Pcstructures including supported polyamines and methods of making the supported polyamines
Methods of making a poly(propylenimine) (PPI) sorbent, a PPI sorbent, structures including the PPI sorbent, methods of separating CO 2 using the PPI sorbent, and the like, are disclosed.
1. A material comprising:
a porous structure having supported thereon a poly(propylenimine) (PPI) sorbent, wherein the PPI sorbent is in a plurality of pores of the porous structure, wherein the PPI sorbent comprises a linear PPI, a branched PPI, a hyperbranched PPI, or a combination thereof;
wherein the PPI sorbent is physically impregnated in the porous structure and not covalently bonded to the porous structure;
wherein the PPI sorbent has a loading of about 10% to 75% by weight of the composite and a counterion content, wherein the counterion content is present and less than about 0.1 mol counterion/mol amine.
2. The material of claim 1 , wherein the porous structure is mesoporous.
3. The material of claim 2 , wherein the porous structure is supported on a structure.
4. The material of claim 1 , wherein the porous structure is selected from the group consisting of: silica, alumina, aluminosilicates, zirconia, germania, magnesia, titania, hafnia, iron oxide, mixed oxides composed of those elements, and a combination thereof.
5. The material of claim 1 , wherein the porous structure is a honeycomb structure.
6. The material of claim 5 , wherein the porous honeycomb structure is a honeycomb structure monolith.
7. The material of claim 1 , wherein the porous structure is a powder, a pellet, a foam, a laminate, an extrudate, or a combination thereof.
8. The material of claim 1 , wherein the porous structure is a gas permeable scaffold having a porous surface.
9. The material of claim 8 , wherein the porous surface is a porous layer on the gas permeable scaffold.
10. The material of claim 9 , wherein the porous layer is selected from the group consisting of: alumina, silica, and aluminosilica.
11. The material of claim 1 , wherein the PPI sorbent comprises a branched PPI that includes one or more of each of: a primary amine, a secondary amine, and a tertiary amine.
12. A material comprising:
a porous structure having supported thereon a linear poly(propylenimine) (PPI) sorbent, wherein the linear PPI sorbent is in a plurality of pores of the porous structure, wherein the PPI sorbent is covalently bonded within pores of the porous structure, wherein the linear PPI sorbent has a loading of about 10% to 75% by weight of the composite and a counterion content, wherein the counterion content is present and less than about 0.1 mol counterion/mol amine.
13. The material of claim 12 , wherein the linear PPI includes only primary amines, secondary amines, or both primary amines and secondary amines.
14. The material of claim 12 , wherein the porous structure is mesoporous.
15. The material of claim 14 , wherein the porous structure is selected from the group consisting of: silica, alumina, aluminosilicates, zirconia, germania, magnesia, titania, hafnia, iron oxide, mixed oxides composed of those elements, and a combination thereof.
16. The material of claim 12 , wherein the porous structure is a honeycomb structure.
17. The material of claim 16 , wherein the porous honeycomb structure is a honeycomb structure monolith.
18. The material of claim 12 , wherein the porous structure is a powder, a pellet, a foam, a laminate, an extrudate, or a combination thereof.
19. The material of claim 12 , wherein the porous structure is a gas permeable scaffold having a porous surface.
20. The material of claim 19 , wherein the porous surface is a porous layer on the gas permeable scaffold.
21. The material of claim 14 , further comprising a porous layer disposed on the surface of the porous structure, wherein a portion of the PPI sorbent is in a plurality of pores of the porous layer.
22. The material of claim 21 , wherein the porous layer is selected from the group consisting of: alumina, silica, and aluminosilica.