Adsorbent materials and methods of adsorbing carbon dioxide

Patent metadata

Field	Value
Publication number	US-12059647-B2
Application number	US-202318193822-A
Country	US
Kind code	B2
Filing date	Mar 31, 2023
Priority date	Nov 16, 2015
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Methods of designing zeolite materials for adsorption of CO 2 . Zeolite materials and processes for CO 2 adsorption using zeolite materials.

First claim

What is claimed is:

1. A pressure swing adsorption process for separating CO 2 from a feed gas mixture, wherein the process comprises:
a) subjecting the feed gas mixture comprising CO 2 to an adsorption step by introducing the feed gas mixture into a feed input end of an adsorbent bed, wherein the adsorbent bed comprises:
a feed input end and a product output end; and
an adsorbent material selective for adsorbing CO 2 , wherein the adsorbent material comprises a zeolite having a Si/Al ratio of between about 5 and about 45 and with a framework structure selected from the group consisting of CHA, FER, LTA, RHO, UFI, and a combination thereof;
wherein the adsorbent bed is operated at a first pressure and at a first temperature wherein at least a portion of the CO 2 in the feed gas mixture is adsorbed by the adsorbent bed and wherein a gaseous product depleted in CO 2 exits the product output end of the adsorbent bed;
b) stopping the introduction of the feed gas mixture to the adsorbent bed before breakthrough of CO 2 from the product output end of the adsorbent bed;
c) reducing the pressure in the adsorbent bed to a second pressure resulting in desorption of at least a portion of CO 2 from the adsorbent bed; and
d) recovering at least a portion of CO 2 from the adsorbent bed.

2. The pressure swing adsorption process of claim 1 , wherein the first temperature is from about −20° C. to about 80° C. and the first pressure is such that the partial pressure of CO 2 is from about 3 bar to about 25 bar.

3. The pressure swing adsorption process of claim 1 , wherein the first temperature is from about 0° C. to about 50° C. and the first pressure is such that the partial pressure of CO 2 is from about 3 bar to about 10 bar.

4. The pressure swing adsorption process of claim 1 , wherein the first temperature is from about 0° C. to about 50° C. and the first pressure is such that the partial pressure of CO 2 is from about 15 bar to about 25 bar.

5. The pressure swing adsorption process of claim 1 , wherein the second pressure is such that the partial pressure of CO 2 is from about 0.1 bar to about 10 bar.

6. The pressure swing adsorption process of claim 1 , wherein the feed gas mixture comprises a natural gas stream.

7. The pressure swing adsorption process of claim 1 , wherein the zeolite comprises a cation concentration of less than about 10%.

8. The pressure swing adsorption process of claim 1 , wherein the adsorbent material has a working capacity of about 3.0 mmol/cc to about 17.0 mmol/cc.

9. The pressure swing adsorption process of claim 1 , wherein the adsorbent bed comprises one or more open flow channels throughout its entire length through which the feed gas mixture is passed.

10. The pressure swing adsorption process of claim 1 , wherein the adsorbent bed comprises a parallel channel contactor.

Assignees

• Exxonmobil Technology & Engineering Company
• Georgia Tech Res Inst

Inventors

• Ravikovitch Peter I
• Sholl David
• Paur Charanjit
• Strohmaier Karl G
• Fang Hanjun
• Kulkarni Ambarish R
• Awati Rohan V
• Kamakoti Preeti

Classifications

• C10L2290/542

  Adsorption of impurities during preparation or upgrading of a fuel · CPC title

• C10L2290/12

  Regeneration of a solvent, catalyst, adsorbent or any other component used to treat or prepare a fuel · CPC title

• C10L3/104

  Carbon dioxide · CPC title

• B01J20/3491

  by pressure treatment · CPC title

• B01J20/18

  Synthetic zeolitic molecular sieves · CPC title