Acidic gas absorbent, acidic gas removal method and acidic gas removal apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions Corporation
InventorsAkiko Suzuki, Yoshihiko Nakano, Reiko Yoshimura, Toshihiro Imada, Takashi Kuboki, Kenji Sano, Mitsuru Udatsu
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Abstract
The embodiments provide an acidic gas absorbent having low diffusibility, an acidic gas removal method, and an acidic gas removal apparatus. The acidic gas absorbent according to the embodiment comprises: an amine compound having a vapor pressure of 0.001 to 10 Pa at 20° C.; a water-soluble polymer compound having a mass-average molecular weight of 900 to 200000 and not containing a functional group having a pKa value greater than 7 except for hydroxy; and water.
Claims7
An acidic gas absorbent comprising:
- an aminoalcohol having a vapor pressure of 0.005 to 5 Pa at 20° C.;
- a water-soluble polymer compound which has a mass-average molecular weight of 900 to 20000) and which does not contain a functional group having a pKa value greater than 7 except for hydroxy;
- and
- water,
- wherein
- said water-soluble polymer compound is at least one selected from the group consisting of carboxy vinyl polymer, alkali metal salts of carboxy vinyl polymer, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, alginic acid, and polysaccharide, and
- said absorbent comprises the aminoalcohol in an amount of 5 to 80 wt % based on a total mass of the absorbent.
Dependencies are inferred from the claim text.