US4515092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhancement of solid fuel combustion by catalyst deposited on a substrate
Assignee: Mobil Oil AS
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Filing: 1984-01-11
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Granted: 1985-05-07
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Expires: 2004-01-11
Abstract
Abstract A combustion enhancing catalyst is deposited on a particulate refractory substrate such as sand. The solid fuel is contacted with the impregnated substrate and burned, for example, in a fluidized bed combustor. The substrate and catalyst remains in the combustor thereby obviating problems of catalyst loss and adverse effects of emitted metal particles.
Inventors
- 👤 Dennis E. Walsh
- 👤 Gary J. Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:01
CPC Classifications
F; F23; F23C; F23C13/00; F23C10/00; F23C10/002
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A method of burning solid fuel comprising: depositing a catalyst which enhances combustion by impregnating a particulate refractory substrate; contacting a solid fuel with said particulate refractory substrate; and burning said fuel.
Claim 2
Independent Claim
32 words
A method of burning solid fuel comprising: depositing a catalyst which enhances combustion by impregnating a particulate refractory substrate; contacting a solid fuel with said particulate refractory substrate; and burning said fuel.
Claim 3
Dependent Claim
26 words
The method recited in claim 1 further comprising: fluidizing said substrate and fuel in a fluidized bed combustor; and burning said fuel in said fluidized bed.
Claim 4
Dependent Claim
12 words
The method recited in claim 1 wherein said fuel is petroleum coke.
Claim 5
Dependent Claim
13 words
The method recited in claim 1 wherein said particulate refractory substrate is sand.
Claim 6
Dependent Claim
22 words
The method recited in claim 1 wherein said particulate refractory substrate has a low surface area, less than ˜5 m 2 /g.
Claim 7
Dependent Claim
18 words
The method recited in claim 1 wherein said catalyst is a noble metal or a transition metal oxide.
Claim 8
Dependent Claim
14 words
The method recited in claim 1 wherein said catalyst is an alkali metal oxide.
Claim 9
Dependent Claim
23 words
The method recited in claim 1 wherein said catalyst is selected from the group consisting of Pt, NiO, CoO, and Na 2 O.
Claim 10
Dependent Claim
28 words
The method recited in claim 1 wherein said solid fuel is contacted with a catalyst deposited on a particulate refractory substrate blend having components with different surface areas.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |