U.S. Department of Energy

West Virginia University

Kevin P Resnik

James Hoffman

McMahan L Gray

Henry W Pennline

David Hopkinson

Daniel J Fauth

Bingyun Li

Xianfeng Wang

Adefemi Egbebi

A method for capturing COcomprising dissolving at least one pure amino acid (AA) in water without the use of a catalyst for establishing protonation of an amino group of the amino acid, adding at least one base solution to the amino acid and water solution to deprotonate the protonated amino group of the amino acid and forming an amino acid-XOH&#x2014;HO wherein X is sodium or potassium, and subjecting COto the amino acid-XOH&#x2014;HO to form new nanomaterials is provided. A regenerable nanofiber is disclosed comprising a NaHCOnanofiber, a KHCOnanofiber, or an amino acid nanofiber made from subjecting a COgas to an amino acid aqueous solvent. Preferably, the amino acid aqueous solvent is one or more of a Gly-NaOH&#x2014;HO, an Ala-NaOH&#x2014;HO, a Phe-NaOH&#x2014;HO, a Gly-KOH&#x2014;HO, an Ala-KOH&#x2014;HO, and a Phe-KOH&#x2014;HO.

Amino acids react with carbon dioxide (CO2) and form nanofibers and nanoflowers

The disclosure provides a COabsorption method using an amine-based solid sorbent for the removal of carbon dioxide from a gas stream. The method disclosed mitigates the impact of water loading on regeneration by utilizing a conditioner following the steam regeneration process, providing for a water loading on the amine-based solid sorbent following COabsorption substantially equivalent to the moisture loading of the regeneration process. This assists in optimizing the COremoval capacity of the amine-based solid sorbent for a given absorption and regeneration reactor size. Management of the water loading in this manner allows regeneration reactor operation with significant mitigation of energy losses incurred by the necessary desorption of adsorbed water.

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Kevin P Resnik