天然ガスの再利用のためのMOF膜の非対称な孔窓
Sheng Zhou1,2,3, Osama Shekhah1,2,3, Adrian Ramírez1,4,5
1Division of Physical Science and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
Nature
|June 22, 2022
まとめ
新しい金属有機フレームワーク (MOF) 膜は天然ガスから窒素を効果的に除去します. このイノベーションにより,メタンの浄化コストが大幅に削減され,エネルギー効率が向上します.
科学分野:
- 材料科学
- 化学工学
- 分離科学
背景:
- 天然ガスは高純度のメタンを原料として使用する必要があります.
- 窒素の除去は,加熱値に与える影響のために非常に重要です.
- 窒素をメタンから分離するのは 物理的性質が似ているため 難しい.
研究 の 目的:
- 天然ガスから窒素を取り除くためのエネルギー効率の高いプロセスを開発する.
- 選択的窒素浸透性を有する膜を設計する
- 新しい分離技術の経済的実行可能性を評価する.
主な方法:
- ミックスリンクアーメタル・オーガニック・フレーム (MOF) 膜 (Zr-fum67-mes33-fcu-MOF) の製造
- 不対称性を生み出すために 毛穴の形状を変更する.
- 高圧ガス浸透実験 (最大50バー)
- MOF膜を従来の方法と比較した技術経済分析
主要な成果:
- MOF膜は窒素に対して高い選択性を示した.
- 実用的な圧力の下で記録的な窒素の浸透度を達成した.
- 膜は窒素と二酸化炭素の両方を 効果的に除去しました
- テクノ・エコノミクスの分析では,コスト削減の可能性が大きいことが示された.
結論:
- 開発されたMOF膜は,天然ガスからの窒素除去に高度に選択的で浸透性のある溶液を提供します.
- この技術は,冷凍蒸留とアミンの洗浄に代わるコストを大幅に削減します.
- 効率的なメタンの浄化を実現するために 設計された孔構造は鍵です
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