Carbon membrane for fluid separation and carbon membrane module for fluid separation

Patent metadata

Field	Value
Publication number	US-10994243-B2
Application number	US-201716071183-A
Country	US
Kind code	B2
Filing date	Jan 17, 2017
Priority date	Jan 22, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A carbon membrane for fluid separation, i.e., a fiber-form carbon membrane for fluid separation, has protrusions having a height difference of at least 1 μm formed on the fiber surface. In the carbon membrane for fluid separation, adhesion between membranes is inhibited and clogging tends not to occur when a gas mixture containing water vapor is separated. A carbon membrane module for fluid separation that includes the fibrous carbon membrane for fluid separation is also disclosed.

First claim

The invention claimed is:

1. A carbon membrane for fluid separation which is a fibrous carbon membrane for fluid separation, comprising a core layer having a co-continuous porous structure, and a skin layer formed around the core layer and substantially having no co-continuous porous structure wherein projections having a height difference of 1 μm or more are formed on a surface of fiber.

2. The carbon membrane for fluid separation according to claim 1 , wherein a core layer ratio in a projection cross-section of the projection is 50% or more and 98% or less.

3. The carbon membrane for fluid separation according to claim 1 , which separates mixed gases.

4. The carbon membrane for fluid separation according to claim 1 , wherein a height of the projection is ½ or less of a radius of an inscribed circle which inscribes in an outer edge of a cross-section of fiber.

5. The carbon membrane for fluid separation according to claim 1 , wherein the projection is a protrusion extending 100 μm or more in length in an axial direction of the fiber.

6. The carbon membrane for fluid separation according to claim 5 , wherein the protrusion extends along whole length of the carbon membrane for fluid separation.

7. The carbon membrane for fluid separation according to claim 5 , wherein a plurality of the protrusions are formed on a surface of the fiber.

8. The carbon membrane for fluid separation according to claim 7 , wherein the protrusions are formed radially in a cross-section of the fiber.

9. The carbon membrane for fluid separation according to claim 8 , wherein an average formation interval of the protrusions is ⅓ or more and 4 times or less of an average a width of the protrusions.

10. The carbon membrane for fluid separation according to claim 5 , wherein the average width of the protrusions is 1 μm or more and 100 μm or less.

11. A carbon membrane module for fluid separation, comprising the carbon membrane for fluid separation according to claim 1 .

12. A carbon membrane for fluid separation which is a fibrous carbon membrane for fluid separation and which separates mixed gases, wherein projections having a height difference of 1 μm or more are formed on a surface of fiber.

13. The carbon membrane for fluid separation according to claim 12 , which is a fibrous carbon membrane for fluid separation, comprising a core layer having a co-continuous porous structure, and a skin layer formed around the core layer and substantially having no co-continuous porous structure.

14. The carbon membrane for fluid separation according to claim 13 , wherein a core layer ratio in a projection cross-section of the projection is 50% or more and 98% or less.

15. The carbon membrane for fluid separation according to claim 12 , wherein a height of the projection is ½ or less of a radius of an inscribed circle which inscribes in an outer edge of a cross-section of fiber.

16. The carbon membrane for fluid separation according to claim 12 , wherein the projection is a protrusion extending 100 μm or more in length in an axial direction of the fiber.

17. The carbon membrane for fluid separation according to claim 16 , wherein the protrusion extends along whole length of the carbon membrane for fluid separation.

18. The carbon membrane for fluid separation according to claim 16 , wherein a plurality of the protrusions are formed on a surface of the fiber.

19. The carbon membrane for fluid separation according to claim 18 , wherein the protrusions are formed radially in a cross-section of the fiber.

20. The carbon membrane for fluid separation according to claim 19 , wherein an average formation interval of the protrusions is ⅓ or more and 4 times or less of an average a width of the protrusions.

21. The carbon membrane for fluid separation according to claim 16 , wherein the average width of the protrusions is 1 μm or more and 100 μm or less.

22. A carbon membrane module or fluid separation, comprising the carbon membrane for fluid separation according to claim 12 .

Assignees

• Toray Industries

Inventors

• KITABATA Masahiro
• Takeuchi Kosaku
• Mihara Takaaki
• Horiguchi Tomoyuki

Classifications

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• B01D69/087

  Details relating to the spinning process · CPC title

• B01D71/0213

  Silicon · CPC title

• B01D2325/0283

  Pore size · CPC title

• B01D71/021

  Carbon · CPC title