Carbon dioxide adsorbents and production methods thereof, carbon dioxide capture module including the same, and methods for separating carbon dioxide using the same
AssigneeSamsung Electronics Co., Ltd.
InventorsHyuk Jae Kwon, Soon Chul Kwon, Hyun Chul Lee
Life of this patent
Estimating the term…
Abstract
A carbon dioxide adsorbent may include an amorphous mixed metal oxide including a divalent first metal (M1), a trivalent second metal (M2) different from the divalent first metal (M1), an alkali metal (M3), and an element (A) with an electronegativity of about 2.0 to about 4.0. The alkali metal (M3) may be present in the form of a crystalline halide, an oxide, or a combination thereof. The carbon dioxide adsorbent may also be used in a method of separating carbon dioxide.
Claims20
A carbon dioxide adsorbent comprising:
- an amorphous mixed metal oxide including a divalent first metal (M1), a trivalent second metal (M2) different from the divalent first metal (M1), an alkali metal (M3), and an element (A) with an electronegativity of about 2.0 to about 4.0, the alkali metal (M3) being present in a form of a crystalline halide, an oxide, or a combination thereof.
A method of producing a carbon dioxide adsorbent, comprising:
- dissolving a salt of a divalent first metal (M1) and a salt of a trivalent second metal (M2) in water to prepare a first aqueous solution, the trivalent second metal (M2) being different from the divalent first metal (M1);
- adjusting a pH of the first aqueous solution to be basic to form a precipitate;
- separating the precipitate;
- and
- performing a first treatment or a second treatment on the precipitate, the first treatment including treating the precipitate with a second aqueous solution of a salt including an element (A) with an electronegativity of about 2.0 to about 4.0 and a third aqueous solution of an alkali metal (M3) salt to form a first ion-exchanged mixed metal hydroxide, separating the first ion-exchanged mixed metal hydroxide, and calcining the first ion-exchanged mixed metal hydroxide to obtain a metal oxide composite, the second treatment including treating the precipitate with the second aqueous solution to form a second ion-exchanged mixed metal hydroxide, separating the second ion-exchanged mixed metal hydroxide, calcining the second ion-exchanged mixed metal hydroxide to obtain a calcined product, and treating the calcined product with the third aqueous solution to obtain the metal oxide composite, the alkali metal (M3) being present in a form of a crystalline halide, an oxide, or a combination thereof.
A method of separating carbon dioxide, comprising:
- contacting a gas mixture containing carbon dioxide with a carbon dioxide adsorbent including an amorphous mixed metal oxide composite, the amorphous mixed metal oxide including a divalent first metal (M1), a trivalent second metal (M2) different from the divalent first metal (M1), an alkali metal (M3), and an element (A) with an electronegativity of about 2.0 to about 4.0, the alkali metal (M3) being present in a form of a crystalline halide, an oxide, or a combination thereof.
Dependencies are inferred from the claim text.