Method for extracting calcium, method for fixing carbon dioxide, and carbon dioxide fixation apparatus
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsKazuki MURAKAMI, Koji SAKAI, Yoichi TAKAHASHI, Tatsuya SASAKI
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Abstract
A method for fixing carbon dioxide may include: circulating a solvent containing a polyol compound through a slag layer formed by charging slag containing calcium in a container; aerating, with a gas containing carbon dioxide, a calcium extract obtained by passage of the solvent through the slag layer in the circulating; and separating, by solid-liquid separation, a precipitate precipitated from a mixed solution obtained in the aerating. In the circulating, the solvent may be circulated at a velocity at which the slag layer does not flow.
Claims16
A method for extracting calcium, the method comprising:
- circulating a solvent comprising a polyol compound through a slag layer formed by charging slag comprising calcium in a container,
- wherein, in the circulating, the solvent is circulated at a velocity at which the slag layer does not flow.
A method for fixing carbon dioxide, the method comprising:
- circulating a solvent comprising a polyol compound through a slag layer formed by charging slag comprising calcium in a container;
- aerating, with a gas comprising carbon dioxide, a calcium extract obtained by passage of the solvent through the slag layer in the circulating;
- and
- separating, by solid-liquid separation, a precipitate precipitated from a mixed solution obtained in the aerating,
- wherein in the circulating, the solvent is circulated at a velocity at which the slag layer does not flow.
A carbon dioxide fixation apparatus, comprising:
- a container configured for forming a slag layer by being charged with slag comprising calcium;
- a supply portion configured to supply the container with a solvent comprising a polyol compound;
- an adjusting portion configured for adjusting an amount of the solvent supplied, to maintain a velocity at which the slag layer does not flow;
- a retaining portion configured to retain a calcium extract discharged from the container after passing through the slag layer;
- an aeration portion configured to aerate, with a gas comprising carbon dioxide, the extract retained in the retaining portion;
- and
- a separation portion configured to subject, to solid-liquid separation, a precipitate in a mixed solution obtained by aeration by the aeration portion.
Dependencies are inferred from the claim text.