JP7453651B2 - 電気化学セルおよび二酸化炭素回収システム - Google Patents
電気化学セルおよび二酸化炭素回収システム Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/326—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 in electrochemical cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
- C25B11/031—Porous electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/042—Electrodes formed of a single material
- C25B11/043—Carbon, e.g. diamond or graphene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Description
CO2吸着速度=CO2吸着量/吸着時間・・・(2)
CO2脱離速度=CO2脱離量/脱離時間・・・(3)
サイクル時間=吸着時間+脱離時間・・・(4)
ここで、CO2回収量=CO2吸着量=CO2脱離量とすると、次の数式(5)が成り立つ。
この数式(5)から、CO2吸着速度が大きいほどCO2回収速度が大きくなることが分かる。
(Ka:順反応の速度定数、Pa:CO2の分圧、θ:CO2吸着サイト被覆率、Ka´:逆反応の速度定数)
CO2吸着サイト被覆率θは、次の数式(7)で得ることができる。
CO2最大吸着量は、次の数式(8)で得ることができる。
数式(6)~(8)から、CO2吸着サイト密度が高いほどCO2最大吸着量が大きくなり、CO2最大吸着量が大きいほどCO2吸着サイト被覆率θが小さくなり、CO2吸着サイト被覆率θが小さいほどCO2吸着速度が大きくなることが分かる。
本発明は上述の実施形態に限定されることなく、本発明の趣旨を逸脱しない範囲内で、以下のように種々変形可能である。また、上記各実施形態に開示された手段は、実施可能な範囲で適宜組み合わせてもよい。
102 作用極
102a 作用極側基材(電極基材)
102b CO2吸着材
102c 作用極導電性物質(導電性物質)
102d 作用極側バインダ(バインダ)
103 対極
103b 電気活性補助材(補助材)
104 絶縁層
106 イオン伝導性物質
Claims (14)
- CO2吸着材(102b)を含む作用極(102)と、対極(103)と、を備え、
前記作用極と前記対極との間に電圧が印加されることで、前記対極から前記作用極に電子が供給され、前記CO2吸着材は電子が供給されることに伴ってCO2含有ガスに含まれるCO2と結合し、
前記CO2吸着材は、結晶性多孔体であり、電子の授受を行ってCO2と結合する官能基が規則的に配置された分子構造を有しており、
前記CO 2 吸着材は、前記官能基が結晶格子の架橋部に規則的に配置されている電気化学セル。 - 前記結晶性多孔体は、金属有機構造体、共有結合性有機構造体および炭素質材料の少なくとも1つである請求項1に記載の電気化学セル。
- 前記結晶性多孔体は金属有機構造体であり、前記官能基はケトン基である請求項2に記載の電気化学セル。
- 前記金属有機構造体は、Alイオンにケトン基を含むベンゾフェノンジカルボン酸塩が配位している請求項3に記載の電気化学セル。
- 前記対極は、電子の授受を行う補助材(103b)を含んでおり、
前記対極の電位が前記作用極の電位より高くなる第1の電圧が前記対極と前記作用極との間に印加されることで、前記補助材から前記CO2吸着材に電子が供給され、前記CO2吸着材がCO2と結合する請求項1ないし4のいずれか1つに記載の電気化学セル。 - 前記第1の電圧よりも低い第2の電圧が前記対極と前記作用極との間に印加されることで、前記CO2吸着材から前記補助材に電子が供給され、前記CO2吸着材が吸着しているCO2を脱離する請求項5に記載の電気化学セル。
- 前記作用極は導電性物質(102c)を含んでおり、前記導電性物質は前記CO2吸着材と混合した状態となっている請求項1ないし6のいずれか1つに記載の電気化学セル。
- 前記導電性物質は、炭素質材料から構成されている請求項7に記載の電気化学セル。
- 前記作用極は、導電性を有する電極基材(102a)を含んでおり、
前記CO2吸着材は、前記電極基材に保持されている請求項1ないし8のいずれか1つに記載の電気化学セル。 - 前記電極基材は、炭素質材料もしくは金属材料からなり、前記CO2含有ガスが通過可能な孔が形成された多孔質構造を備えている請求項9に記載の電気化学セル。
- 前記作用極は、前記CO2吸着材を前記電極基材に保持させるためのバインダ(102d)を含んでいる請求項9または10に記載の電気化学セル。
- 前記作用極と前記対極との間にイオン伝導性を有するイオン伝導性物質(106)が設けられており、前記イオン伝導性物質はイオン液体もしくは固体電解質である請求項1ないし11のいずれか1つに記載の電気化学セル。
- 前記作用極と前記対極との間に、導電性を有さない絶縁層(104)が設けられている請求項1ないし12のいずれか1つに記載の電気化学セル。
- 請求項1ないし13のいずれか1つに記載の電気化学セルを備える二酸化炭素回収システム。
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EP21202376.6A EP3991827A1 (en) | 2020-10-30 | 2021-10-13 | Carbon dioxide recovery system and working electrode |
CN202111268691.XA CN114432849A (zh) | 2020-10-30 | 2021-10-29 | 二氧化碳回收系统和工作电极 |
US17/515,666 US11964232B2 (en) | 2020-10-30 | 2021-11-01 | Carbon dioxide recovery system and working electrode |
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DE10355087A1 (de) * | 2003-11-24 | 2005-06-09 | Basf Ag | Verfahren zur elektrochemischen Herstellung eines kristallinen porösen metallorganischen Gerüstmaterials |
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