Regenerative adsorbents of modified amines on nano-structured supports
AssigneeUniversity of Southern California
InventorsAlain GOEPPERT, Hang ZHANG, G.K. Surya PRAKASH, George A. OLAH
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Abstract
The invention relates to regenerative, solid sorbent for adsorbing carbon dioxide from a gas mixture, with the sorbent including a modified polyamine and a nano-structured solid support. The modified polyamine is the reaction product of an amine and an aldehyde. 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 operations of absorption-desorption cycles.
Claims29
A solid sorbent for adsorbing carbon dioxide from a gas mixture, comprising a modified polyamine and a nano-structured solid support, wherein the modified polyamine is the reaction product of an amine and an aldehyde.
The sorbent according to any preceding claim, wherein the amine is a primary, secondary or tertiary alkyl- or alkanolamine, an aromatic amine, a mixed amine, or a combination thereof.
The sorbent according to any preceding claim, wherein the amine is tetraethylenepentamine, pentaethylenehexamine, triethylenetetramine, diethylenetriamine, ethylenediamine, hexaethyleneheptamine, a polyethylenimine, or a combination thereof.
The sorbent according to any preceding claim, wherein the aldehyde is a simple aldehyde, dialdehyde, trialdehyde, a polymeric aldehyde compound or a mixture thereof.
The sorbent according to any preceding claim, wherein the aldehyde is formaldehyde, glyoxal (ethanedial), glutaraldehyde (pentane-1,5-dial), succindialdehyde (butanedial), o-phthalaldehyde, m-phthalaldehyde, p-phthalaldehyde or a mixture thereof.
Use of a modified polyamine to provide a solid sorbent for absorbing carbon dioxide from a gas mixture, characterized in that the modified polyamine is the reaction product of an amine and an aldehyde and is provided upon a nano-structured solid support.
Dependencies are inferred from the claim text.