CO2 - 空気中の選択的吸収物質: 水分化なしに中性カルバム酸を形成する逆脂質二層構造
Fuyuhiko Inagaki1, Chiaki Matsumoto1, Takashi Iwata1
1Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan.
Journal of the American Chemical Society
|March 18, 2017
まとめ
研究者は水性アルキアミンCO2吸収剤を開発し 水なしで選択的に二酸化炭素を吸収します 二酸化炭素の吸収と貯蔵 (CCS) と直接の空気吸収 (DAC) のこの突破は,二酸化炭素の分離と浄化を簡素化しています.
科学分野:
- 化学工学
- 環境科学
- 材料科学
背景:
- 排気ガスと空気にはCO2と水分が含まれており,選択的なCO2吸収が難しくなります.
- 吸収されたCO2 (湿気CO2) から水を取り除くには外部エネルギーが必要で,これは炭素の吸収と貯蔵 (CCS) と直接の空気吸収 (DAC) に問題をもたらします.
研究 の 目的:
- 水よりもCO2の選択性が向上したCO2吸収剤を開発する.
- 二酸化炭素吸収効率を向上させ,水分除去を簡素化するヒドロホビック群の可能性を調査する.
主な方法:
- アルキラミンCO2吸収剤に水性フェニル群を導入する.
- オーソ・メタ・パラキシリレンジアミン (OXDA,MXDA,PXDA) の空気中のCO2吸収に対する試験
- 水中のMXDA·CO2添加物の構造と性質の分析
- MXDA·CO2の熱再生により,乾燥したCO2とカルボキシル酸が得られる.
主要な成果:
- アルキラミンの防水フェニル群は,水に対するCO2吸収選択性を有意に改善した.
- OXDA,MXDA,PXDAは,空気から水分のないCO2吸収を示した.
- MXDA·CO2は,水性溶液でも無水カルバム酸として形成され,水嫌フェニル群と逆脂質二層構造に起因する.
- MXDA·CO2を加熱すると,Grignard型反応で103-120°Cで乾燥CO2と炭酸が得られる.
結論:
- 新しい水害性アルキラミンベースのCO2吸収剤は,水分を吸収せずに選択的にCO2を吸収するための有望な解決策を提供します.
- 開発された材料は,CCSとDACのアプリケーションのエネルギー要求を削減し,乾燥CO2の取得プロセスを簡素化します.
- 独特の無水カルバム酸の形成と,その後のグリニャード型反応は,CO2の利用と化学合成のための新しい道を開きます.
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