Method for producing carbon molecular sieve membranes in controlled atmospheres
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/22
B01D-067/00
B01D-069/08
B01D-071/02
C01B-031/02
출원번호
US-0930842
(2013-06-28)
등록번호
US-8709133
(2014-04-29)
발명자
/ 주소
Kiyono, Mayumi
Williams, Paul Jason
Koros, William John
출원인 / 주소
Georgia Tech Research Corporation
대리인 / 주소
McAndrews, Held & Malloy, Ltd.
인용정보
피인용 횟수 :
4인용 특허 :
6
초록▼
The invention concerns carbon molecular sieve membranes (“CMS membranes”), and more particularly the use of such membranes in gas separation. In particular, the present disclosure concerns an advantageous method for producing CMS membranes with desired selectivity and permeability properties. By con
The invention concerns carbon molecular sieve membranes (“CMS membranes”), and more particularly the use of such membranes in gas separation. In particular, the present disclosure concerns an advantageous method for producing CMS membranes with desired selectivity and permeability properties. By controlling and selecting the oxygen concentration in the pyrolysis atmosphere used to produce CMS membranes, membrane selectivity and permeability can be adjusted. Additionally, oxygen concentration can be used in conjunction with pyrolysis temperature to further produce tuned or optimized CMS membranes.
대표청구항▼
1. A process for making a carbon membrane having a predetermined gas separation performance, comprising: (a) providing a polymer precursor;(b) heating said precursor to a temperature at which pyrolysis byproducts are evolved; and(c) doping the carbon membrane with oxygen by contacting said precursor
1. A process for making a carbon membrane having a predetermined gas separation performance, comprising: (a) providing a polymer precursor;(b) heating said precursor to a temperature at which pyrolysis byproducts are evolved; and(c) doping the carbon membrane with oxygen by contacting said precursor with an oxygen-containing gas, the concentration of oxygen in said gas being selected to produce a carbon membrane having a predetermined gas separation performance. 2. The process of claim 1, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired permeability. 3. The process of claim 2, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired O2 permeability. 4. The process of claim 2, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired H2S permeability. 5. The process of claim 1, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired selectivity. 6. The process of claim 5, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired O2/N2 selectivity. 7. The process of claim 5, wherein the concentration of oxygen in said gas is selected to produce a carbon membrane having a desired H2S/CH4 selectivity. 8. The process of claim 1, wherein the concentration of oxygen in said gas is less than about 50 ppm. 9. The process of claim 1, wherein the concentration of oxygen in said gas is less than about 40 ppm. 10. The process of claim 1, wherein the concentration of oxygen in said gas is less than about 10 ppm. 11. The process of claim 1, wherein said heating temperature is also selected to produce a carbon membrane having a predetermined gas separation performance. 12. The process of claim 1, wherein said heating temperature is between about 450° C. and about 800° C. 13. The process of claim 12, wherein said heating temperature is between about 500° C. and about 550° C. 14. The process of claim 1, wherein the precursor is heated to said temperature for a soak time between about 1 hour and about 10 hours. 15. The process of claim 14, wherein the soak time is between about 4 hours and about 6 hours. 16. The process of claim 1, wherein the polymer precursor comprises a polymeric fiber or polymeric film. 17. The process of claim 16, wherein the polymer precursor comprises an asymmetric hollow polymer fiber. 18. The process of claim 1, wherein the polymer precursor comprises a polyimide. 19. A process for separating at least a first gas component and a second gas component, comprising: (a) providing a carbon membrane produced by the process of claim 1, and(b) flowing a mixture of at least a first gas component and a second gas component through said membrane to produce (i) a retentate stream having a reduced concentration of a first gas component, and(ii) a permeate stream having an increased concentration of a first gas component. 20. A process for removing O2 from air comprising: (a) providing a carbon membrane produced by the process of claim 1, and(b) contacting air with said membrane to produce (i) a retentate stream having a reduced concentration of O2, and(ii) a permeate stream having an increased concentration of O2. 21. A process for separating acid gas components from a natural gas stream comprising (a) providing a carbon membrane produced by the process of claim 1, and(b) contacting a natural gas stream with said membrane to produce (i) a retentate stream having a reduced concentration of acid gas components, and(ii) a permeate stream having an increased concentration of acid gas components. 22. The process of claim 21, wherein the acid gas components comprise CO2, H2S, or mixtures thereof. 23. The carbon membrane produced by the process of claim 1. 24. A carbon molecular sieve module comprising a sealable enclosure, said enclosure having: a plurality of carbon membranes contained therein, at least one of said carbon membranes produced according to the process of claim 1;an inlet for introducing a feed stream comprising at least a first gas component and a second gas component;a first outlet for permitting egress of a permeate gas stream; and,a second outlet for permitting egress of a retentate gas stream.
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이 특허에 인용된 특허 (6)
Lee Kew-Ho (Cincinnati OH) Khang Soon-Jai (Cincinnati OH), High temperature membrane.
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