高効率のC2H2/CO2分離のための柔軟で堅固な層の金属有機フレームワークにおける層間対称性制御
Fang Zheng1,2, Rundao Chen1, Zexiang Ding1,2
1Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P. R. China.
Journal of the American Chemical Society
|September 4, 2023
まとめ
高純度アセチレン (C2H2) の生産には,二酸化炭素 (CO2) の不純物を除去する必要があります. この研究では,効率的なC2H2/CO2分離のための2D金属有機フレームワークアドソーブントを開発し,高い容量と選択性を達成しました.
科学分野:
- 材料科学
- 化学工学
- 吸収科学
背景:
- アセチレン (C2H2) を二酸化炭素 (CO2) から効率的に分離することは,高純度のアセチレンを生成するために極めて重要です.
- 同様の運動直径を有するC2H2とCO2を区別できる吸着剤の開発は,高度な吸着プロセスにとって不可欠です.
研究 の 目的:
- 選択的なC2H2/CO2分離のための新しい二次元 (2D) 層の金属有機フレームワーク (MOF) を設計し,合成する.
- MOFの層間空間と層内空間の調節性を調査し,吸収性能を向上させる.
主な方法:
- Ni(4-DPDS) 2CrO4の合成,Ni(4-DPDS) 2MO4 (M = Mo,W) MOFの同構造系である.
- 結晶学的な研究を用いた特徴付け
- 分散修正 (DFT-D) による密度関数理論を用いた計算分析.
- ガス分離性能評価のための実験的突破試験
主要な成果:
- Ni ((4-DPDS) 2CrO4は,C2H2の高C2H2を0.01バーで45.7cm3·g-1と,C2H2/CO2の混合物に対して298Kと1バーで67.7の選択性を示した.
- 層間の対称制御は,MOF構造内のC2H2の効率的なパッキングを容易にした.
- 合わせた孔の閉じ込めと電子環境は,C2H2と強い結合相互作用をもたらした.
結論:
- 開発された2D MOF,Ni{4-DPDS) 2CrO4は,C2/CO2の分離に優れた性能を示し,作業能力と選択性をバランスさせます.
- 階層化されたMOFの調整可能な孔間を活用する戦略は,高度な吸着剤の設計に有効です.
- この材料は,高純度アセチレン生産における産業用途の大きな可能性を示しています.
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