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

Patent metadata

Field	Value
Publication number	US-2018093218-A1
Application number	US-201615564935-A
Country	US
Kind code	A1
Filing date	Apr 7, 2016
Priority date	Apr 7, 2015
Publication date	Apr 5, 2018
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 H 2 S, H 2 O, and CO 2 . Methods include capturing one or more of H 2 S, H 2 O, and CO 2 from fluid compositions, such as natural gas.

First claim

What is claimed is:

1 . A method of capturing chemical species from a fluid composition, the method comprising
contacting a first metal organic framework characterized by the formula [M a M b F 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z with a fluid composition comprising one or more of carbon dioxide, water, and hydrogen sulfide; and capturing one or more of carbon dioxide, water, and hydrogen sulfide from the fluid composition.

2 . The method of claim 1 , wherein M a comprises elements selected from periodic groups IB, IIA, IIB, IIIA, IVA, IVB, VIB, VIIB, and VIII, M b comprises elements selected from periodic groups IIIA, IIIB, IVB, VB, VIB, and VIII, Ligand comprises an organic, poly-functional, N-donor ligand

3 . The method of claim 1 , wherein M a comprises Cu 2+ , 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+ Cd 2+ , Mg +2 , Al +3 , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ru 2+ , Ru 3− , or Co 3+ , and M b comprises Al +3 , Fe +2 , Fe +3 , Cr 2+ , Cr 3+ , Ti 3+ , V 3− , V 5+ , Sc 3+ , In 3+ , N 5+ , or Y 3+ .

4 . The method of claim 1 , wherein M a comprises Ni 2+ and M b comprises Al −3 , Fe +2 , Fe +3 , V 3+ , V +5 , or Nb +5 .

5 . 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.

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

7 . The method of claim 1 , wherein capturing comprises chemisorption of the one or more captured chemical species by the metal organic framework.

8 . The method of claim 7 , wherein chemisorption occurs by one or more captured chemical species chemically interacting with one or more open metal sites of the metal organic framework.

9 . The method of claim 1 , wherein the fluid composition further comprises methane.

10 . The method of claim 1 , further comprising capturing two or more of carbon dioxide, water, and hydrogen sulfide from the fluid composition.

11 . The method of claim 10 , further comprising desorbing two or more of carbon dioxide, water, and hydrogen sulfide.

12 . The method of claim 11 , wherein two or more of carbon dioxide, water, and hydrogen sulfide are sequentially desorbed in descending order of affinity.

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

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

15 . The method of claim 14 further comprising changing the temperature of the capture environment to alter the affinity of one or more of carbon dioxide, water, and hydrogen sulfide for the metal organic framework adsorbent.

16 . The method of claim 1 , simultaneously or separately contacting the fluid composition with a second metal organic framework, characterized by the formula [M c M d F 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z , wherein the second metal organic framework is different from the first metal organic framework.

17 . The method of claim 16 , wherein the first metal organic framework is characterized by the formula [NiNbF 6-n (O/H 2 O) w (Ligand) x (solvent) y ] z , and the second metal organic framework is characterized by the formula [M c M d F 6-n ,(O/H 2 O) w (Ligand) x (solvent) y ] z , wherein M c comprises Ni+ and M d comprises Al +3 , Fe +2 , or Fe +3 .

18 . The method of claim 1 , wherein the metal organic framework adsorbent is in the form of a fixed bed, a packed column, or combinations thereof.

19 . The method of claim , further comprising desorbing one or more of carbon dioxide, water, and hydrogen sulfide.

20 . The method of claim 19 , wherein one or more of capturing and desorbing is effected by multicolumn pressure-temperature swing adsorption

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

• B01J20/3483

  by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling · CPC title

• B01D2259/40007

  Controlling pressure or temperature swing adsorption · CPC title