EP0351082A2
Expired / Lapsed
EP
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Catalytic combustion
Assignee: Imperial Chemical Industries Ltd
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Filing: 1989-06-23
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Granted: —
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Expires: 2009-06-23
Abstract
Abstract A catalytic combustion system, e.g. in a gas turbine, has a combustion catalyst supported by a honeycomb structure (20) and an integral, or separate, catalyst-free honeycomb section (22) upstream of the combustion catalyst acting as, or supporting, a flame trap.
Inventors
- 👤 Peter John Davidson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:03
CPC Classifications
F; F23; F23C; F23C13/00; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/82; F23R; F23R3/00; F23R3/40; F05; F05B; F05B2230/00; F05B2230/60; F05B2230/604; F05B2230/606
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
A catalytic combustion system wherein combustion of a fuel/air mixture is effected by passage of the fuel/air mixture over a combustion catalyst supported on a monolithic honeycomb structure, characterised by the provision of a flame trap upstream of said combustion catalyst, said flame trap comprising, or being supported on its downstream side by, a combustion catalyst-free honeycomb section.
Claim 2
Dependent Claim
58 words
A catalytic combustion system wherein combustion of a fuel/air mixture is effected by passage of the fuel/air mixture over a combustion catalyst supported on a monolithic honeycomb structure, characterised by the provision of a flame trap upstream of said combustion catalyst, said flame trap comprising, or being supported on its downstream side by, a combustion catalyst-free honeycomb section.
Claim 3
Dependent Claim
54 words
A catalytic combustion system according to claim 1 wherein the honeycomb support structure has a coating of the combustion catalyst, and the catalyst-free honeycomb section is an uncoated portion of said honeycomb support structure and has a length of not more than 100 times the hydraulic diameter of the passages extending through the honeycomb.
Claim 4
Dependent Claim
23 words
A catalytic combustion system according to claim 1 wherein the catalyst-free honeycomb section is separate from the honeycomb structure supporting the combustion catalyst.
Claim 5
Dependent Claim
36 words
A catalytic combustion system according to any one of claims 1 to 3 wherein the catalyst-free honeycomb section has a length of at least 5 times the hydraulic diameter of the passages extending through the honeycomb.
Claim 6
Dependent Claim
32 words
A catalytic combustion system according to any one of claims 1 to 4 wherein the passages extending through the honeycomb section, or sections, have a hydraulic diameter of less than 5 mm.
Claim 7
Dependent Claim
31 words
A catalytic combustion system according to any one of claims 1 to 5 wherein the cross section of the honeycomb section, or sections, has an open area of at least 30%.
Claim 8
Dependent Claim
31 words
A catalytic combustion system according to any one of claims 1 to 6 wherein the honeycomb section, or sections, have 10 to 100 passages per cm² of the honeycomb cross section.
Claim 9
Dependent Claim
54 words
A catalytic combustion system according to any one of claims 1 to 7 wherein the catalyst-free honeycomb section itself forms the flame trap and the hydraulic diameter of the passages of the catalyst-free honeycomb section is within the range 0.5 to 2.5 mm and the length of the passages is less than 100 mm.
Claim 10
Dependent Claim
17 words
A gas turbine incorporating a catalytic combustion system according to any one of claims 1 to 8.
Claim 11
Dependent Claim
18 words
A domestic water boiler incorporating a catalytic combustion system according to any one of claims 1 to 8.
References Cited (Backward Citations)
No citation records indexed.
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