# US 2024/0189770 A1 · Ambient temperature catalyst for trace contaminant control with improvements to carbon monoxide and hydrogen capture

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- Number: US 2024/0189770 A1
- Document ID: US20240189770A1
- Status: Published application
- Kind: A1
- Application number: 18/078,209
- Filed: 2022-12-09
- Published: 2024-06-13
- Earliest claimed: 2022-12-09
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Ping Yu
- Web page: https://patentgrep.com/patent/US20240189770A1

## CPC

- B01D 53/864: {Removing carbon monoxide or hydrocarbons}
- B01D 53/8671: {Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668}
- B01J 21/18: Carbon
- B01J 23/42: Platinum
- B01J 35/37: Crush or impact strength
- B01J 35/40: characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77)
- B01J 37/0036: {Grinding}
- B01J 37/009: {Preparation by separation, e.g. by filtration, decantation, screening}
- B01J 37/0207: {Pretreatment of the support}
- B01J 37/0236: {Drying, e.g. preparing a suspension, adding a soluble salt and drying}
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/088: {Decomposition of a metal salt}
- B64G 1/48: for treatment of the atmosphere (B64G1/50 takes precedence)
- C01B 32/318: characterised by the starting materials
- C01B 32/354: After-treatment
- C01B 32/384: Granulation
- B01D 2255/1021: Platinum
- B01D 2255/702: Carbon
- B01D 2255/92: Dimensions
- B01D 2255/9202: Linear dimensions
- B01D 2257/108: Hydrogen
- B01D 2257/502: Carbon monoxide
- B01D 2258/06: Polluted air
- B01D 2259/4575: in aeroplanes or space ships
- 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)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B64G: COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

The present disclosure provides for ambient temperature catalyst compositions for trace contaminant control (e.g., for environmental control assemblies for space systems) and related methods of fabrication and use. More particularly, the present disclosure provides for ambient temperature catalytic oxidation (ATCO) catalyst compositions for trace contaminant control with improvements to carbon monoxide and hydrogen capture, and related methods of fabrication and use.

## Claims

### Claim 1

A method for fabricating an ambient temperature catalytic oxidation catalyst composition comprising:
loading 4×8 US mesh granular activated carbon material into a rotating cylinder abrasimeter and subjecting the 4×8 US mesh granular activated carbon material to abrasion via the abrasimeter;
screening the abraded granular activated carbon material with a 6 US mesh screen;
washing the screened granular activated carbon material with water, and then drying the screened granular activated carbon material in a heating oven;
further screening the dried granular activated carbon material with a 6 US mesh screen to produce a 4×6 US mesh granular activated carbon material;
loading the 4×6 US mesh granular activated carbon material into a container, and adding a solution of chloroplatinic acid to the 4×6 US mesh granular activated carbon material;
loading the container into a rotary evaporator, and rotating the rotary evaporator to remove water from the container;
removing the 4×6 US mesh granular activated carbon material from the container and heating the 4×6 US mesh granular activated carbon material in an oven to produce a platinum on the 4×6 US mesh granular activated carbon material catalyst composition.

### Claim 2 (depends on 1)

The method of claim 1, wherein the granular activated carbon is coconut granular activated carbon.

### Claim 3 (depends on 1)

The method of claim 1, wherein the coconut granular activated carbon is fabricated from grades of coconut shell.

### Claim 4 (depends on 1)

The method of claim 1, wherein the platinum on the 4×6 US mesh granular activated carbon material catalyst composition is a 10% platinum on the 4×6 US mesh granular activated carbon material catalyst composition.

### Claim 5 (depends on 1)

The method of claim 1, wherein the 4×8 US mesh granular activated carbon material is subjected to abrasion at 90 cycles per minute for about four hours.

### Claim 6 (depends on 1)

The method of claim 1, wherein washing the screened granular activated carbon material comprises first washing the screened granular activated carbon material with tap water until a supernatant water is clear, and then washing the screened granular activated carbon material with deionized water.

### Claim 7 (depends on 1)

The method of claim 1, wherein after washing the screened granular activated carbon material with water, the water is drained from the screened granular activated carbon material prior to drying.

### Claim 8 (depends on 1)

The method of claim 1, wherein drying the screened granular activated carbon material in a heating oven comprises heating at 90° C. for about three hours, and then heating at 150° C. for about three hours.

### Claim 9 (depends on 1)

The method of claim 1, wherein prior to further screening the dried granular activated carbon material, the dried granular activated carbon material is cooled to ambient temperature.

### Claim 10 (depends on 1)

The method of claim 1, wherein adding the solution of chloroplatinic acid to the 4×6 US mesh granular activated carbon material comprises dripping the solution of chloroplatinic acid to the 4×6 US mesh granular activated carbon material.

### Claim 11 (depends on 1)

The method of claim 1, wherein loading the container into the rotary evaporator comprises positioning a portion of the container in a hot water bath.

### Claim 12 (depends on 1)

The method of claim 1, wherein rotating the rotary evaporator to remove water from the container comprises rotating the container for about five minutes while cooling water is turned on to condense water vapor.

### Claim 13 (depends on 1)

The method of claim 1, wherein rotating the rotary evaporator to remove water from the container comprises turning on and providing a vacuum to the rotary evaporator.

### Claim 14 (depends on 1)

The method of claim 1, wherein heating the 4×6 US mesh granular activated carbon material in the oven comprises heating in the oven at 250° C. for about four hours.

### Claim 15 (depends on 1)

The method of claim 1 further comprising utilizing the produced platinum on the 4×6 US mesh granular activated carbon material catalyst composition as an ambient temperature catalytic oxidation catalyst composition in a trace contaminant control assembly to remove at least one contaminant from an environment.

### Claim 16 (depends on 15)

The method of claim 15, wherein the at least one contaminant is hydrogen or carbon monoxide.

### Claim 17 (depends on 15)

The method of claim 15, wherein the trace contaminant control assembly is an environmental control assembly for a space system.

### Claim 18 (depends on 1)

An ambient temperature catalytic oxidation catalyst composition fabricated by the method of claim 1.