Article for carbon dioxide capture
An article having a flow-through substrate having open channels defined by porous walls, wherein the flow-through substrate includes alumina; and a CO 2 sorbent disposed on the flow-through substrate, wherein the CO 2 sorbent impregnates the porous walls of the flow-through substrate. Methods of making the article, its use for CO 2 capture, and methods for regenerating the article for further use are also disclosed.
1. An article for removing CO 2 from a gas, the article comprising:
a flow-through substrate comprising open channels defined by porous walls;
wherein the flow-through substrate comprises activated alumina; and a CO 2 sorbent disposed on the flow-through substrate;
wherein the CO 2 sorbent impregnates the porous walls of the flow-through substrate;
wherein the porous walls of the flow-through substrate have a porosity of at least 50%; and
wherein the flow-through substrate comprises gamma alumina.
2. The article of claim 1 , wherein the article is capable of sorbing CO 2 at a first temperature and desorbing at least a portion of the sorbed CO 2 at a second temperature.
3. The article of claim 2 , wherein the porous walls of the flow-through substrate have a surface area greater than 200 m2/g.
4. The article of claim 2 , wherein the flow-through substrate is honeycomb shaped.
5. The article of claim 2 , wherein the CO 2 sorbent comprises a polyethyleneimine.
6. The article of claim 1 , wherein the porous walls of the flow-through substrate have a surface area greater than 200 m2/g.
7. The article of claim 6 , wherein the flow-through substrate is honeycomb shaped.
8. The article of claim 1 , wherein the flow-through substrate is honeycomb shaped.
9. The article of claim 1 , wherein the flow-through substrate is honeycomb shaped.
10. The article of claim 1 , wherein the CO 2 sorbent comprises a polyethyleneimine.
11. A method of making the article of claim 1 , the method comprising:
preparing a solution of CO 2 sorbent dispersed in a solvent;
contacting a flow-through substrate comprising channels defined by porous walls with the solution.
12. A method of removing CO 2 from a gas, the method comprising:
providing an article according to claim 1 ;
contacting the article with a gas comprising CO 2 , wherein the contacting occurs at a temperature of up to 40° C.
13. The method of claim 12 , further comprising a step of desorbing CO 2 from the article, comprising heating the article to a temperature above the desorption temperature of the CO 2 .