Methods and formulations using carbonic anhydrase and reaction compound combinations
Disclosed is a formulation for the absorption of CO 2 , which comprises water, at least one CO 2 absorption compound and a carbonic anhydrase as an activator to enhance the absorption capacity of the CO 2 absorption compound. The invention also concerns the use of carbonic anhydrase, in a CO 2 absorption solution to increase the CO 2 absorption rate of such solution.
1. A formulation for CO 2 reactions comprising:
(a) a solution comprising:
(i) water; and
(ii) at least one teritiary amino reaction compound having the formula R 3 N and enabling reaction (A):
R 3 N+CO 2 +H 2 O HCO 3 − +R 3 NH + (A); and
(b) carbonic anhydrase to catalyze reaction (B):
CO 2 +H 2 O HCO 3 +H + (B).
2. The formulation of claim 1 , wherein the tertiary amino reaction compound R 3 N comprises a tertiary alkanolamine.
3. The formulation of claim 2 , wherein the tertiary alkanolamine is selected from triethanolamine (TEA) and N-methyldiethanolamine (MDEA).
4. The formulation of claim 1 , wherein the carbonic anhydrase is directly present in and flows with the solution, is immobilized on a support, or is immobilized on a packing.
5. A method for absorption of CO 2 comprising contacting gaseous CO 2 with an aqueous CO 2 absorption solution comprising at least one CO 2 absorption compound and carbonic anhydrase wherein the carbonic anhydrase enables at least a 80% increase in CO 2 transfer rate relative to the same aqueous CO 2 absorption solution without the carbonic anhydrase.
6. The method of claim 5 , wherein the carbonic anhydrase is directly present in and flows with the aqueous CO 2 absorption solution, is immobilized on a support, or is immobilized on a packing.
7. A method to enhance CO 2 absorption, comprising providing carbonic anhydrase within a packed bed reactor; contacting gaseous CO 2 with an aqueous CO 2 absorption solution comprising at least one CO 2 absorption compound within the packed bed reactor in the presence of the carbonic anhydrase; and operating the packed bed reactor to enable increased CO 2 transfer rate of at lest 80% relative to the same absorption solution without the carbonic anhydrase.
8. The method of claim 7 , wherein the carbonic anhydrase is directly present in and flows with the aqueous CO 2 absorption solution, is immobilized on a support, or is immobilized on packing of the packed bed reactor.
9. A formulation for absorption of CO 2 comprising water and at least one CO 2 absorption compound comprising a carbonate salt, the water and the at least one CO 2 absorption compound forming an alkaline carbonate salt based solution; and carbonic anhydrase to enhance the absorption of CO 2 into the alkaline carbonate salt based solution.
10. The formulation of claim 9 , wherein the carbonate salt comprises potassium carbonate or sodium carbonate.
11. The formulation of claim 9 , wherein the carbonic anhydrase is directly present in and flows with the alkaline carbonate salt based solution, is immobilized on a support, or is immobilized on a packing.
12. A formulation for absorption of CO 2 comprising water, at least one aliphatic CO 2 absorption compound non-reactive directly with CO 2 , and carbonic anhydrase to enhance the absorption of the CO 2 into the water.
13. The formulation of claim 12 , wherein the CO 2 absorption compound comprises an alkanolamine.
14. The formulation of claim 13 , wherein the alkanolamine comprises a tertiary alkanolamine.
15. The formulation of claim 12 , wherein the carbonic anhydrase is directly present in and flows with the water, is immobilized on a support, or is immobilized on a packing.
16. A formulation for catalysis of the following reaction:
CO 2 +H 2 O HCO 3 +H +
comprising water, at least one reaction compound selected from carbonates, sodium carbonate, potassium carbonate, alkyleneamines, =alkyl ethers of alkylene glycols, dimethylether of polyethylene glycol, tetraethylene glycol dimethyl ether, aminoethers, 2-substituted piperidine alcohols, piperazine, piperazine derivatives, ionic liquid, a liquid comprising a cation and an anion having a carboxylate function, and a combination thereof, the water and the at least one reaction compound forming a solution; and carbonic anhydrase to catalyze the reaction.
17. The formulation of claim 16 , wherein the carbonic anhydrase is directly present in and flows with the solution, is immobilized on a support, or is immobilized on a packing.
18. A method for catalysis of the following reaction:
CO 2 +H 2 O HCO 3 +H +
the method comprising providing a formulation comprising water; at least one reaction compound selected from carbonates, sodium carbonate, potassium carbonate, alkyleneamines, alkyl ethers of alkylene glycols, dimethylether of polyethylene glycol, tetraethylene glycol dimethyl ether, aminoethers, 2-substituted piperidine alcohols, piperazine, piperazine derivatives, ionic liquid, a liquid comprising a cation and an anion having a carboxylate function, and a combination thereof, the water and the at least one reaction compound forming a solution; and carbonic anhydrase to catalyze the reaction.
19. The method of claim 18 , wherein the carbonic anhydrase is directly present in and flows with the solution, is immobilized on a support, or is immobilized on a packing.
20. A formulation for catalysis of the following reaction:
CO 2 +H 2 O HCO 3 +H +
comprising water, at least one reaction compound comprising a cation and an anion having a carboxylate function, the water and the at least one reaction compound forming a solution; and carbonic anhydrase to catalyze the reaction.
21. The formulation of claim 20 , wherein the reaction compound comprising a cation and an anion having a carboxylate function is selected from bmim-acetate and hmim-acetate.
22. The method of claim 20 , wherein the carbonic anhydrase is directly present in and flows with the solution, is immobilized on a support, or is immobilized on a packing.