Patent US4272336A successfully refreshed from Google Patents.
US4272336A
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Method and apparatus for forming nitric oxide from ammonia
Assignee: Massachusetts Institute of Technology
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Filing: 1979-07-27
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Granted: 1981-06-09
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Expires: 1999-07-27
Abstract
Abstract Nitric oxide is formed by the oxidation of ammonia. An ammonia containing gas is contacted with an oxidation catalyst deposited on a surface of a solid electrolyte while an oxygen containing gas is contacted with a second catalyst capable of dissociating oxygen gas to oxygen ion deposited upon a second surface of the solid electrolyte. Oxygen ion is transported through the solid electrolyte to react with ammonia to form nitric oxide under simultaneous production of electric energy.
Inventors
- 👤 Costas G. Vayenas
- 👤 David E. Ortman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:52
CPC Classifications
C; C25; C25B; C25B5/00; B; B01; B01J; B01J23/00; B01J23/38; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/265; C01B21/28; H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/1231; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10S; Y10S204/00; Y10S204/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
The process for oxidizing ammonia to form nitric oxide which comprises passing an ammonia-containing feed gas at a temperature between about 500° C. and about 1000° C. in contact with a first catalyst deposited on a first surface of a solid electrolyte and passing an oxygen-containing gas in contact with a second catalyst deposited on a second surface of said solid electrolyte, said first catalyst being capable of promoting the oxidation of ammonia to nitric oxide, said second catalyst being capable of dissociating oxygen gas to form oxygen ions, said solid electrolyte being capable of transporting said oxygen ions to contact said ammonia to form nitric oxide.
Claim 2
Dependent Claim
107 words
The process for oxidizing ammonia to form nitric oxide which comprises passing an ammonia-containing feed gas at a temperature between about 500° C. and about 1000° C. in contact with a first catalyst deposited on a first surface of a solid electrolyte and passing an oxygen-containing gas in contact with a second catalyst deposited on a second surface of said solid electrolyte, said first catalyst being capable of promoting the oxidation of ammonia to nitric oxide, said second catalyst being capable of dissociating oxygen gas to form oxygen ions, said solid electrolyte being capable of transporting said oxygen ions to contact said ammonia to form nitric oxide.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said solid electrolyte comprises yttria stabilized zirconia.
Claim 4
Dependent Claim
19 words
The process of any one of claims 1 or 2 wherein said first catalyst comprises a platinum-containing metal composition.
Claim 5
Dependent Claim
19 words
The process of any one of claims 1 or 2 wherein said second catalyst comprises a platinum-containing metal composition.
Claim 6
Dependent Claim
24 words
The process of any one of claims 1 or 2 wherein said first catalyst and said second catalyst each comprise a platinum-containing metal composition.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said solid electrolyte comprises calcia stabilized zirconia.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein said first catalyst comprises a platinum-containing metal composition.
Claim 9
Dependent Claim
14 words
The process of claim 6 wherein said second catalyst comprises a platinum-containing metal composition.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein said first catalyst and said second catalyst each comprise a platinum-containing metal composition.
Claim 11
Dependent Claim
28 words
The process of any one of claims 1, 2, 6, 7, 8 or 9 wherein the temperature of said ammonia is between about 600° C. and 850° C.
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |