安定したエタン選択MOFにルイス基本サイトの固定化 一段階のエチレンをテルナー混合物から分離する
Xiao-Wen Gu1, Jia-Xin Wang1, Enyu Wu1
1State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Journal of the American Chemical Society
|February 3, 2022
まとめ
この研究では,ガス混合物からエチレン (C2H4) の効率的な1段階浄化のために,アミノ機能化されたUiO-67を導入します. 新型吸着剤は,石油化学産業におけるエチレン生産に優れた選択性と能力を示しています.
科学分野:
- 材料科学
- 化学工学
- 分離科学
背景:
- エチレン (C2H4) をアセチレン (C2H2) とエチレン (C2H6) の三元混合物から効率的に浄化することは,石油化学産業にとって極めて重要です.
- 一段階のアドソープション分離のための既存の方法は,高い性能を達成する上で課題に直面しています.
- 効率的なC2H4浄化のために,特別の性質を持つ高度な吸着剤の開発が必要である.
研究 の 目的:
- 三重混合物からポリマーグレードのエチレン (C2H4) の効率的な1段階浄化のための新しい吸着剤の設計と合成.
- C2H6選択性金属有機フレームワーク (MOF) にルイスベースサイトを組み込む効果を調査する.
- エチレン (C2H4) を通過させながら,アセチレン (C2H2) とエタン (C2H6) を同時に吸収するアドソーベンツの能力を評価する.
主な方法:
- アミノ機能化されたUiO-67 (UiO-67-NH2) を,アミノ群を安定したC2H6-選択的MOFに組み込むことによって合成する.
- 吸着剤の特徴は,理論的な計算と,吸着メカニズムを理解するためにインシット赤外線スペクトロスコピーを用いる.
- 様々な条件下でC2H2/C2H6/C2H4三元混合物を用いた突破的な実験による性能評価
主要な成果:
- アミノ機能化されたUiO-67-NH2) 2は,親MOFと比較してC2H2およびC2H6の吸収能力が著しく向上した.
- C2H2/C2H4およびC2H6/C2H4分離の基準選択性を達成し,以前に報告された材料を超えました.
- 突破的な実験で0.55 mmol g-1の驚くべきC2H4生産性を示した.
結論:
- UiO-67にアミノ群を組み込むことは,C2H2とC2H6の吸収を効果的に強化し,C2H4の効率的な浄化を可能にします.
- 毛穴封じ込めと機能性アミノ群の相乗効果は,C2H4よりもC2H2とC2H6との強い相互作用につながります.
- UiO-67-(NH2) 2は,ポリマーグレードのエチレンの工業的な1段階浄化のための非常に有望な吸着剤です.
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