Title:
METHOD FOR FIXING CARBON DIOXIDE
Document Type and Number:
WIPO Patent Application WO/2023/140055
Kind Code:
A1
Abstract:
Provided is a method for fixing carbon dioxide, the method comprising a first step S1 for passing seawater through a nanofiltration membrane to thereby generate a first concentrated liquid, a second step S2 for adding an alkali to the first concentrated liquid generated in the first step S1 and inducing precipitation of alkali earth metal carbonate crystals, and a third step S3 for carrying out solid-liquid separation to recover the alkali earth metal carbonate crystals from the first concentrated liquid. The first step S1 is provided with a concentration step S11 for concentrating an NF membrane permeation liquid that has permeated the nanofiltration membrane and generating a second concentrated liquid, and an electrodeposition step S13 for carrying out electrodeposition of the second concentrated liquid to thereby separate an acid solution and an alkali solution. The second step S2 includes adding the alkali solution obtained in the electrodeposition step S13 to the first concentrated liquid.
Inventors:
NAKAGAKI TAKAO (JP)
MYERS COREY ADAM (JP)
FUJIMOTO SHO (JP)
KATO YOSHIHIKO (JP)
HIRANO SATORU (JP)
HAYAMIZU MOTOYORI (JP)
MIHO YOSHIAKI (JP)
MYERS COREY ADAM (JP)
FUJIMOTO SHO (JP)
KATO YOSHIHIKO (JP)
HIRANO SATORU (JP)
HAYAMIZU MOTOYORI (JP)
MIHO YOSHIAKI (JP)
Application Number:
PCT/JP2022/047822
Publication Date:
July 27, 2023
Filing Date:
December 26, 2022
Export Citation:
Assignee:
UNIV WASEDA (JP)
JGC CORP (JP)
SASAKURA ENG CO LTD (JP)
JGC CORP (JP)
SASAKURA ENG CO LTD (JP)
International Classes:
B01D53/14; B01D53/62; B01D61/02; B01D61/58; C02F1/04; C02F1/42; C02F1/44; C02F1/469
Domestic Patent References:
| WO2021261410A1 | 2021-12-30 | |||
| WO2022030529A1 | 2022-02-10 | |||
| WO2022226333A1 | 2022-10-27 |
Foreign References:
| JP2011056345A | 2011-03-24 | |||
| US20130248445A1 | 2013-09-26 | |||
| US20130020259A1 | 2013-01-24 | |||
| JP2012213767A | 2012-11-08 | |||
| JP2015524787A | 2015-08-27 | |||
| JP2005262078A | 2005-09-29 |
Attorney, Agent or Firm:
ARAWORE INTERNATIONAL IP LAW FIRM (JP)
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