of claim 12, wherein each substrate comprises a honeycomb and at least the first two substrates comprise an iron-chromium alloy.

### Claim 14 (depends on 13)

The method of claim 13, wherein the iron-chromium alloy comprises iron in the range of about 60 weight % to about 80.0 weight % chromium in the range of about 15 weight % to about 30 weight %, aluminum in the range of about 2 weight % to about 10 weight %, and lanthanum and cerium combined in an amount of less than about 1 weight %.

### Claim 15 (depends on 14)

The method of claim 14, wherein the iron-chromium alloy comprises iron in the range of about 70 weight % to about 80 weight %, chromium in the range of about 20 weight % to about 25 weight %, aluminum in the range of about 4 weight % to about 8 weight %, and lanthanum and cerium combined in an amount of less than about 0.5 weight %.

### Claim 16 (depends on 13)

The method of claim 13, wherein the iron-chromium alloy comprises iron in the range of about 76 weight % to about 80 weight %, chromium in the range of about 14 weight % to about 17%, aluminum in the range of about 5 weight % to about 6 weight %, carbon up to about 0.5 weight %, manganese up to about 1 weight %, silicon up to about 1 weight % and sulfur up to about 0.5 weight %.

### Claim 17 (depends on 13)

The method of claim 13, wherein the iron-based alloy has a density in the range of about 6.9 g/cm3 to about 7.2 g/cm3.

### Claim 18 (depends on 13)

The method of claim 13, wherein the ozone abatement catalyst comprises a manganese component.

### Claim 19 (depends on 13)

The method of claim 13, wherein the catalysts are disposed within a canister in a spaced relationship