Solid carbon dioxide absorbent including amine or a compound thereof for use in the capturing process of dry carbon dioxide, and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9844766-B2
Application number	US-201114355134-A
Country	US
Kind code	B2
Filing date	Oct 31, 2011
Priority date	Oct 31, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

The present invention relates to a method for manufacturing a carbon dioxide absorbent and to the absorbent manufactured by the method. The method comprises: (A) a step of preparing a slurry composition including a carrier composition containing a support, an inorganic binder, and a solvent; (B) a step of preparing solid particles by spray drying the thus-prepared slurry composition; (C) a step of manufacturing a carrier by dry calcining the thus-prepared solid particles; and (D) a step of receiving an amine compound into the pores of the thus-manufactured carrier. According to the absorbent of the present invention, an absorbing reaction and a regenerating reaction at a low temperature range (less than or equal to 100° C. may be conducted, and therefore, the cost for capturing CO 2 in a dry capturing process may be expected to decrease.

First claim

What is claimed is:

1. A method for manufacturing a carbon dioxide absorbent, the method comprising the steps of:
(A) preparing a slurry composition including a carrier composition containing a support and an inorganic binder, and a solvent;
(B) preparing solid particles by spray drying the prepared slurry composition;
(C) manufacturing a carrier by dry calcining the solid particles; and
(D) receiving an amine compound into pores of the manufactured carrier.

2. The method of claim 1 , wherein the support comprises at least one of a basic support, a neutral support, and an amphoteric support.

3. The method of claim 2 , wherein the basic support includes calcium oxide, zinc oxide, and magnesium oxide, the neutral support includes carbon molecular sieve or carbon nano tubes, a magnesium and aluminum containing oxide, a magnesium and silicon containing oxide, a calcium and aluminum containing oxide, and the amphoteric support includes alumina, titanium dioxide, zirconium oxide, cesium oxide.

4. The method of claim 1 , wherein a content of the support is in a range of 20 to 85 parts by weight, based on the total weight of the carrier composition.

5. The method of claim 1 , wherein the inorganic binder includes a cement-like inorganic binder, a clay-like inorganic binder, and a ceramic-like inorganic binder.

6. The method of claim 5 , wherein the cement-like inorganic binder is calcium silicate or calcium aluminate, the clay-like inorganic binder is bentonite or kaolinite, and the ceramic-like inorganic binder is alumina sol, silica sol or boehmite.

7. The method of claim 1 , wherein a content of the inorganic binder is in a range of 5 to 50 parts by weight, based on the total weight of the carrier composition.

8. The method of claim 1 , wherein the carrier composition is contained in an amount of 15 to 60 parts by weight, based on the total weight of the slurry composition.

9. The method of claim 1 , wherein the slurry composition further includes one or more organic additives including a dispersant, a defoamer and an organic binder.

10. The method of claim 9 , wherein the dispersant is an anionic dispersant, a cationic dispersant, an amphoteric dispersant or a non-ionic dispersant, the defoamer is a metal soap- or polyester-based material, and the organic binder is one or more selected from the group consisting of a polyvinylalcohol-based material, a polyglycol-based material and methylcellulose.

11. The method of claim 1 , wherein after performing step (A), further comprising:
stirring and comminuting the slurry composition; and
removing foreign substances from the stirred and comminuted slurry composition.

12. The method of claim 1 , wherein the drying in step (C) is performed under an air atmosphere at 110 to 150° C.

13. The method of claim 1 , wherein the calcining in step (C) is performed under an air, nitrogen, helium or reducing gas atmosphere at 350 to 1000° C.

14. The method of claim 1 , wherein step (D) comprises dissolving the amine compound in a solvent; and mixing the carrier prepared in step (C) with the solvent and stirring the resultant product.

15. The method of claim 14 , wherein the amine compound comprises at least one primary amine compound, at least one piperazine-based cyclic secondary amine compound, at least one cyclic tertiary amine compound, and at least one amine compound polymer.

16. The method of claim 14 , wherein a content of the amine compound is in a range of 5 to 70 parts by weight, based on the weight of the carrier.

17. The method of claim 14 , wherein the solvent is distilled water, an organic solvent or a mixture thereof.

18. The method of claim 14 , wherein the stirring is performed at 30 to 80° C.

19. The method of claim 15 , wherein the at least one primary amine compound is selected from the group consisting of monoethanolamine (MEA), tetraethylenepentamine (TEPA), and tetraethylenetetraamine (TETA).

20. The method of claim 15 , wherein the at least one piperazine-based cyclic secondary amine compound is selected from the group consisting of piperazine and 2-piperidine ethanol.

21. The method of claim 15 , wherein the at least one cyclic tertiary amine compound is 1-(2-hydroxyethyl) piperazine.

22. The method of claim 15 , wherein the at least one amine compound polymer is polyethyleneimine (PEI).

Assignees

• Eom Tae Hyoung
• Lee Joong Beom
• Ryu Chong Kul
• Kim Kyeong Sook
• Korea Electric Power Corp

Inventors

• Eom Tae Hyoung
• Lee Joong Beom
• Ryu Chong Kul
• Kim Kyeong Sook

Classifications

• B01J20/3425

  of sorbents or filter aids comprising organic materials · CPC title

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title

• B01J20/28061

  being in the range 100-500 m2/g · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01J20/3248

  the functional group or the linking, spacer or anchoring group as a whole comprising at least one type of heteroatom selected from a nitrogen, oxygen or sulfur, these atoms not being part of the carrier as such · CPC title