高度に選択的なガス分離のための二重膜
Hongwei Fan1,2, Alexander Mundstock1, Armin Feldhoff1
1Institute of Physical Chemistry and Electrochemistry , Leibniz Universität Hannover , Callinstraße 3A , D-30167 Hannover , Germany.
Journal of the American Chemical Society
|July 19, 2018
まとめ
2種類の共性有機フレームワーク (COF) を使用した新しい複合膜は,優れたガス分離を提供します. このCOF-COF二層膜は,H2/CO2のような混合物に対する選択性が向上し,以前の基準を上回っています.
科学分野:
- 材料科学
- 化学工学
- ナノテクノロジー
背景:
- 配合性有機フレームワーク (COF) は,安定性のために分子シート膜に希望を示しています.
- 精密に制御された小さな開口を持つCOF膜の開発は,効果的なガス分離に不可欠です.
研究 の 目的:
- COF-COF複合膜を改良してガスを分離する.
- COF-LZU1 と ACOF-1 で構成された二層膜の性能を調査する.
主な方法:
- 2次元の COF-COF 複合膜を二層構成で,多孔のサポートで合成した.
- イミンベースのCOF-LZU1とアジンベースのACOF-1を順番に成長させるための温度変動の溶熱方法を使用した.
- H2/CO2,H2/N2,H2/CH4の混合物に対するガス分離性能の評価
主要な成果:
- COF-LZU1-ACOF-1二層膜は,個々のCOF膜と比較して,著しく高い分離選択性を示した.
- この性能の向上は,二重層構造の内部で交互に絡み合っている孔網の形成に起因する.
- 複合膜の性能は,ガス分離のための確立されたロブソン上限を超えました.
結論:
- 開発されたCOF-LZU1-ACOF-1二層膜は,分子シート技術における重要な進歩を表しています.
- 膜は優れた選択性を示し,性能の限界を超え,産業用ガス分離アプリケーションの可能性を示している.
- 複合膜はまた,高い熱と長期の動作の安定性を持っています.
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