US4273560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating combustion devices
Assignee: Siemens AG
•
Filing: 1979-08-20
•
Granted: 1981-06-16
•
Expires: 1999-08-20
Abstract
Abstract A method for the operation of combustion devices such as burners and internal-combustion engines, in which liquid hydrocarbon such as straight-run gasoline, heating oil and diesel fuel, are mixed with gasification primary air, and the resulting mixture is conducted into a reaction chamber containing metal bodies composed of an Al-Si eutectic with a primary phase of form about 15 to about 35 weight percent of silicon distributed therein, and in which from about 5 to about 30 weight percent of the aluminum is in the form of α-Al 2 O 3 , and in which from about 1 to about 10 weight percent of the silicon is in the form of β-SiC, where the liquid hydrocarbon is partially oxidized at elevated temperatures into a soot-free fuel gas mixture containing carbon monoxide, hydrogen and gaseous hydrocarbons, and the fuel gas mixture is mixed with secondary air and the fuel gas/secondary air mixture is conducted into the combustion device.
Inventors
- 👤 Hana Kostka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
F; F23; F23C; F23C13/00; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/40; F02; F02M; F02M27/00; F02M27/02; F23C6/00; F23C6/04; F02B; F02B3/00; F02B3/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A method for the operation of a combustion device, comprising: (a) mixing liquid hydrocarbons with air with an air number of from about 0.05 to about 0.3 resulting in the mixture with liquid hydrocarbons; (b) contacting said mixture with shaped metal bodies, consisting essentially of an aluminum alloy containing from about 15 to about 35% silicon by weight, and at elevated temperature, to result in the production, by partial oxidation, of a soot-free fuel gas mixture containing carbon monoxide, gaseous hydrocarbons and hydrogen wherein after the contacting from about 5 to about 30% by weight, of the aluminum in said shaped metal bodies is in the form of α-Al 2 O 3 and from about 1 to about 10% by weight of the silicon in said shaped metal bodies is in the form of β-SiC; (c) mixing said fuel gas with additional air to form a fuel gas/air mixture; and (d) conducting said fuel gas/air mixture to a device for the combustion thereof.
Claim 2
Independent Claim
163 words
A method for the operation of a combustion device, comprising: (a) mixing liquid hydrocarbons with air with an air number of from about 0.05 to about 0.3 resulting in the mixture with liquid hydrocarbons; (b) contacting said mixture with shaped metal bodies, consisting essentially of an aluminum alloy containing from about 15 to about 35% silicon by weight, and at elevated temperature, to result in the production, by partial oxidation, of a soot-free fuel gas mixture containing carbon monoxide, gaseous hydrocarbons and hydrogen wherein after the contacting from about 5 to about 30% by weight, of the aluminum in said shaped metal bodies is in the form of α-Al 2 O 3 and from about 1 to about 10% by weight of the silicon in said shaped metal bodies is in the form of β-SiC; (c) mixing said fuel gas with additional air to form a fuel gas/air mixture; and (d) conducting said fuel gas/air mixture to a device for the combustion thereof.
Claim 3
Dependent Claim
25 words
The method according to claim 1 wherein said shaped metal bodies consist essentially of an aluminum/silicon eutectic having distributed therein a primary phase of silicon.
Claim 4
Independent Claim
69 words
The method according to claims 1 or 2 wherein said contacting at elevated temperature of step (b) results in the in situ conversion of from about 5 to about 30% by weight, of the aluminum in said shaped metal bodies into α-Al 2 O 3 and the in situ conversion of from about 1 to about 10% by weight of the silicon in said shaped metal bodies into β-SiC.
Claim 5
Independent Claim
69 words
The method according to claims 1 or 2 wherein said shaped metal bodies, prior to the contacting of step (b), are subjected to a temperature of from about 600° C. to about 800° C. in an oxidizing atmosphere for at least about 10 hours to convert from about 5 to about 30% by weight of the aluminum present in said shaped metal bodies into α-Al 2 O 3 .
Claim 6
Independent Claim
69 words
The method according to claims 1 or 2 wherein said shaped metal bodies, prior to the contacting of step (b), are subjected to a temperature of from about 600° C. to about 800° C. for at least about 10 hours in an atmosphere containing gaseous or gasified hydrocarbons to convert from about 1 to about 10% by weight of the silicon present in said shaped metal bodies to β-SiC.
Claim 7
Independent Claim
108 words
The method according to claims 1 or 2 wherein said shaped metal bodies, prior to the contacting of step (b), are subjected to a temperature of from about 600° C. to about 800° C. for at least about 10 hours in a gaseous atmosphere containing hydrocarbons and air, in a C:O 2 ratio of from about 2 to 8, to effect conversion of from about 5 to about 30% by weight of the aluminum in said shaped metal bodies into α-Al 2 O 3 and to effect the conversion of from about 1 to about 10% by weight of the silicon in said shaped metal bodies into β-SiC.
Claim 8
Dependent Claim
31 words
The method according to claim 1 wherein the total of the amount of air utilized in steps (a) and (c) provides an air number of from about 1.0 to about 0.2.
Claim 9
Dependent Claim
17 words
The method according to claim 7 wherein said air number is from about 1.0 to about 1.07.
Claim 10
Dependent Claim
26 words
The method according to claim 1 wherein said liquid hydrocarbons comprise heating oils, and said device for combustion of said fuel gas/air mixture comprises a burner.
Claim 11
Dependent Claim
12 words
The method according to claim 9 wherein said heating oils contain sulphur.
Claim 12
Dependent Claim
39 words
The method according to claim 1 wherein said liquid hydrocarbons comprise a member selected from the group consisting of straight-run gasoline and Diesel oil, and said device for combustion of said fuel gas/air mixture comprises an internal combustion engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |