JP7478769B2 - 二酸化炭素処理装置、二酸化炭素処理方法及びエチレンの製造方法 - Google Patents
二酸化炭素処理装置、二酸化炭素処理方法及びエチレンの製造方法 Download PDFInfo
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- JP7478769B2 JP7478769B2 JP2022038104A JP2022038104A JP7478769B2 JP 7478769 B2 JP7478769 B2 JP 7478769B2 JP 2022038104 A JP2022038104 A JP 2022038104A JP 2022038104 A JP2022038104 A JP 2022038104A JP 7478769 B2 JP7478769 B2 JP 7478769B2
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- 239000001569 carbon dioxide Substances 0.000 title claims description 137
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Description
図1は、本発明の実施形態に係る二酸化炭素処理装置100を示すブロック図である。図1に示すように、本実施形態に係る二酸化炭素処理装置100は、回収装置1と、電気化学反応部2と、電気エネルギー貯蔵装置3と、増炭反応装置4と、熱交換部5と、を備える。回収装置1は、CO2濃縮部11と、CO2吸収部12と、を備える。電気化学反応部2は、電解セルを備える。電気エネルギー貯蔵装置3は、変換部31と、電気エネルギー貯蔵部32と、を備える。増炭反応装置4は、熱反応部41と、気液分離部42と、を備える。
[カソード半反応式]
2CO3 2-+4H2O→2CO+8OH-
[アノード半反応式]
8OH-→O2+2H2O+4OH-
[全反応式]
2CO3 2-+2H2O→2CO+O2+4OH-
[カソード半反応式]
2CO+4H2O→C2H4+4OH-
[アノード半反応式]
4OH-→O2+2H2O
[全反応式]
2CO+2H2O→C2H4+2O2
本発明の実施形態に係る二酸化炭素処理方法は、例えば上述の二酸化炭素処理装置100を用いることにより実行される。具体的に本実施形態の二酸化炭素処理方法は、強アルカリ水溶液からなる電解液に二酸化炭素ガスを接触させ、二酸化炭素を電解液に溶解させて吸収させる工程(a)と、電解液中の溶存二酸化炭素を電気化学的に還元する工程(b)と、を含むことが好ましい。本実施形態の二酸化炭素処理方法は、エチレンの製造方法に利用できる。
[カソード半反応式]
2CO2+2H2O→2CO+4OH-
[アノード半反応式]
4OH-→O2+2H2O
[全反応式]
2CO2+2H2O→2CO+O2
2 電気化学反応部(電気化学反応装置)
4 増炭反応装置
12 CO2吸収部
20 一酸化炭素供給路
21 第1電解セル
22 第2電解セル
211,221 カソード
212,222 アノード
213,223 アニオン交換膜(電解質膜)
214a,225a カソード側液流路
216a,226a アノード側液流路
224a カソード側ガス流路
100 二酸化炭素処理装置
Claims (4)
- 二酸化炭素を強アルカリの電解液に溶解させて回収する回収装置と、
前記回収装置で回収された二酸化炭素を電気化学的に還元する電気化学反応装置と、
前記電気化学反応装置に電気エネルギーを供給する電気エネルギー貯蔵装置と、
を備える二酸化炭素処理装置であって、
前記電気化学反応装置は、
前記電解液が流れ、前記電解液に溶解している二酸化炭素を電気化学的に一酸化炭素に還元する第1電解セルと、
前記第1電解セルで生成される一酸化炭素を電気化学的にエチレンに還元する第2電解セルと、を備え、
前記電気エネルギー貯蔵装置は、
再生可能エネルギーを電気エネルギーに変換する変換部と、
前記変換部で変換された電気エネルギーを貯蔵するニッケル水素電池と、を備え、
前記二酸化炭素処理装置は、前記第1電解セルを流れた前記電解液を前記ニッケル水素電池に供給する液流路をさらに備える、二酸化炭素処理装置。 - 前記電気化学反応装置は、
前記第1電解セルと前記第2電解セルの間に設けられ、前記第1電解セルで生成された一酸化炭素を前記第2電解セルに供給する一酸化炭素供給路をさらに備える、請求項1に記載の二酸化炭素処理装置。 - 前記第1電解セルは、
カソードと、
アノードと、
前記カソードと前記アノードの間に設けられた電解質膜と、
前記カソードに隣接して設けられ、二酸化炭素が溶解した電解液が流れるカソード側液流路と、
前記アノードに隣接して設けられ、電解液が流れるアノード側液流路と、を備え、
前記第2電解セルは、
カソードと、
アノードと、
前記カソードと前記アノードの間に設けられた電解質膜と、
前記カソードに隣接して設けられ、ガスが流れるカソード側ガス流路と、
前記カソードに隣接して設けられ、電解液が流れるカソード側液流路と、
前記アノードに隣接して設けられ、電解液が流れるアノード側液流路と、を備え、
前記一酸化炭素供給路は、前記第1電解セルにおける前記カソード側液流路の出口と、前記第2電解セルにおける前記カソード側ガス流路の入口と、を接続するように設けられる、請求項2に記載の二酸化炭素処理装置。 - 前記電気化学反応装置で二酸化炭素が還元されて生成されたエチレンを多量化して増炭する増炭反応装置をさらに備える、請求項1から3いずれかに記載の二酸化炭素処理装置。
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JP2017053013A (ja) | 2015-09-11 | 2017-03-16 | 株式会社東芝 | 電解装置 |
US20210140056A1 (en) | 2018-04-11 | 2021-05-13 | University Of Delaware | Electrochemical generation of carbon-containing products from carbon dioxide and carbon monoxide |
US20210381116A1 (en) | 2020-06-09 | 2021-12-09 | Opus 12 Incorporated | System and method for high concentration of multielectron products or co in electrolyzer output |
US20220033351A1 (en) | 2019-08-19 | 2022-02-03 | Jeremiah Lee Piper | System and Method for Producing Propylene and Acrylonitrile from Carbon Dioxide and Ethylene |
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JP2017053013A (ja) | 2015-09-11 | 2017-03-16 | 株式会社東芝 | 電解装置 |
US20210140056A1 (en) | 2018-04-11 | 2021-05-13 | University Of Delaware | Electrochemical generation of carbon-containing products from carbon dioxide and carbon monoxide |
US20220033351A1 (en) | 2019-08-19 | 2022-02-03 | Jeremiah Lee Piper | System and Method for Producing Propylene and Acrylonitrile from Carbon Dioxide and Ethylene |
US20210381116A1 (en) | 2020-06-09 | 2021-12-09 | Opus 12 Incorporated | System and method for high concentration of multielectron products or co in electrolyzer output |
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