立方体有孔座標ケージにおけるガス貯蔵の理解
Gregory R Lorzing, Aeri J Gosselin, Benjamin A Trump1
1Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 , United States.
Journal of the American Chemical Society
|July 5, 2019
まとめ
毛細な調整ケージはメタンの貯蔵の可能性を示しています. ニュートロン difraktionは,ガスの貯蔵アプリケーションのための彼らの適性を強調し,ケージ内の特定の吸収サイトを明らかにします.
科学分野:
- 材料科学
- 化学について
背景:
- 孔状の分子固体はガス貯蔵と分離に不可欠です
- これらの材料の最適化を妨げています.
- 調整ケージはガスの貯蔵に関する研究に 有望な基盤を提供している.
研究 の 目的:
- 同構造の調整ケージM24 ((tBu-bdc) のメタン貯蔵能力を調査する.
- ニュートロン散射を用いてメタンの吸附部位と相互作用を解明する.
- 高圧メタンの貯蔵のためのこれらの材料の可能性を評価する.
主な方法:
- M24 (tBu-bdc) 24の調整ケージの合成と特徴付け
- 関連するM24 ((Me-bdc) 24 ((dabco) 6フレームワークのニュートロン difraktions研究.
- 高圧メタンの吸収測定
- 吸収部位分析のための分子モデリング
主要な成果:
- 毛細なケージは1937m2/gのBET表面面積と143cm3 (STP) /cm3までのメタンの吸収を示しています.
- メタンの吸収エンタピーは -15から -22kJ/molです.
- ニュートロン difraktionは,ケージの窓内および外側の表面で特定の吸着部位を特定し,ケージごとに合計56の部位を特定しました.
結論:
- M24L24はメタンの貯蔵に有効な材料です.
- 吸収部位を理解することは,ガス貯蔵能力を最適化するための鍵です.
- リガンドの機能化は,抽出孔の空間と貯蔵性能をさらに高めることができます.
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