(19)
(11) EP 2 727 882 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
18.06.2014 Bulletin 2014/25

(88) Date of publication A3:
07.05.2014 Bulletin 2014/19

(43) Date of publication:
07.05.2014 Bulletin 2014/19

(21) Application number: 12792175.7

(22) Date of filing: 29.05.2012
(51) International Patent Classification (IPC): 
C01B 31/20(2006.01)
B01J 37/34(2006.01)
C25B 11/03(2006.01)
 B01J 23/42(2006.01)
C25B 1/00(2006.01)
(86) International application number:
PCT/JP2012/003505
(87) International publication number:
WO 2012/164912 (06.12.2012 Gazette 2012/49)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 31.05.2011 JP 2011122067
03.10.2011 JP 2011219484

(71) Applicant: Japan Science and Technology Agency
Kawaguchi-shi Saitama 332-0012 (JP)

(72) Inventors:
  • KAMAI, Ryo
    Osaka 540-6207 (JP)
  • SUZUKA, Michio
    Osaka 540-6207 (JP)
  • NAKANISHI, Shuji
    Osaka 540-6207 (JP)
  • HASHIMOTO, Kazuhito
    Tokyo 113-8654 (JP)
  • HELLER, Adam
    Austin, Texas 78701 (US)
  • ZHAO, Yong
    Tokyo 113-8654 (JP)

(74) Representative: Müller-Boré & Partner Patentanwälte PartG mbB 
Friedenheimer Brücke 21
80639 München
80639 München (DE)

   


(54) CARBON DIOXIDE ENRICHMENT DEVICE


(57) An object of the present invention is to provide a carbon dioxide enrichment device that has high enrichment performance, and also enables a significant reduction in energy required during driving. Provided is a carbon dioxide enrichment device, comprising:
a first gas diffusion electrode 1;
a second gas diffusion electrode 2 separated from the first gas diffusion electrode 1; and
an electrolytic solution 3 existing between the first gas diffusion electrode 1 and the second gas diffusion electrode 2 to be in contact with the first gas diffusion electrode 1 and the second gas diffusion electrode 2,
wherein the electrolytic solution 3 contains a solvent and a solute dissolved in the solvent, and the solute is dissolved in the solvent to form a dissolved inorganic carbon containing at least one of carbonic acid, hydrogen carbonate ions, and carbonic acid ions; oxygen is consumed by an oxygen reduction reaction on the first gas diffusion electrode 1, whereby a dissolved inorganic carbon is formed by a dissolution and ionization reaction of carbon dioxide in the solvent; the dissolved inorganic carbon derived from the solute or the dissolved inorganic carbon formed on the first gas diffusion electrode 1 is transported to the second gas diffusion electrode 2; and oxygen is formed from the solvent in the vicinity of the second gas diffusion electrode 2 by an oxidation reaction of the solvent on the second gas diffusion electrode 2, and carbon dioxide is formed from the dissolved inorganic carbon.