Carbon dioxide gas absorbent containing lithium silicate
AssigneeKabushiki Kaisha Toshiba
InventorsKato Masahiro, Kazuaki Nakagawa, Toshiyuki Ohashi, Sawako Yoshikawa, Kenji Essaki
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Abstract
Disclosed is a carbon dioxide gas absorbent containing lithium silicate reacting with a carbon dioxide gas to form lithium carbonate and represented by the general formula, LixSiyOz, where x, y, z are integers meeting the requirement of x+4y−2z=0. The lithium content x in the general formula should desirably be at least 4.
Claims28
A carbon dioxide gas absorbent containing
- lithium silicate;
- and
- an alkali carbonate selected from the group consisting of sodium carbonate and potassium carbonate, wherein
- the lithium silicate is represented by the general formula:
- LixSiyOz
- where x in the general formula is an integer of at least 4, and x, y and z are integers meeting the requirement of x+4y−2z=0.
A carbon dioxide gas absorbent containing lithium silicate powder having an average particle diameter of 0.1 to 50 μm and represented by the general formula:
- LixSiyOz
- where x in the general formula is an integer of at least 4, and x, y and z are integers meeting the requirement of x+4y−2z=0, wherein
- the carbon dioxide gas absorbent further comprises an alkali carbonate selected from the group consisting of sodium carbonate and potassium carbonate.
A carbon dioxide gas absorbent containing porous lithium silicate particles having an average particle diameter in a range from 0.1 to 5 mm and represented by the general formula:
- LixSiyOz
- where x in the general formula is an integer of at least 4, and x, y and z are integers meeting the requirement of x+4y−2z=0, wherein
- the carbon dioxide gas absorbent further comprises an alkali carbonate selected from the group consisting of sodium carbonate and potassium carbonate.
A carbon dioxide gas absorbent containing lithium silicate represented by the general formula:
- LixSiyOz
- where x in the general formula is an integer of at least 4, and x, y and z are integers meeting the requirement of x+4y−2z=0,
- wherein the carbon dioxide gas absorbent is in the form of a porous molded body;
- and
- the carbon dioxide gas absorbent further comprises an alkali carbonate selected from the group consisting of sodium carbonate and potassium carbonate.
Dependencies are inferred from the claim text.