US4585631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the conversion of nitrogen oxides contained in gaseous products of combustion
Assignee: EOn Ruhrgas AG
•
Filing: 1985-01-25
•
Granted: 1986-04-29
•
Expires: 2005-01-25
Abstract
Abstract A reducing agent such as preferably ammonia (NH 3 ) is blended in a reaction chamber with gaseous products of combustion for the conversion of the nitrogen oxides (NO x ) contained in the products of combustion into innoxious flue gas components. To accelerate the rate of reaction, the reactivity of the reducing agent is increased by the input of energy preferably by radiation of coherent light emitted by a laser. The necessary rate of conversion can thereby be achieved without the use of catalysts associated with undesired side effects.
Inventors
- 👤 Roland Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/125; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; B01J19/121
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A method for the treatment of combustion products containing at least one nitrogen oxide comprising: providing said flue gas combustion products; providing a reducing agent selected from the group consisting of ammonia (NH 3 ), synthesis gas (CO+H 2 ), methane (CH 4 ), higher hydrocarbons and a mixture of said reducing agents; irradiating said reducing agent with radiant energy emitted by at least one laser to increase the ractivity or the reducing agent; and thereafter blending only said products of combustion and said irradiated reducing agent in a reaction chamber to convert said at least one nitrogen oxide into innoxious flue gas constituents.
Claim 2
Independent Claim
104 words
A method for the treatment of combustion products containing at least one nitrogen oxide comprising: providing said flue gas combustion products; providing a reducing agent selected from the group consisting of ammonia (NH 3 ), synthesis gas (CO+H 2 ), methane (CH 4 ), higher hydrocarbons and a mixture of said reducing agents; irradiating said reducing agent with radiant energy emitted by at least one laser to increase the ractivity or the reducing agent; and thereafter blending only said products of combustion and said irradiated reducing agent in a reaction chamber to convert said at least one nitrogen oxide into innoxious flue gas constituents.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein said reducing agent is in solution in a solvent.
Claim 4
Dependent Claim
11 words
A method according to claim 2 wherein said solvent is water.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said reducing agent is in the liquid state.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein said reducing agent is in the gaseous state.
Claim 7
Dependent Claim
47 words
A method according to claim 1 wherein said reducing agent is exposed to laser radiation before said reducing agent is blended with the products of combustion to be treated; said laser radiation irradiating substantially all of the molecules of said reducing agent before reaching said reaction chamber.
Claim 8
Dependent Claim
20 words
A method according to claim 1 wherein said reducing agent is irradiated immediately prior to blending in said reaction chamber.
Claim 9
Dependent Claim
42 words
A method according to claim 1 wherein said reducing agent flows through pipework through which laser radiation may pass and substantially the entire cross section of said pipework is exposed to a radiation of coherent light emitted by at least one laser.
Claim 10
Dependent Claim
17 words
A method according to claim 1 wherein said laser radiation is generated by a pulsed solid laser.
Claim 11
Dependent Claim
17 words
A method according to claim 1 wherein said laser radiation is generated by a continuous gas laser.
References Cited (Backward Citations)
JPS5198670A
Cited
JPS5637029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |