Method and device for separating off carbon dioxide from a gas mixture

Patent metadata

Field	Value
Publication number	US-9597629-B2
Application number	US-201514806862-A
Country	US
Kind code	B2
Filing date	Jul 23, 2015
Priority date	Jul 25, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A method for separating off carbon dioxide from a gas mixture, in particular from breathing air, with a life-sustaining device, wherein in a first method step the gas mixture is fed to an adsorption and/or absorption unit under at least one first pressure, and in a second method step a gas mixture is conveyed out of the adsorption and/or absorption unit under at least one second pressure that is higher than the first pressure.

First claim

The invention claimed is:

1. A method for separating off carbon dioxide from a gas mixture, in particular from breathing air, with a life-sustaining device, wherein in a first method step the gas mixture is fed to an adsorption and/or absorption unit under at least one first pressure, and in a second method step a gas mixture is conveyed out of the adsorption and/or absorption unit under at least one second pressure that is higher than the first pressure.

2. The method according to claim 1 , wherein in the first method step the gas mixture is fed to the adsorption and/or absorption unit at least substantially at an ambient pressure.

3. The method according to claim 1 , wherein at least one pressure container is used as an adsorption and/or absorption unit.

4. The method according to claim 1 , wherein the adsorption and/or absorption unit is heated for the purpose of a pressure increase inside the adsorption and/or absorption unit.

5. The method according to claim 4 , wherein the adsorption and/or absorption unit is heated by means of hot vapor.

6. The method according to claim 1 , wherein at least one adsorption and/or absorption unit is heated electrically.

7. The method according to claim 1 , wherein a fluid is introduced into the adsorption and/or absorption unit for the purpose of a pressure increase inside the adsorption and/or absorption unit.

8. The method according to claim 5 , wherein hot vapor is introduced for the purpose of a pressure increase inside the adsorption and/or absorption unit.

9. The method according to claim 1 , wherein in the first method step the gas mixture is fed to the adsorption and/or absorption unit under at least one first temperature and in the second method step the gas mixture that is to be conveyed off is conveyed out of the adsorption and/or absorption unit under at least one second temperature that is higher than the first temperature.

10. The method according to claim 1 , wherein a gas is refed to the adsorption and/or absorption unit for the purpose of increasing a concentration in the adsorption and/or absorption unit.

11. The method according to claim 1 , wherein carbon dioxide is conveyed out of at least one adsorption and/or absorption unit without a subsequent densification and without using a compressor.

12. The method according to claim 1 , wherein in at least one adsorption and/or absorption unit at least one volume compensator is used, which is provided for ensuring a compaction of an adsorption and/or absorption material of the adsorption and/or absorption unit.

13. The method according to claim 1 , wherein the gas mixture is introduced into the adsorption and/or absorption unit in a first direction and is conveyed through an adsorption and/or absorption material arranged in the adsorption and/or absorption unit in a second direction that substantially differs from the first direction.

14. The method according to claim 1 , wherein heat energy is transferred from an adsorption and/or absorption unit to at least one further adsorption and/or absorption unit.

15. The method according to claim 1 , wherein pressure energy is transferred from an adsorption and/or absorption unit to at least one further adsorption and/or absorption unit.

16. The method according to claim 1 , wherein at least one solid-matter adsorber and/or solid-matter absorber is used.

17. The method according to claim 1 , wherein at least an amine is used.

18. The method according to claim 1 , wherein a recovery of air from at least one adsorption and/or absorption unit is carried out by means of at least one vacuum pump.

19. The method according to claim 1 , wherein pre-densified carbon dioxide after being conveyed out of at least one adsorption and/or absorption unit is dehydrated and then subsequently densified.

20. The method according to claim 1 , wherein carbon dioxide is dissolved in a liquid by means of at least one pressure water purger.

21. The method according to claim 1 , wherein a residual gas pressure in at least one adsorption and/or absorption unit is discharged into a liquid tank in at least one method step.

Assignees

• Airbus Ds Gmbh

Inventors

• Matthias Carsten
• Jehle Walter
• Kern Peter

Classifications

• B01D2259/40013

  Pressurization · CPC title

• B01D2259/4009

  using hot gas · CPC title

• B01D2259/4566

  for use in transportation means · CPC title

• B01D53/0462

  Temperature swing adsorption · CPC title

• B01D53/0431

  Beds with radial gas flow · CPC title