Metal organic framework absorbent platforms for removal of co2 and h2s from natural gas

Patent metadata

Field	Value
Publication number	US-2019282949-A1
Application number	US-201916431860-A
Country	US
Kind code	A1
Filing date	Jun 5, 2019
Priority date	Apr 7, 2015
Publication date	Sep 19, 2019
Grant date	—

Abstract

Provided herein are metal organic frameworks comprising metal nodes and N-donor organic ligands which have high selectivity and stability in the present of gases and vapors including H2S, H2O, and CO2. Methods include capturing one or more of H2S, H2O, and CO2 from fluid compositions, such as natural gas.

First claim

What is claimed is:

1 . A method of capturing chemical species from a fluid composition, comprising:
contacting a metal organic framework of formula [M a M b F 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z with a fluid composition including at least carbon dioxide and hydrogen sulfide; and capturing carbon dioxide and hydrogen sulfide from the fluid composition; wherein M a is selected from Zn 2+ , Co 2+ , Ni 2+ , Mn 2+ , Zr 2+ , Fe 2+ , Ca 2+ , Ba 2+ , Pb 2+ , Pt 2+ , Pd 2+ , Ru 2+ , Rh 2+ , Mg 2+ , Al +3 , Fe 2+ , Fe +3 , Cr 2+ , Cr 3+ , Ru 2+ , Ru 3+ , and Co 3+ ; wherein M b is selected from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII; wherein the Ligand is a polyfunctional organic ligand, and x is 1 or more; wherein n is 1, w is 1, x is 2, y is 0 to 4, solvent is a guest molecule, and z is at least 1.

2 . The method of claim 1 , wherein M b is selected from Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3+ , V 5+ , Sc 3+ , In 3+, Nb 5+ , and Y 3+ .

3 . The method of claim 1 , wherein the Ligand comprises pyridine, pyrazine, pyrimidine, pyridazine, triazine, thiazole, oxazole, pyrrole, imidazole, pyrazole, triazole, oxadiazole, thiadiazole, quinoline, benzoxazole, or benzimidazole.

4 . The method of claim 1 , wherein the metal organic framework includes open metal sites.

5 . The method of claim 1 , wherein capturing comprises physical adsorption, chemisorption, or both physical adsorption and chemisorption of the one or more captured chemical species by the metal organic framework.

6 . The method of claim 5 , wherein chemisorption occurs by one or more captured chemical species chemically interacting with one or more open metal sites of the metal organic framework.

7 . The method of claim 1 , wherein the fluid composition further comprises water, methane, or both water and methane.

8 . The method of claim 1 , further comprising desorbing carbon dioxide and hydrogen sulfide.

9 . The method of claim 1 , further comprising changing the pressure, temperature, or both pressure and temperature of the capture environment to alter the affinity of one or more of carbon dioxide and hydrogen sulfide for the metal organic framework adsorbent.

10 . The method of claim 1 , wherein carbon dioxide and hydrogen sulfide are captured from the fluid composition simultaneously.

11 . A method of capturing chemical species from a fluid composition, comprising:
contacting a metal organic framework of formula [M a M b F 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z with a fluid composition including at least carbon dioxide and hydrogen sulfide; and capturing carbon dioxide and hydrogen sulfide from the fluid composition; wherein M a is selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII; wherein M b is selected from Al +3 , Ga 3+ , Fe +2 , Fe +3 , Cr 2+ , Cr 3+, Ti 3+, V 3+ , V 5+ , Sc 3+ , In 3+ , Nb 5+ , and Y 3+ ; wherein the Ligand is a polyfunctional organic ligand, and x is 1 or more; wherein n is 1, w is 1, x is 2, y is 0 to 4, solvent is a guest molecule, and z is at least 1.

12 . The method of claim 11 , wherein M a is selected from Zn 2+ , Co 2+ , Ni 2+ , Mn 2+ , Zr 2+ , Fe 2+ , Ca 2+ , Ba 2+ , Pb 2+ , Pt 2+ , Pd 2+ , Ru 2+ , Rh 2+ , Mg 2+ , Al +3 , Fe 2+ , Fe +3 , Cr 2+ , Cr 3+ , Ru 2+ , Ru 3+ , and Co 3+ .

13 . The method of claim 11 , wherein the Ligand comprises pyridine, pyrazine, pyrimidine, pyridazine, triazine, thiazole, oxazole, pyrrole, imidazole, pyrazole, triazole, oxadiazole, thiadiazole, quinoline, benzoxazole, or benzimidazole.

14 . The method of claim 11 , wherein the metal organic framework includes open metal sites.

15 . The method of claim 11 , wherein capturing comprises physical adsorption, chemisorption, or both physical adsorption and chemisorption of the one or more captured chemical species by the metal organic framework.

16 . The method of claim 15 , wherein chemisorption occurs by one or more captured chemical species chemically interacting with one or more open metal sites of the metal organic framework.

17 . The method of claim 11 , wherein the fluid composition further comprises water, methane, or both water and methane.

18 . The method of claim 11 , further comprising desorbing carbon dioxide and hydrogen sulfide.

19 . The method of claim 11 , further comprising changing the pressure, temperature, or both pressure and temperature of the capture environment to alter the affinity of one or more of carbon dioxide and hydrogen sulfide for the metal organic framework adsorbent.

20 . The method of claim 11 , wherein carbon dioxide and hydrogen sulfide are captured from the fluid composition simultaneously.

Assignees

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

Inventors

• Eddaoudi Mohamed
• Cadiau Amandine
• Bhatt Prashant M
• Adil Karim
• Belmabkhout Youssef

Classifications

• C10L2290/542

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

• C10L3/103

  Sulfur containing contaminants · CPC title

• C10L3/104

  Carbon dioxide · CPC title

• B01D2253/204

  Metal organic frameworks (MOF's) · CPC title

• B01D2253/116

  Molecular sieves other than zeolites · CPC title