Methods for capturing CO2 from dilute CO2 streams of varying humidity, including natural gas combine cycle exhaust streams and ambient air streams using KAUST-7 based physisorbents

Patent metadata

Field	Value
Publication number	US-12528044-B2
Application number	US-202218060092-A
Country	US
Kind code	B2
Filing date	Nov 30, 2022
Priority date	Nov 30, 2022
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A method for capturing carbon dioxide (CO 2 ) from a humid gas stream is provided. In certain embodiments, the gas stream is a humid natural gas combine cycle (NGCC) exhaust stream. In certain embodiments, the gas stream is a humid air stream. The humid gas stream comprises CO 2 and oxygen (O 2 ). In the method, the humid gas stream is contacted with a metal organic framework (MOF) material KAUST-7. The CO 2 from the humid gas stream is captured with the KAUST-7 MOF material to generate a CO 2 -concentrated gas stream comprising approximately 1-30% of CO 2 .

First claim

What is claimed is:

1 . A method for capturing CO 2 from a humid natural gas combine cycle (NGCC) exhaust stream, comprising:
contacting the humid NGCC exhaust stream with a metal organic framework (MOF) material KAUST-7, wherein the humid NGCC exhaust stream comprises approximately 1 to 5% of CO 2 and approximately 10-13% of O 2 ; and capturing, with the MOF material KAUST-7, CO 2 from the humid NGCC exhaust stream to generate a CO 2 -concentrated gas stream comprising approximately 10-30% of CO 2 , wherein the relative humidity of the humid NGCC exhaust stream is approximately 45-75% at 20-85° C.

2 . The method of claim 1 , wherein the relative humidity of the humid NGCC exhaust stream is approximately 50-70% at 20-85° C.

3 . The method of claim 1 , wherein the relative humidity of the humid NGCC exhaust stream is approximately 55-65% at 20-85° C.

4 . The method of claim 1 , wherein the balance of the humid NGCC exhaust stream is N 2 .

5 . The method of claim 1 , wherein the CO 2 is captured with the MOF material KAUST-7 at a temperature in the range of approximately 20-85° C. and a pressure in the range of approximately 1-5 bar.

6 . The method of claim 1 , wherein the MOF material KAUST-7 is in the form of pellets, laminates, or other structured forms.

7 . The method of claim 1 , wherein the MOF material KAUST-7 is pretreated at a temperature in the range of approximately 60-150° C. under dynamic vacuum or dry inert gas to remove any previously adsorbed molecules.

8 . The method of claim 1 , wherein the MOF material KAUST-7 comprises an organic binder or an inorganic binder.

Assignees

• Saudi Arabian Oil Co
• Univ King Abdullah Sci & Tech

Inventors

• Eddaoudi Mohamed
• Bhatt Prashant
• Jamal Aqil

Classifications

• B01J20/226

  Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF] (preparation of metal complexes containing carboxylic acid moieties C07C51/418; MOF's per se C07F) · CPC title

• B01D2256/12

  Oxygen · CPC title

• B01D2256/10

  Nitrogen · CPC title

• B01D2253/204

  Metal organic frameworks (MOF's) · CPC title

• Y02C20/40

  of CO2 · CPC title