Regenerative adsorbents of modified amines on solid supports
AssigneeUniversity of Southern California
InventorsAlain GOEPPERT, Hang ZHANG, George A. OLAH, G.K. Surya PRAKASH
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Abstract
The invention relates to regenerative, solid sorbents for adsorbing carbon dioxide from a gas mixture, including air, with the sorbent including a modified polyamine and a solid support. The modified polyamine is the reaction product of an amine and an epoxide. The sorbent provides structural integrity, as well as high selectivity and increased capacity for efficiently capturing carbon dioxide from gas mixtures, including the air. The sorbent is regenerative, and can be used through multiple cycles of adsorption-desorption.
Claims14
A solid carbon dioxide sorbent with structural integrity for adsorbing carbon dioxide from a gas mixture, comprising a modified polyamine which is supported upon and within a solid support, wherein the modified polyamine is a reaction product of an excess of an amine selected from the group consisting of tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, triethylenetetramine, diethylenetriamine, polyethylenimine and a mixture thereof, and a diepoxide, a triepoxide, a polyepoxide, and a polymeric epoxide to provide a material with amine functionalities, wherein the solid support is (a) a nano-structured support of silica, silica-alumina, alumina, titanium oxide, calcium silicate, carbon nanotubes, carbon, or a mixture thereof and having a primary particle size of less than about 100 nm;
- or (b) a natural or synthetic clay or a mixture thereof.
Dependencies are inferred from the claim text.