レコードキセノン/クリプトン分離のための頑丈で放射線に耐えるホフマン型金属有機フレームワーク
Jiyan Pei1, Xiao-Wen Gu1, Cong-Cong Liang1
1State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Journal of the American Chemical Society
|February 9, 2022
まとめ
2つの新しいホフマン型金属有機フレームワーク (MOF) は,クセノン (Xe) の吸収とクリプトン (Kr) の分離よりも選択性を記録しています. これらの高度な吸着剤は,産業用ガス分離アプリケーションに優れた性能を提供します.
科学分野:
- 材料科学
- 化学工学
- 分離科学
背景:
- クセノン (Xe) とクリプトン (Kr) の分離は,それらの類似した物理的性質のために困難です.
- 高性能吸着剤は,効率的な産業用ガス分離に不可欠です.
研究 の 目的:
- 高効率のXE/Kr分離のための新しい吸着剤を開発する.
- 新しい金属有機フレームワーク (MOF) の吸収特性を調査する.
主な方法:
- 2つのホフマン型MOFの合成:Co (pyz) [Ni (CN) ] (ZJU-74a-Ni) とCo (pyz) [Pd (CN) ] (ZJU-74a-Pd)
- シングル・クリスタルX線微分法による特徴化.
- 環境条件でのガス吸附と選択性の測定
- Xe/Krのガスの混合物に関する画期的な実験
主要な成果:
- ZJU-74a-NiとZJU-74a-PdはXe吸収能力 (89.3と98.4cm3) とXe/Kr選択性 (74.1と103.4) を記録している.
- ZJU-74a-Ni内のユニークな"サンドイッチのような"結合部位はXEの親和性を高めます.
- ZJU-74a- Pdは突破性試験で高いXE吸収 (4. 63 mmol cm-3) とKr生産性 (214 cm3 g-1) を示した.
- 両方のMOFは頑丈で 放射線に耐性がある.
結論:
- 開発されたMOFはXE/Kr分離のための最先端の材料です.
- 独特の孔構造と金属の相互作用が 高い性能の鍵です
- これらの材料は,貴重ガス分離における産業用アプリケーションにとって有望である.
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