Absorbent for capturing carbon dioxide including amino acid having multi amine groups and metal hydroxide

摘要

Provided is an absorbent for capturing carbon dioxide. The absorbent may include an amino acid with multiple amine groups and an alkali-metal hydroxide mixed with the amino acid and thus, may increase an absorption capacity for carbon dioxide. When a sterically hindered effect is induced to the amino acid with multiple amine groups, the absorption capacity for carbon dioxide may increase and heat of absorption reaction may decrease and thus, energy consumed for regeneration of an absorbent may be reduced. The absorbent for capturing carbon dioxide may include amino acid with multiple amine groups and the metal hydroxide, and may provide a functional group around the amine groups to cause an sterically hindered effect and thus, the absorption capacity for carbon dioxide and an carbon dioxide absorption rate may increase, and the capital cost for a carbon dioxide capturing process and an operating cost may be significantly reduced.

主权项

1. An aqueous absorbent for capturing carbon dioxide, the absorbent comprising:
a sterically hindered amino acid including multiple amine groups; and an alkali-metal hydroxide, the alkali-metal hydroxide and the amino acid being present in an equivalent ratio of about 1:1 (mol).