Rotary moving bed for CO2 separation and use of same

Patent metadata

Field	Value
Publication number	US-9539540-B2
Application number	US-201414325579-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Jul 8, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A rotary moving bed and process for separating a carbon dioxide from a gas stream is disclosed. The rotary moving bed can have a rotational assembly rotating on a vertical axis, and a plurality of sorbent cells positioned horizontally to the axis of rotation that fills a vertical space in the moving bed, where the sorbent cells adsorb the carbon dioxide by concentration swing adsorption and adsorptive displacement. The sorbent can be regenerated and the carbon dioxide recaptured by desorbing the carbon dioxide from the sorbent using concentration swing adsorption and desorptive displacement with steam. The gas flows in the system flow in a direction horizontal to the axis of rotation and in a direction opposite the rotational movement of the sorbent cells.

First claim

We claim:

1. A rotary moving bed comprising
a rotational assembly having a vertical axis of rotation and a plurality of fixed sorbent cells positioned horizontally relative to the axis of rotation and each cell or a combination of cells filling the vertical space within the rotational assembly such that gases cannot bypass the sorbent cells,
a non-moving exterior structure;
a regeneration stream inlet and outlet; and
a CO 2 feed stream inlet and outlet;

wherein a regeneration stream flows from the regeneration inlet to the regeneration outlet in the opposite direction of rotation for the rotational assembly, and a CO 2 feed stream flows from the CO 2 feed stream inlet to the CO 2 feed stream outlet in the opposite direction of rotation for the rotational assembly; and
wherein the CO 2 feed stream and the regeneration feed stream flow in a horizontal direction relative to the vertical axis of rotation.

2. The rotary moving bed of claim 1 , wherein the region between the regeneration inlet and outlets form a desorption zone and the region between the CO 2 feed stream inlet and outlet form an adsorption zone.

3. The rotary moving bed of claim 2 , wherein the adsorption zone comprises a plurality of sorbent cells in contact with CO 2 feed stream, and the sorbent cells in the desorption zone are moving in the opposite direction from the feed stream.

4. The rotary moving bed of claim 2 , wherein the desorption zone comprises a plurality of sorbent cells in contact with regeneration stream, and the sorbent cells in the desorption zone are moving in the opposite direction from the regeneration stream.

5. The rotary moving bed of claim 2 , wherein the region between the CO 2 feed stream outlet and the regeneration feed stream inlet and the region between the regeneration stream outlet and CO 2 feed stream inlet each are a transition zone wherein the sorbent cells are not in contact with either the regeneration stream or the CO 2 feed stream.

6. The rotary moving bed of claim 1 , wherein the adsorption and desorption do not occur by either temperature swing or pressure swing.

7. The rotary moving bed of claim 1 , wherein the regeneration stream is steam.

8. The rotary moving bed of claim 1 , wherein the adsorption zone comprise at least 30% of the total sorbent cells.

9. The rotary moving bed of claim 1 , wherein the adsorption zone comprise at least 35% of the total sorbent cells.

10. The rotary moving bed of claim 1 , wherein the desorption zone comprise at least 30% of the total sorbent cells.

11. The rotary moving bed of claim 1 , wherein the desorption zone comprise at least 35% of the total sorbent cells.

12. The rotary moving bed of claim 1 , wherein the sorbent cell comprises an alkalized substrate or an alkalized alumina.

13. A process for the separation and/or purification of CO 2 gas from a CO 2 feed stream, comprising
feeding a CO 2 feed stream into a CO 2 feed stream inlet of a rotary moving bed and collecting a CO 2 -depleted feed stream at a CO 2 feed stream outlet of the rotary moving bed,
feeding a regeneration stream into a regeneration stream inlet of the rotary moving bed and collecting a CO 2 -enriched stream at the regeneration stream outlet of the rotary moving bed,
wherein the rotary moving bed comprises
a rotational assembly having a vertical axis of rotation and a plurality of fixed sorbent cells positioned horizontally relative to the axis of rotation and each cell or a combination of cells filling the vertical space within the rotational assembly such that air cannot bypass the sorbent cells,
a non-moving exterior structure;
a desorption region between the regeneration inlet and outlets; and
an adsorption region between the CO 2 feed stream inlet and outlet;

wherein the regeneration stream flows from the regeneration inlet to the regeneration outlet in the opposite direction of rotation for the rotational assembly, and the CO 2 feed stream flows from the CO 2 feed stream inlet to the CO 2 feed stream outlet in the opposite direction of rotation for the rotational assembly; and
wherein the CO 2 feed stream and the regeneration feed stream flow in a horizontal direction relative to the vertical axis of rotation.

14. The process of claim 13 , wherein the adsorption zone comprises a plurality of sorbent cells in contact with CO 2 feed stream, and the sorbent cells in the desorption zone are moving in the opposite direction from the feed stream.

15. The process of claim 13 , wherein the desorption zone comprises a plurality of sorbent cells in contact with regeneration stream, and the sorbent cells in the desorption zone are moving in the opposite direction from the regeneration stream.

16. The process of claim 13 , wherein the region between the CO 2 feed stream outlet and the regeneration feed stream inlet and the region between the regeneration stream outlet and CO 2 feed stream inlet each are a transition zone wherein the sorbent cells are not in contact with either the regeneration stream or the CO 2 feed stream.

17. The process of claim 13 , wherein the adsorption and desorption do not occur by either temperature swing or pressure swing.

18. The process of claim 13 , wherein the regeneration stream is steam.

19. The process of claim 13 , wherein the adsorption zone comprise at least 30% of the total sorbent cells.

20. The process of claim 13 , wherein the adsorption zone comprise at least 35% of the total sorbent cells.

21. The process of claim 13 , wherein the desorption zone comprise at least 30% of the total sorbent cells.

22. The process of claim 13 , wherein the desorption zone comprise at least 35% of the total sorbent cells.

23. The process of claim 13 , wherein the sorbent cell comprises an alkalized substrate or an alkalized alumina.

Assignees

• Exxonmobil Res & Eng Co
• Tda Research Inc

Inventors

• Elliott Jeannine Elizabeth
• Copeland Robert James
• Mccall Patrick P

Classifications

• Y02C10/04

  Cross-Sectional Technologies · mapped topic

• B01D53/83 Primary

  with moving reactants · CPC title

• B01D2259/4009

  using hot gas · CPC title

• Y02C10/08

  Cross-Sectional Technologies · mapped topic

• B01D2258/0283

  Flue gases · CPC title