ディスルファイド・チオカルボネート・レドックスサイクルを用いた二酸化炭素の電気化学的吸収と放出
Poonam Singh1, Joseph H Rheinhardt1, Jarred Z Olson2
1School of Molecular Sciences, Arizona State University , Tempe, Arizona 85281, United States.
Journal of the American Chemical Society
|January 5, 2017
まとめ
新しい電気化学サイクルでは,二酸化炭素 (CO2) を吸収して放出するためにベンジルチオラートを使用しています. この硫黄ベースの方法は,従来のアミン戦略とは異なる新しいCO2捕獲の経路を提供します.
科学分野:
- 電気化学
- 緑の化学
- 材料科学
背景:
- 二酸化炭素 (CO2) の捕獲は気候変動の緩和に不可欠です.
- アミンの洗浄などの既存のCO2捕獲技術は,エネルギー効率と分解の問題に直面しています.
- 代替捕獲剤と電気化学サイクルの開発は活発な研究分野です.
研究 の 目的:
- CO2の吸収と放出のための新しい電気化学サイクルを導入し,特徴づける.
- 二酸化炭素捕獲剤としてベンジルチオラートの使用を調査する.
- 硫黄に結合したチオカルボネートの電気化学的振る舞いを調べるため
主な方法:
- ベンジルジスルファイドからベンジルチオラートを電気化学的に生成する.
- ベンジルチオラートとCO2の反応により,硫黄に結合したモノチオカルボネートを形成する.
- 硫酸ガスの電気化学的酸化により,CO2が放出され,捕獲剤が再生される.
- NMR,FTIR,および電気化学分析を用いた特徴付け.
- 計算による量子化学の計算
主要な成果:
- 安定した硫黄結合モノチオカルボネート添加物 (ベンジル硫ファニル形式) が形成された.
- 電子化学的捕獲-放出サイクルは,イオン性液体と有機溶剤で成功裏に実証されました.
- 量子化学計算では,CO2とベンジルチオラート (−66.3 kJ mol-1) の間の強い結合エネルギーを示した.
- この研究は,硫黄に結合した末端のチオカルボナートの電気化学的行動に関する最初の報告です.
結論:
- 記述された電気化学サイクルは,CO2の吸収と放出のための新しい,潜在的に効率的な方法を提供します.
- ベンジルチオラートは,CO2と安定したアダクトを形成し,効果的な捕獲剤として機能する.
- この硫黄ベースのアプローチは,従来の二酸化炭素捕獲戦略の有望な代替案です.
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