Carbon oxide reduction with intermetallic and carbide catalysts
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-031/02
B01J-023/889
B01J-023/72
B01J-023/745
B01J-023/755
B01J-023/89
C01B-031/04
B01J-027/22
B01J-027/224
B01J-021/18
B82Y-030/00
출원번호
US-0775953
(2014-03-12)
등록번호
US-9783421
(2017-10-10)
국제출원번호
PCT/US2014/025087
(2014-03-12)
국제공개번호
WO2014/151144
(2014-09-25)
발명자
/ 주소
Noyes, Dallas B.
Ring, Terry A.
출원인 / 주소
Seerstone LLC
대리인 / 주소
TraskBritt, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
204
초록▼
A method of reducing a gaseous carbon oxide includes reacting a carbon oxide with a gaseous reducing agent in the presence of an intermetallic or carbide catalyst. The reaction proceeds under conditions adapted to produce solid carbon of various allotropes and morphologies, the selective formation o
A method of reducing a gaseous carbon oxide includes reacting a carbon oxide with a gaseous reducing agent in the presence of an intermetallic or carbide catalyst. The reaction proceeds under conditions adapted to produce solid carbon of various allotropes and morphologies, the selective formation of which can be controlled by means of controlling reaction gas composition and reaction conditions including temperature and pressure. A method for utilizing an intermetallic or carbide catalyst in a reactor includes placing the catalyst in a suitable reactor and flowing reaction gases comprising a carbon oxide with at least one gaseous reducing agent through the reactor where, in the presence of the catalyst, at least a portion of the carbon in the carbon oxide is converted to solid carbon and a tail gas mixture containing water vapor.
대표청구항▼
1. A method of reducing a carbon oxide to a lower oxidation state, the method comprising: reacting a carbon oxide with a gaseous reducing agent in the presence of a catalyst to produce water and a solid carbon product;wherein the catalyst comprises an intermetallic compound comprising Fe3Pt. 2. A me
1. A method of reducing a carbon oxide to a lower oxidation state, the method comprising: reacting a carbon oxide with a gaseous reducing agent in the presence of a catalyst to produce water and a solid carbon product;wherein the catalyst comprises an intermetallic compound comprising Fe3Pt. 2. A method of reducing a carbon oxide to a lower oxidation state, the method comprising: reacting a carbon oxide with a gaseous reducing agent in the presence of a catalyst to produce water and a solid carbon product;wherein the catalyst comprises a metal carbide. 3. The method of claim 2, wherein the catalyst comprises cementite (Fe3C). 4. A method of reducing carbon dioxide to a lower oxidation state, the method comprising: reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst to produce water and a solid carbon product. 5. The method of claim 4, wherein the gaseous reducing agent comprises at least one gas selected from the group consisting of hydrogen, methane, ethane, propane, butane, hexane, and heptane. 6. The method of claim 4, wherein reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst comprises reacting the carbon dioxide with the gaseous reducing agent a temperature of between about 500° C. and 1,000° C. 7. The method of claim 4, wherein the SiC catalyst is particulate and has a mean particle size between about 0.1 μm and about 200 μm. 8. The method of claim 4, further comprising pretreating the SiC catalyst to form grains, the pretreating comprising at least one of carburizing, recrystallizing, annealing, quenching, oxidizing, reducing, etching, and performing sputtering on a surface of the SiC catalyst. 9. The method of claim 4, wherein reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst comprises heating the SiC catalyst to a predetermined temperature, maintaining the predetermined temperature for a predetermined time, and controlling a cooling rate of the catalyst. 10. The method of claim 9, wherein heating the SiC catalyst to a predetermined temperature comprises heating the catalyst to a temperature between about 500° C. and about 1,000° C. 11. The method of claim 4, further comprising controlling a grain boundary of the SiC catalyst to control at least one of a size and a morphology of the solid carbon product. 12. The method of claim 4, wherein reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst comprises reacting the carbon dioxide with a gaseous reducing agent at a temperature of about 500° C. or higher. 13. The method of claim 4, wherein reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst comprises reacting the carbon dioxide with the gaseous reducing agent in the presence of a catalyst promoter. 14. The method of claim 13, wherein reacting the carbon dioxide with the gaseous reducing agent in the presence of a catalyst promoter comprises reacting the carbon oxide carbon dioxide with the gaseous reducing agent in the presence of a catalyst promoter selected from the group consisting of thiophene, hydrogen sulfide, a heterocyclic sulfide, an inorganic sulfide, volatile lead, a bismuth compound, ammonia, nitrogen, excess hydrogen, and combinations thereof. 15. The method of claim 4, wherein reacting carbon dioxide with a gaseous reducing agent in the presence of a silicon carbide (SiC) catalyst comprises reacting carbon dioxide with the gaseous reducing agent by introducing pulsed laser light. 16. The method of claim 4, further comprising reducing oxides on a surface of the SiC catalyst with at least one of hydrogen gas and methane. 17. The method of claim 4, wherein the SiC catalyst is free of a solid support.
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