Carbon dioxide absorbent material, pellet, and filter

Patent metadata

Field	Value
Publication number	US-2018147527-A1
Application number	US-201615578838-A
Country	US
Kind code	A1
Filing date	Jun 24, 2016
Priority date	Jun 26, 2015
Publication date	May 31, 2018
Grant date	—

Abstract

Even in the case where a gas contains water, a decrease in absorption efficiency of carbon dioxide contained in the gas is suppressed. A carbon dioxide absorbent material ( 10 ) absorbs carbon dioxide contained in a gas and contains a tetravalent lithium silicate that exhibits water solubility.

First claim

1 . A carbon dioxide absorbent material that absorbs carbon dioxide contained in a gas,
the carbon dioxide absorbent material comprising a tetravalent lithium silicate that exhibits water solubility.

2 . The carbon dioxide absorbent material according to claim 1 , further comprising potassium carbonate,
wherein a molar ratio of the potassium carbonate to the lithium silicate is 0.01 or more and 0.1 or less.

3 . The carbon dioxide absorbent material according to claim 1 , wherein in a case where an aqueous solution containing the lithium silicate in an amount of 0.17% by weight is prepared, the aqueous solution has a transmittance of 88% or more for light applied to the aqueous solution, the light having a wavelength in a range of 240 nm or more and 400 nm or less.

4 . The carbon dioxide absorbent material according to claim 1 , wherein after an aqueous solution prepared by dissolving the lithium silicate in distilled water in a ratio of 1 g of the lithium silicate relative to 20 g of the distilled water is filtered, and 100 g of a resulting filtrate is maintained at 110° C. for 2 hours, an evaporation residue having a weight of 3.6 g or more is yielded.

5 . The carbon dioxide absorbent material according to claim 1 , wherein after an aqueous solution prepared by dissolving the lithium silicate in distilled water in a ratio of 1 g of the lithium silicate relative to 20 g of the distilled water is filtered, and 100 g of a resulting filtrate is maintained at 110° C. for 2 hours and further maintained at 700° C. for 10 hours, an evaporation residue having a weight of 2.9 g or more is yielded.

6 . A pellet that absorbs carbon dioxide contained in a gas,
the pellet comprising the carbon dioxide absorbent material according to claim 1 .

7 . A filter that absorbs carbon dioxide contained in a gas,
the filter comprising the pellet according to claim 6 therein.

8 . The carbon dioxide absorbent material according to claim 2 , wherein in a case where an aqueous solution containing the lithium silicate in an amount of 0.17% by weight is prepared, the aqueous solution has a transmittance of 88% or more for light applied to the aqueous solution, the light having a wavelength in a range of 240 nm or more and 400 nm or less.

9 . The carbon dioxide absorbent material according to claim 2 , wherein after an aqueous solution prepared by dissolving the lithium silicate in distilled water in a ratio of 1 g of the lithium silicate relative to 20 g of the distilled water is filtered, and 100 g of a resulting filtrate is maintained at 110° C. for 2 hours, an evaporation residue having a weight of 3.6 g or more is yielded.

10 . The carbon dioxide absorbent material according to claim 2 , wherein after an aqueous solution prepared by dissolving the lithium silicate in distilled water in a ratio of 1 g of the lithium silicate relative to 20 g of the distilled water is filtered, and 100 g of a resulting filtrate is maintained at 110° C. for 2 hours and further maintained at 700° C. for 10 hours, an evaporation residue having a weight of 2.9 g or more is yielded.

11 . A pellet that absorbs carbon dioxide contained in a gas,
the pellet comprising the carbon dioxide absorbent material according to claim 2 .

12 . A filter that absorbs carbon dioxide contained in a gas,
the filter comprising the pellet according to claim 11 therein.

Assignees

• Sharp Kk

Inventors

• Tajima Hideharu
• Naka Takayuki
• Yamada Hirohisa
• Kishira Kentaro

Classifications

• B01J20/10

  comprising silica or silicate · CPC title

• B01D2253/25

  Coated, impregnated or composite adsorbents · CPC title

• C01B33/32

  Alkali metal silicates ({C01B33/24} , C01B33/26 take precedence) · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D2253/112

  Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106 · CPC title