Abstract:
Provided are a carbon dioxide adsorbent comprising a mesoporous inorganic oxide; a method for manufacturing the carbon dioxide adsorbent; an adsorbent module including the carbon dioxide adsorbent; and a method for separating carbon dioxide using the carbon dioxide adsorbent. The inorganic oxide has a crystalline alkali metal or alkaline-earth metal halogenide supported on the surface thereof, and a chemical species supported on the surface thereof and containing phosphorus (P), sulfur (S) and boron (B).
Abstract:
Provided are a carbon dioxide adsorbent, a method for producing the carbon dioxide adsorbent, a carbon dioxide adsorbent module comprising the carbon dioxide adsorbent, and a method for separating carbon dioxide using the carbon dioxide adsorbent, wherein the carbon dioxide adsorbent comprises an amorphous composite metal oxide including: a first metal (M^1) having a valence of 2; a second metal (M^2) having a valence of 3, which is different from the first metal (M^1) having a valence of 2; an alkaline metal (M^3); and an element (A) having electronegativity of about 2.0 to about 4.0, and here, the alkaline metal (M^3) is present in a form of a crystalline halide, an oxide, or a mixture thereof.
Abstract:
PURPOSE: A carbon dioxide adsorbent is provided to have an excellent carbon dioxide capture capacity, to be able to be operated at a high temperature, and to be usefully used in adsorption of pre-combustion carbon dioxide due to the high carbon dioxide adsorption performance. CONSTITUTION: A carbon dioxide adsorbent comprises a divalent first metal (M_1), a trivalent second metal (M_2), an element (A) with the electronegativity of 2.0-4.0, and a complex metal oxide with an amorphous structure. A manufacturing method of the carbon dioxide adsorbent comprises a step of obtaining mixed aqueous solution by dissolving a divalent metal salt and a trivalent metal salt in water (S1); a step of precipitating a complex metal hydroxide by adjusting the pH of the aqueous solution to the basic; a step of separating the complex metal hydroxide (S2); a step of obtaining a mixture by mixing the complex metal hydroxide with an aqueous solution of salt including the element with the electronegativity of about 2.0-4.0; a step of forming ion-exchanged complex metal hydroxide by adjusting the PH of the mixture under 7 and stirring (S3); a step of separating the ion-exchanged complex metal hydroxide; and a step of obtaining complex metal oxide by plasticizing the ion-exchanged complex metal hydroxide. A carbon dioxide capture module includes the carbon dioxide adsorbent. [Reference numerals] (S1) Obtaining mixed aqueous solution of a divalent metal salt and a trivalent metal salt; (S2) Precipitating a complex metal hydroxide; (S3) Adding element with the electronegativity of about 2.0-4.0 and adjusting the PH; (S4) Obtaining complex metal oxide by filtering, drying, and plasticizing