US5425632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for burning combustible mixtures
Assignee: Kawasaki Motors Ltd
•
Filing: 1993-07-06
•
Granted: 1995-06-20
•
Expires: 2013-07-06
Abstract
Abstract This invention is a process for catalytically burning a combustible mixture of a fuel and an oxygen-containing gas. In particular, the invention is a process for producing a combustion gas at a selected temperature, preferably between 1050° C. and 1700° C., by introducing all of the fuel necessary to attain that temperature to a combustion catalyst, partially combusting the combustible within the combustion catalyst, and homogeneously combusting the remainder of the fuel outside the catalyst. By controlling the temperature within the catalyst, deterioration of that catalyst is prevented.
Inventors
- 👤 Kazunori Tsurumi
- 👤 Nobuyasu Ezawa
- 👤 Ralph A. Dalla Betta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:44
CPC Classifications
F; F23; F23C; F23C13/00; F23C6/00; F23C6/04; F23C6/045; F23C2900/00; F23C2900/13002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A catalytic process for producing a combustion gas having a temperature between 1050° C. and 1700° C., the process comprising the steps of: a. partially combusting a combustible mixture comprised of fuel and oxygen-containing gas and having a theoretical adiabatic combustion gas temperature in a catalytic structure having at least one stage wherein a catalyst is situated so that a portion of the combustible mixture is inhibited in its contact with the catalyst by the presence of a diffusion layer on the catalyst so that only a portion of the fuel is combusted within the catalytic structure and the temperature of the partially combusted combustible mixture discharged from the catalytic structure is below the theoretical adiabatic combustion temperature, and b. combusting the remainder of the fuel in the combustible mixture outside of the catalytic structure to produce a combustion gas having a temperature within the desired range of 1050° C. and 1700° C.
Claim 2
Dependent Claim
153 words
A catalytic process for producing a combustion gas having a temperature between 1050° C. and 1700° C., the process comprising the steps of: a. partially combusting a combustible mixture comprised of fuel and oxygen-containing gas and having a theoretical adiabatic combustion gas temperature in a catalytic structure having at least one stage wherein a catalyst is situated so that a portion of the combustible mixture is inhibited in its contact with the catalyst by the presence of a diffusion layer on the catalyst so that only a portion of the fuel is combusted within the catalytic structure and the temperature of the partially combusted combustible mixture discharged from the catalytic structure is below the theoretical adiabatic combustion temperature, and b. combusting the remainder of the fuel in the combustible mixture outside of the catalytic structure to produce a combustion gas having a temperature within the desired range of 1050° C. and 1700° C.
Claim 3
Dependent Claim
25 words
The process of claim 1 where the first stage catalyst comprises palladium, the second stage catalyst comprises palladium, and the third stage catalyst comprises platinum.
Claim 4
Dependent Claim
38 words
The process of claim 2 where the temperature of the combustible mixture discharged from the first stage is between 500° C. and 650° C. and that discharged from the second stage is between 750° C. and 800° C.
Claim 5
Dependent Claim
14 words
The process of claim 1 where the catalyst support is a corrugated metal structure.
Claim 6
Dependent Claim
43 words
The process of claim 1 where the catalytic structure in which catalytic material is situated so that a portion of the combustible mixture is inhibited in its contact with the catalytic comprises a catalyst support having catalyst with a diffusion barrier situated therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |