Combustion flame-plasma hybrid reactor systems, and chemical reactant sources

• US 8,591,821 B2
• Filed: 04/23/2009
• Issued: 11/26/2013
• Est. Priority Date: 04/23/2009
• Status: Active Grant

• Current Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Original Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Inventors: Kong, Peter C.
• Primary Examiner(s): Tai, Xiuyu
• Application Number:
  US12/428,604
• Publication Number:
  US 20100270142A1
• Time in Patent Office: 1,678 Days
• Field of Search: 204/164, 422/186, 422/186.21, 219/121.57, 219/121.52, 219/121.48, 219/121.36, 373 18- 22
• US Class Current: 422/186
• CPC Class Codes: B01J 19/088 giving rise to electric discharges for heating purposes H05B7/00; for the production of ozone C01B13/11, H01T19/00
• CPC Class Codes: B01J 2219/0813 employing four electrodes
• CPC Class Codes: B01J 2219/0822 The electrode being consumed
• CPC Class Codes: B01J 2219/083 cylindrical
• CPC Class Codes: B01J 2219/0839 Carbon
• CPC Class Codes: B01J 2219/0841 Metal
• CPC Class Codes: B01J 2219/0871 Heating or cooling of the reactor
• CPC Class Codes: B01J 2219/0879 Solid
• CPC Class Codes: B01J 2219/0881 Two or more materials
• CPC Class Codes: B01J 2219/0894 Processes carried out in the presence of a plasma
• CPC Class Codes: C01B 32/914 Carbides of single elements
• CPC Class Codes: C01B 32/921 Titanium carbide
• CPC Class Codes: C01B 32/97 Preparation from SiO or SiO2
• CPC Class Codes: C01B 6/21 Preparation of borohydrides of alkali metals, alkaline earth metals, magnesium or beryllium; Addition complexes thereof, e.g. LiBH4.2N2H4, NaB2H7
• CPC Class Codes: F23G 2204/201 Plasma

Abstract

Combustion flame-plasma hybrid reactor systems, chemical reactant sources, and related methods are disclosed. In one embodiment, a combustion flame-plasma hybrid reactor system comprising a reaction chamber, a combustion torch positioned to direct a flame into the reaction chamber, and one or more reactant feed assemblies configured to electrically energize at least one electrically conductive solid reactant structure to form a plasma and feed each electrically conductive solid reactant structure into the plasma to form at least one product is disclosed. In an additional embodiment, a chemical reactant source for a combustion flame-plasma hybrid reactor comprising an elongated electrically conductive reactant structure consisting essentially of at least one chemical reactant is disclosed. In further embodiments, methods of forming a chemical reactant source and methods of chemically converting at least one reactant into at least one product are disclosed.

Claims

1. A combustion flame-plasma hybrid reactor system comprising:

a reaction chamber;

a combustion torch positioned to direct a flame into the reaction chamber;

a plurality of electrically conductive solid reactant structures, a set of the plurality of electrically conductive solid reactant structures electrically coupled to a power supply and comprising a different reactant than another set of the plurality of electrically conductive solid reactant structures electrically coupled to another power supply, wherein the set of the plurality of electrically conductive solid reactant structures and the another set of the plurality of electrically conductive solid reactant structures are positioned on substantially the same longitudinal position relative to the reaction chamber; and

a plurality of reactant feed assemblies configured to electrically energize at least a portion of the plurality of electrically conductive solid reactant structures to form a plasma and to feed the plurality of electrically conductive solid reactant structures into the plasma to form at least one product.

2. The combustion flame-plasma hybrid reactor system of claim 1, wherein each of the plurality of electrically conductive solid reactant structures comprises graphite.

3. The combustion flame-plasma hybrid reactor system of claim 2, wherein each electrically conductive solid reactant structure of the set further comprises a sodium borate.

4. The combustion flame-plasma hybrid reactor system of claim 3, wherein the sodium borate comprises at least one of hydrated borax and hydrated metaborate.

5. The combustion flame-plasma hybrid reactor system of claim 4, wherein each electrically conductive solid reactant structure of the set further comprises sodium hydroxide.

6. The combustion flame-plasma hybrid reactor system of claim 2, wherein each electrically conductive solid reactant structure of the set further comprises at least one of silicon oxide, titanium oxide, and zirconium oxide.

7. The combustion flame-plasma hybrid reactor system of claim 2, wherein each of the plurality of electrically conductive solid reactant structures is comprised essentially of reactants.

8. The combustion flame-plasma hybrid reactor system of claim 7, wherein each of the plurality of electrically conductive solid reactant structures comprises a substantially cylindrical elongated body.

9. The combustion flame-plasma hybrid reactor system of claim 8, wherein the substantially cylindrical elongated body of each of the plurality of electrically conductive solid reactant structures extends from outside of the reaction chamber into the reaction chamber.

10. The combustion flame-plasma hybrid reactor system of claim 1, wherein the reaction chamber comprises a double-walled enclosure having an outer wall and an inner wall, the outer wall and the inner wall defining a coolant reservoir therebetween.

11. The combustion flame-plasma hybrid reactor system of claim 10, further comprising a thermally insulating lining substantially covering an inner surface of the inner wall of the double-walled enclosure of the reaction chamber.

12. The combustion flame-plasma hybrid reactor system of claim 11, wherein the thermally insulating lining comprises a substantially tubular ceramic insert.

13. The combustion flame-plasma hybrid reactor system of claim 1, wherein the combustion torch is fluidly coupled to a hydrocarbon fuel supply.

14. The combustion flame-plasma hybrid reactor system of claim 1, wherein at least one of the plurality of reactant feed assemblies comprises at least one of a step motor and a servo motor.

15. The combustion flame-plasma hybrid reactor system of claim 1, wherein each electrically conductive solid reactant structure of the set consists essentially of graphite and at least one other reactant, and wherein each electrically conductive solid reactant structure of the another set consists essentially of graphite.

16. The combustion flame-plasma hybrid reactor system of claim 1, further comprising insulating sleeves positioned directly adjacent each of the plurality of electrically conductive solid reactant structures.

17. The combustion flame-plasma hybrid reactor system of claim 1, wherein each electrically conductive solid reactant structure of the set comprises a sintered powder mixture of graphite and at least one other reactant.

18. The combustion flame-plasma hybrid reactor system of claim 17, wherein each electrically conductive solid reactant structure of the another set consists essentially of graphite.

19. The combustion flame-plasma hybrid reactor system of claim 17, wherein the at least one other reactant comprises a sodium borate, silicon oxide, titanium oxide, or zirconium oxide.

20. The combustion flame-plasma hybrid reactor system of claim 17, wherein the at least one other reactant comprises at least one of hydrated borax and hydrated metaborate.

21. The combustion flame-plasma hybrid reactor system of claim 17, wherein the at least one other reactant comprises a sodium borate and sodium hydroxide.

22. The combustion flame-plasma hybrid reactor system of claim 1, further comprising a cooling system configured to cool the reaction chamber without substantially cooling the plurality of electrically conductive solid reactant structures.

23. The combustion flame-plasma hybrid reactor system of claim 1, wherein the set of the plurality of electrically conductive solid reactant structures comprises at least two opposing electrically conductive solid reactant structures of the plurality of electrically conductive solid reactant structures.