Rapid cycle adsorbent bed

Patent metadata

Field	Value
Publication number	US-11376545-B2
Application number	US-202016822518-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Apr 30, 2019
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

The disclosure provides for an adsorbent bed assembly for separation of gaseous mixtures. The assembly includes a body defining an interior cavity. The body includes an outer shell, and first and second ends engaged with the outer shell that include inputs/outputs. A central support structure is positioned within the interior cavity and is engaged with the body or forms a portion thereof. Anti-telescoping devices are positioned about the central support structure, at least one of which is affixed to the central support structure. Each anti-telescoping device includes a plurality of spokes extending within the interior cavity from or proximate the central support structure towards the outer shell.

First claim

What is claimed is:

1. An adsorbent bed assembly for separation of gaseous mixtures, the assembly comprising:
a body, the body at least partially defining an interior cavity, wherein the body includes:
an outer shell;
a first end engaged with the outer shell, including a first input/output in fluid communication with the interior cavity;
a second end engaged with the outer shell, including a second input/output in fluid communication with the interior cavity; and
a central support structure positioned within the interior cavity and coupled with the first and second ends and extending therebetween;

a plurality of anti-telescoping devices positioned about the central support structure, wherein at least one of the anti-telescoping devices is affixed to the central support structure, and wherein each anti-telescoping device includes a plurality of spokes extending within the interior cavity from or proximate the central support structure towards the outer shell.

2. The adsorbent bed assembly of claim 1 , further comprising a pad positioned on a surface of each spoke, the pad including an elastomeric material.

3. The adsorbent bed assembly of any of claim 1 , wherein the anti-telescoping devices maintain pre-loading of modules of adsorbent material positioned within the internal cavity.

4. The adsorbent bed assembly of claim 1 , wherein at least one of the anti-telescoping devices is free-floating relative to the central support structure.

5. The adsorbent bed assembly of claim 1 , wherein the anti-telescoping devices are affixable to the central support structure at continuously variable positions along a longitudinal length of the central support structure.

6. The adsorbent bed assembly of claim 1 , wherein clamping loads are provided by the at least one anti-telescoping device that is affixed to the central support structure.

7. The adsorbent bed assembly of claim 1 , wherein each anti-telescoping device includes an inner ring positioned about the central support structure, and wherein the spokes are radial spokes that extend from the inner ring towards the outer shell.

8. The adsorbent bed assembly of claim 1 , wherein the at least one anti-telescoping device is affixed to the central support structure via at least one setscrew.

9. The adsorbent bed assembly of claim 8 , further comprising at least one friction pad positioned on the central support structure, between the central support structure and the anti-telescoping devices, wherein the at least one setscrew engages within the at least one friction pad.

10. The adsorbent bed assembly of claim 1 , wherein the central support structure comprises:
a central post coupled with the first end and the second end, wherein the central post extends within the interior cavity from the first end to the second end;
a central pipe positioned about the central post, the central pipe coupled with the first end and the second end, wherein the central pipe extends within the interior cavity from the first end to the second end; and
dead-volume defined between the central pipe and the central post.

11. The adsorbent bed assembly of claim 10 , further comprising a filler material positioned within the dead volume.

12. The adsorbent bed assembly of claim 1 , wherein the first input/output and the second input/output each comprise a distributor plate including a plurality of holes positioned therethrough and in fluid communication with the interior cavity, wherein the first end of the body further comprises a top flange coupled with the distributor plate of the first input/output, and wherein the second end of the body further comprises a bottom cap coupled with the distributor plate of the second input/output.

13. The adsorbent bed assembly of claim 12 , wherein the top flange, the distributor plates, or combinations thereof comprise a dimensionally stable, low-coefficient of thermal expansion (CTE) metal alloy.

14. The adsorbent bed assembly of claim 1 , further comprising adsorbent material positioned within the internal cavity between the central support structure and the outer shell.

15. The adsorbent bed assembly of claim 14 , wherein the adsorbent material defines triangular or substantially triangular shaped channels of porosity, or wherein the adsorbent material defines trapezoidal or substantially trapezoidal shaped channels of porosity.

16. The adsorbent bed assembly of claim 1 , further comprising a flow straightening structure positioned between the first input/output and adsorbent material within the internal cavity, a flow straightening structure positioned between the second input/output and adsorbent material within the internal cavity, or combinations thereof.

17. The adsorbent bed assembly of claim 1 , further comprising compressible insulation positioned on an inner diameter of modules of adsorbent material disposed within the internal cavity, compressible insulation positioned on an outer diameter of modules of adsorbent material disposed within the internal cavity, or combinations thereof.

18. The adsorbent bed assembly of claim 17 , further comprising:
sealant disposed adjacent an inner diameter of modules of adsorbent material within the internal cavity, wherein the sealant is disposed between an end of each segment of inner compressible insulation and one of the anti-telescoping devices;
sealant disposed adjacent an outer diameter of modules of adsorbent material within the internal cavity, wherein the sealant is disposed within a channel in the outer compressible insulation layers; or
combinations thereof.

19. The adsorbent bed assembly of claim 17 , wherein adsorbent material is engaged with the compressible insulation positioned on the outer diameter of modules of adsorbent material disposed within the internal cavity, wherein adsorbent material is engaged with the compressible insulation positioned on the inner diameter of modules of adsorbent material disposed within the internal cavity, or combinations thereof.

20. The adsorbent bed assembly of claim 1 , wherein the anti-telescoping devices are positioned and arranged to maintain pre-load on individual adsorbent modules within the internal cavity, and to prevent telescoping movement of the individual adsorbent modules.

21. A rapid cycle swing adsorption process, the process comprising:
providing an adsorbent bed assembly comprising: a body, the body at least partially defining an interior cavity; a central support structure positioned within the interior cavity and coupled with the body; a plurality of anti-telescoping devices positioned about the central support structure, wherein at least one of the anti-telescoping devices is affixed to the central support structure; and adsorbent material positioned within the internal cavity;
passing a gaseous feed stream containing at least a first component and a second component through an input of the adsorbent bed assembly;
passing the gaseous feed stream through the adsorbent material, and selectively adsorbing the first component on the adsorbent material; and
expelling a product stream, enriched in the second component and depleted in the first component, from the adsorbent bed assembly.

22. The process of claim 21 , further comprising:
providing clamping load to the adsorbent material using the anti-telescoping devices; and
accommodating thermal expansion of adsorbent material or other components of the adsorbent bed assembly using thermally compliant pads positioned on the anti-telescoping devices.

Assignees

• Exxonmobil Upstream Res Co

Inventors

• Fowler Tracy A
• Nagavarapu Ananda
• Whittenberger William Alan
• Attur Haridas
• Davis Brian Lee

Classifications

• B01D2259/401

  using a single bed · CPC title

• B01D53/0473 Primary

  Rapid pressure swing adsorption · CPC title

• B01J20/28052 Primary

  Several layers of identical or different sorbents stacked in a housing, e.g. in a column · CPC title

• B01D53/0407

  Constructional details of adsorbing systems · CPC title

• B01D53/0423

  Beds in columns · CPC title