Acyclic aza-containing ligands for use as catalytic carbon capture systems

Patent metadata

Field	Value
Publication number	US-9259725-B2
Application number	US-201314051380-A
Country	US
Kind code	B2
Filing date	Oct 10, 2013
Priority date	Oct 10, 2013
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

According to one embodiment, a catalyst includes a metal ion, and an acyclic ligand having at least one aza-containing moiety, where the ligand is complexed to the metal ion.

First claim

What is claimed is:

1. A catalyst, comprising:
a metal ion; and
an acyclic ligand having at least one aza-containing moiety and at least one m-membered heterocyclic amine moiety, wherein m is from 3 to 6,
wherein the ligand is complexed to the metal ion.

2. A catalyst, comprising:
a metal ion; and
an acyclic ligand having at least one aza-containing moiety,
wherein the ligand is complexed to the metal ion,
wherein the metal ion is a zinc ion.

3. The catalyst of claim 1 , wherein the metal ion is an ion of a metal selected from a group consisting of: Zn, Cu, Co and Ni.

4. A catalyst, comprising:
a metal ion; and
an acyclic ligand having at least one aza-containing moiety,
wherein the ligand is complexed to the metal ion,
wherein the acyclic ligand has the formula

wherein a is 0 to 1,
wherein each R group independently comprises a moiety selected from the group consisting of a hydrogen and a C 1-10 alkyl,
wherein each R′ group independently comprises a heterocyclic moiety, wherein at least one of the R′ groups comprises a heterocyclic amine moiety.

5. The catalyst of claim 4 , wherein at least one of the R groups is a methyl.

6. The catalyst of claim 4 , wherein at least one R′ groups is an m-membered heterocyclic amine moiety, wherein m is from 3 to 6.

7. The catalyst of claim 4 , wherein at least one of the R′ groups is a heteroaromatic moiety.

8. The catalyst of claim 7 , wherein the heteroaromatic moiety is selected from a group consisting of: a pyrrole, a pyrroline, an imidazole, a thiazole, an oxazole, and a triazole.

9. The catalyst of claim 1 , wherein the catalyst exhibits a catalytic activity for conversion of CO 2 into bicarbonate about equal to or greater than a zinc cyclen catalyst.

10. The catalyst of claim 4 , wherein the system exhibits a catalytic activity for conversion of CO 2 into bicarbonate greater than a zinc cyclen catalyst under otherwise identical conditions.

11. The catalyst of claim 4 , wherein the catalyst exhibits a catalytic activity of about 80,000 mol −1 s −1 for the conversion of CO 2 into bicarbonate at about 75° C.

12. The catalyst of claim 1 , wherein the catalyst is characterized as exhibiting a greater catalytic activity in hydration of CO 2 than a zinc cyclen catalyst having a formula:

under otherwise identical conditions.

13. A method of making the catalyst of claim 1 , comprising:
providing a first compound having at least two amine moieties;
providing a second compound having a carbonyl moiety;
reacting the first and second compound to form a third compound;
reducing carbonyl groups present in the third compound to form the ligand; and
coupling the metal ion to the ligand.

14. The method of claim 13 , wherein the first compound has the formula

wherein n is 0 or 1, and wherein R independently comprises a moiety selected from the group consisting of a hydrogen and a C 1-10 alkyl.

15. The method of claim 13 , wherein the second compound has the formula

wherein R′ is a heterocyclic amine moiety and R″ is H or OH.

16. A method of depolymerizing amorphous silica, comprising using the catalyst of claim 1 .

17. A method of hydrolyzing ester compounds using the catalyst of claim 1 .

18. A method for capturing CO 2 , comprising:
contacting the catalyst of claim 1 with a gas comprising CO 2 to at least partially remove CO 2 from the gas.

19. The method of claim 18 , further comprising liberating the CO 2 after the contacting, wherein the liberating comprises heating the catalyst.

20. The catalyst of claim 1 , wherein the heterocyclic amine moiety is a heteroaromatic moiety.

Assignees

• L Livermore Nat Security Llc

Inventors

• Floyd Iii William C
• Valdez Carlos A
• Aines Roger
• Baker Sarah
• Satcher Jr Joe H

Classifications

• B01D53/62 Primary

  Carbon oxides · CPC title

• B01D2255/20792

  Zinc · CPC title

• B01J31/22 Primary

  Organic complexes · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D2252/103

  Water · CPC title