Zeolite membrane separation and recovery system for CO2

Patent metadata

Field	Value
Publication number	US-9333457-B2
Application number	US-201214116347-A
Country	US
Kind code	B2
Filing date	May 9, 2012
Priority date	May 9, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

To provide a CO 2 membrane separation and recovery system that is excellent in CO 2 permeability and CO 2 separation selectivity on recovery of CO 2 in a hydrogen production process and the like. The CO 2 membrane separation and recovery system of the present invention comprises a dehydration treatment module ( 2 ) preliminary to a CO 2 membrane separation module ( 1 ), the CO 2 membrane separation module ( 1 ) comprises a hydrophilic zeolite membrane ( 3 ) that exhibits CO 2 selective permeability and is formed on a porous substrate, and the hydrophilic zeolite membrane ( 3 ) is subjected to a dehydration treatment by a heat treatment at from 100 to 800° C.

First claim

The invention claimed is:

1. A CO 2 membrane separation and recovery system comprising a dehydration means preliminary to a CO 2 membrane separation means, the CO 2 membrane separation means comprising a hydrophilic zeolite membrane formed on a porous substrate, the hydrophilic zeolite membrane formed on the porous substrate being subjected to a dehydration treatment by a heat treatment at from 100 to 800° C., and the hydrophilic zeolite membrane being maintained in a dehydrated condition while in use for CO 2 separation and recovery.

2. The CO 2 membrane separation and recovery system according to claim 1 , wherein the hydrophilic zeolite is an FAU-type or a CHA-type.

3. The CO 2 membrane separation and recovery system according to claim 1 , which further comprises, subsequent to the dehydration means, a noble metal membrane or a porous molecular sieve membrane constituted by silica or zeolite having an effective pore diameter of from 0.28 to 0.33 nm that allows hydrogen to permeate selectively.

4. A membrane separation and recovery method for CO 2 using the CO 2 membrane separation and recovery system according to claim 1 , comprising a dehydration step preliminary to a CO 2 membrane separation step, the CO 2 membrane separation step being maintained to a dry condition having a dew point of a feed gas of from −80 to 0° C.

5. The method according to claim 4 , wherein CO 2 is separated and recovered in a process of producing hydrogen from a hydrocarbon or an alcohol.

6. The method according to claim 5 , which comprises a step of performing hydrogen purification.

7. The method according to claim 4 , wherein CO 2 is separated and recovered from a mixed gas containing CO 2 .

8. The method according to claim 7 , wherein the mixed gas is a natural gas or a biogas that contains methane gas as a major component and steam.

9. A membrane separation and recovery method for CO 2 using the CO 2 membrane separation and recovery system according to claim 2 , comprising a dehydration step preliminary to a CO 2 membrane separation step, the CO 2 membrane separation step being maintained to a dry condition having a dew point of a feed gas of from −80 to 0° C.

10. A membrane separation and recovery method for CO 2 using the CO 2 membrane separation and recovery system according to claim 3 , comprising a dehydration step preliminary to a CO 2 membrane separation step, the CO 2 membrane separation step being maintained to a dry condition having a dew point of a feed gas of from −80 to 0° C.

11. The method according to claim 9 , wherein CO 2 is separated and recovered in a process of producing hydrogen from a hydrocarbon or an alcohol.

12. The method according to claim 10 , wherein CO 2 is separated and recovered in a process of producing hydrogen from a hydrocarbon or an alcohol.

13. The method according to claim 11 , which comprises a step of performing hydrogen purification.

14. The method according to claim 12 , which comprises a step of performing hydrogen purification.

15. The method according to claim 9 , wherein CO 2 is separated and recovered from a mixed gas containing CO 2 .

16. The method according to claim 10 , wherein CO 2 is separated and recovered from a mixed gas containing CO 2 .

17. The method according to claim 15 , wherein the mixed gas is a natural gas or a biogas that contains methane gas as a major component and steam.

18. The method according to claim 16 , wherein the mixed gas is a natural gas or a biogas that contains methane gas as a major component and steam.

Assignees

• Sawamura Ken-Ichi
• Aizawa Masanobu
• Shimizu Takehiro
• Hitachi Shipbuilding Eng Co
• Jx Nippon Oil & Energy Corp

Inventors

• Sawamura Ken-Ichi
• Aizawa Masanobu
• Shimizu Takehiro

Classifications

• B01D53/22 Primary

  by diffusion (manufacturing semi-permeable membranes B01D67/00; form, structure or properties of semi-permeable membranes B01D69/00; material for semi-permeable membranes B01D71/00) · CPC title

• C01B2203/0475

  the impurity being carbon dioxide · CPC title

• B01D2256/22

  Carbon dioxide · CPC title

• B01D2253/108

  Zeolites · CPC title

• B01D53/62

  Carbon oxides · CPC title