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US4168946A
Expired / Lapsed
US
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Catalytic fuel combustion apparatus and method
Assignee: Comstock and Wescott Inc
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Filing: 1977-09-12
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Granted: 1979-09-25
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Expires: 1997-09-12
Abstract
Abstract A flameless catalytic combustion apparatus includes a combustion chamber with a hydrogenous fuel inlet and a mass of catalyst in the chamber between the inlet and an outlet. Preferably the catalyst mass comprises porous pellet bodies supporting varying high and low concentrations of platinum family metals dispersed therein. For spontaneous starting of combustion the fuel is one of the lower alcohols and the high catalyst concentration is at the fuel inlet. The fuel may be in a container pressurized by air, or a lower ether or lower hydrocarbon which is also a fuel. Preferably separate, valved conduits from the fuel container first supply either atomized fuel droplets or air and fuel vapor to the high catalyst concentration for spontaneous ignition of combustion and vaporized fuel for continued combustion throughout the catalyst mass. The catalytic combustion apparatus may include a heat exchanger for fluids such as air, water or personal care foams and creams, or may be used in heating and cooking apparatus.
Inventors
- 👤 Richard E. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:18
CPC Classifications
F; F23; F23C; F23C13/00; F24; F24H; F24H1/00; F24H1/0027; F24H1/0045; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
Catalytic fuel combustion apparatus with a combustion chamber including a fuel inlet, an outlet and a combustion path therebetween, and a fuel permeable catalyst mass in the chamber, characterized in that the chamber includes means dimensioned such that the heating power capable of being generated in the chamber divided by the volume of catalyst mass does not exceed approximately 4 cal/sec×cm 3 .
Claim 2
Dependent Claim
63 words
Catalytic fuel combustion apparatus with a combustion chamber including a fuel inlet, an outlet and a combustion path therebetween, and a fuel permeable catalyst mass in the chamber, characterized in that the chamber includes means dimensioned such that the heating power capable of being generated in the chamber divided by the volume of catalyst mass does not exceed approximately 4 cal/sec×cm 3 .
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1 characterized in that control means limits the fuel mass flow rate to less than approximately 2.5 mg/sec/cm 2 .
Claim 4
Dependent Claim
20 words
Apparatus according to claim 1 characterized in that the combustion chamber includes a heat exchanger thermally contacting the catalyst mass.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2 characterized in that the combustion chamber includes a heat exchanger thermally contacting the catalyst mass.
Claim 6
Independent Claim
40 words
The method of burning a fuel catalytically in a chamber containing a fuel permeable catalyst mass characterized in that fuel is flowed through the chamber at a rate not exceeding 2.5 mg/sec×cm 2 of cross section of the catalyst mass.
Claim 7
Independent Claim
40 words
The method of burning a fuel catalytically in a chamber containing a fuel permeable catalyst mass characterized in that fuel is flowed through the chamber at a rate not exceeding 2.5 mg/sec×cm 2 of cross section of the catalyst mass.
Claim 8
Dependent Claim
39 words
The method according to claim 5 characterized in that the fuel is flowed through a chamber generating heating power which divided by the volume of catalyst mass does not exceed approximately 4 cal/(sec. cm 3 ) of catalyst mass.
Claim 9
Dependent Claim
87 words
Catalytic fuel combustion apparatus comprising: a combustion chamber including a fuel inlet and an outlet and a combustion path therebetween, a fuel and air-permeable mass of catalyst in the chamber; a heat exchanger in contact with the catalyst mass, and means supplying fuel to the chamber and limiting the fuel mass flow rate through the chamber to not more than approximately twenty five ten thousandths of a gram per second of flow through a square centimeter of cross section of the catalyst mass in the combustion chamber.
Claim 10
Dependent Claim
87 words
Catalytic fuel combustion apparatus comprising: a combustion chamber including a fuel inlet and an outlet and a combustion path therebetween, a fuel and air-permeable mass of catalyst in the chamber; a heat exchanger in contact with the catalyst mass, and means supplying fuel to the chamber and limiting the fuel mass flow rate through the chamber to not more than approximately twenty five ten thousandths of a gram per second of flow through a square centimeter of cross section of the catalyst mass in the combustion chamber.
Claim 11
Dependent Claim
20 words
The method according to claim 6 wherein heat is withdrawn from the catalyst mass by a heat exchanger contact therewith.
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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |