# US 2023/0264178 A1 · Propane gas removal material

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- Number: US 2023/0264178 A1
- Document ID: US20230264178A1
- Status: Published application
- Kind: A1
- Application number: 17/678,297
- Filed: 2022-02-23
- Published: 2023-08-24
- Earliest claimed: 2022-02-23
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Mordechai KORNBLUTH; Soo KIM; Thomas WEIL; Sebastian MARTENS; Fabian SCHMID; Charles TUFFILE
- Web page: https://patentgrep.com/patent/US20230264178A1

## CPC

- B01D 53/864: {Removing carbon monoxide or hydrocarbons}
- B01D 53/72: Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
- B01D 2251/30: Alkali metal compounds
- B01D 2251/304: of sodium
- B01D 2251/306: of potassium
- B01D 2255/102: Platinum group metals
- B01D 2255/1026: Ruthenium
- B01D 2255/204: Alkaline earth metals
- B01D 2255/20746: Cobalt
- B01D 2257/7022: Aliphatic hydrocarbons
- B01J 35/50: characterised by their shape or configuration
- F25B 49/005: {of safety devices (F25B49/02 and F25B49/04 take precedence)}
- F25B 2500/22: Preventing, detecting or repairing leaks of refrigeration fluids
- 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
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

A propane gas-utilizing system includes a housing having propane gas and a propane leakage prevention material having a catalyst, scavenger, and/or oxidizer of the propane gas arranged in the housing and including at least one of (a) an oxide material having at least one composition of formula (I): Ru1-xMxO2 (I), where 0<x≤0.1 and M is Ag, K, Pt, Rh, or Ir, or (b) an oxide material having at least one composition of formula (II): Co3-xMxO4 (II), where 0<x≤0.3, and M is Pd, Cu, or Sr, or (c) an oxide material having at least one composition of formula (III): MM′xOy (III), where x is a stoichiometric ratio of M′ to M, 0≤x≤1.5, y is a stoichiometric ratio of O to M, 1≤y≤3, M is an alkali metal, and M′ (if x>0) is Y, Ce, Nb, Ta, La, Nd, Mn, Ag, Au, or Cr.

## Claims

### Claim 1

A propane gas-utilizing system comprising:
a housing including propane gas;
a propane leakage prevention material comprising a catalyst, scavenger, and/or oxidizer of the propane gas arranged in the housing and including at least one of
(a) an oxide material having at least one composition of formula (I):
Ru1-xMxO2 (I),
where:
0<x≤0.1, and
M is Ag, K, Pt, Rh, or Ir,
or
(b) an oxide material having at least one composition of formula (II):
Co3-xMxO4 (II),
where:
0<x≤0.3, and
M is Pd, Cu, or Sr,
or
(c) an oxide material having at least one composition of formula (III):
MM′xOy (III),
where:
x is a stoichiometric ratio of M′ to M, 0≤x≤1.5,
y is a stoichiometric ratio of O to M, 1≤y≤3,
M is an alkali metal, and
M′ (if x>0) is Y, Ce, Nb, Ta, La, Nd, Mn, Ag, Au, or Cr.

### Claim 2 (depends on 1)

The system of claim 1, wherein the material is configured as a coating on at least one surface of the housing.

### Claim 3 (depends on 1)

The system of claim 1, wherein the material is a scavenger including at least one oxide of formula (II) or (III).

### Claim 4 (depends on 1)

The system of claim 1, wherein the material forms a multi-layer coating, each layer having the same composition.

### Claim 5 (depends on 1)

The system of claim 1, wherein the material includes an alkali oxide.

### Claim 6 (depends on 1)

The system of claim 1, wherein M in the formula (I) or (III) is K.

### Claim 7 (depends on 1)

The system of claim 1, wherein the material is structured as a replaceable component of the propane gas-utilizing system.

### Claim 8 (depends on 1)

The system of claim 1, wherein the material includes at least one compound of the formula (III), where M′ is a transition metal and M is Na, K, Rb, or Cs.

### Claim 9

A propane gas catalyst comprising:
at least one of
(a) an oxide material having at least one composition of formula (I):
Ru1-xMxO2 (I),
where:
0<x≤0.1, and
M is Ag, K, Pt, Rh, or Ir,
or
(b) an oxide material having at least one composition of formula (II):
Co3-xMxO4 (II),
where:
0<x≤0.3, and
M is Pd, Cu, or Sr,
or
(c) an oxide material having at least one composition of formula (III):
MM′xOy (III),
where:
x is a stoichiometric ratio of M′ to M, 0≤x≤1.5,
y is a stoichiometric ratio of O to M, 1≤y≤3,
M is Na, K, Rb, or Cs, and
M′ (if x>0) is Y, Ce, Nb, Ta, La, Nd, Mn, Ag, Au, or Cr,
the catalyst being configured to increase a rate of propane gas oxidation without being consumed in the reaction.

### Claim 10 (depends on 9)

The catalyst of claim 9, wherein the catalyst is a heat pump system propane gas catalyst.

### Claim 11 (depends on 9)

The catalyst of claim 9, wherein the catalyst forms a nanoparticle layer.

### Claim 12 (depends on 9)

The catalyst of claim 9, wherein the catalyst includes only oxides of the formula (I).

### Claim 13 (depends on 9)

The catalyst of claim 9, wherein the catalyst is arranged as a multi-layer coating.

### Claim 14 (depends on 13)

The catalyst of claim 13, wherein each layer of the multi-layer coating includes one or more compounds of the same formula (I), (II), or (III).

### Claim 15

A propane gas scavenger comprising:
at least one of
(a) an oxide material having at least one composition of formula (I):
Ru1-xMxO2 (I),
where:
0<x≤0.1, and
M is Ag, K, Pt, Rh, or Ir,
or
(b) an oxide material having at least one composition of formula (II):
Co3-xMxO4 (II),
where:
0<x≤0.3, and
M is Pd, Cu, or Sr,
or
(c) an oxide material having at least one composition of formula (III):
MaM′xOy (III),
where:
x is a stoichiometric ratio of M′ to M, 0≤x≤1.5,
y is a stoichiometric ratio of O to M, 1≤y≤3,
M is an alkali metal, and
M′ (if x>0) is Y, Ce, Nb, Ta, La, Nd, Mn, Ag, Au, or Cr,
the scavenger being configured to selectively react with the propane gas to convert the propane gas into a composition with a lower density than the propane gas.

### Claim 16 (depends on 15)

The scavenger of claim 15, wherein the scavenger is a heat pump system propane gas scavenger.

### Claim 17 (depends on 16)

The scavenger of claim 16, wherein the scavenger is a replaceable component of the heat pump system.

### Claim 18 (depends on 15)

The scavenger of claim 15, wherein the scavenger forms a nanoparticle layer.

### Claim 19 (depends on 15)

The scavenger of claim 15, wherein the scavenger includes at least one compound of the formula (III), where M′ is a transition metal.

### Claim 20 (depends on 15)

The scavenger of claim 15, wherein the scavenger includes a mixture of compounds of the formulas (II) and (III).