安定した低圧水素クラスターは,バイナリクラトラート水合物の中に貯蔵されている
Louw J Florusse1, Cor J Peters, Joop Schoonman
1Faculty of Applied Sciences, Department of Chemical Technology, Physical Chemistry and Molecular Thermodynamics, Delft Institute for Sustainable Energy; Delft University of Technology, Julianalaan 136, 2628 BL Delft, Netherlands.
まとめ
安定した水素貯蔵は,sII二次クラスラート水素を用いて達成される. テトラヒドロフーランはケージを共占し,水素 (H2) クラスラート形成に必要な圧力を大幅に低下させます.
科学分野:
- マテリアルサイエンス 材料科学
- 化学工学は化学工学というものです.
- 物理化学 物理化学
背景:
- 水素 (H2) クラトラート水素は,ガス貯蔵のための潜在的な媒介である.
- 純粋なH2クラスラートを形成するには,通常,高圧が必要であり,これは実用的な応用を制限しています.
- ゲスト分子によるクラスラート構造の安定化は,それらの性質を修正する既知の戦略である.
研究 の 目的:
- バイナリ系を用いて水素クラトラート水素の安定化を調査する.
- 低圧で水素を貯蔵する可能性を判断する.
- H2を占有するクラスラートケージの構造と安定性を特徴付ける.
主な方法:
- 熱力学的測定は熱力学的な測定である.
- X線微分分析によるX線微分分析
- ラーマン光譜法 (Raman spectroscopy) が使われています.
- 核磁共振 (NMR) スペクトロスコーピーは,核磁共振 (NMR) スペクトロスコーピーを用いて行われます.
主要な成果:
- H2分子のクラスターは,sIIクラトラート水合物の小さな檻の中で安定させられた.
- テトラヒドロフラン (THF) 分子は単独で大きなケージを占有し,安定させる共同ゲストとして作用した.
- バイナリークラスレートシステムは,純粋なH2水素 (300MPa,280K) と比較して,かなり低い圧力 (5MPa,279.6K) でH2を貯蔵することを可能にした.
結論:
- バイナリクラトラート水素は,低圧水素貯蔵のための有望な経路を提供します.
- H2とTHFによるケージの共占は,クラトラート構造を効果的に安定させます.
- この発見は,効率的で安全な水素貯蔵技術の開発に影響を及ぼします.
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