Reversible Methane Storage in a Polymer-Supported Semi-Clathrate Hydrate at Ambient Temperature and Pressure

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• 作者：Weixing Wang ; Benjamin O. Carter ; Christopher L. Bray ; Alexander Steiner ; John Bacsa ; James T. A. Jones ; Catherine Cropper ; Yaroslav Z. Khimyak ; Dave J. Adams ; Andrew I. Cooper
• 刊名：Chemistry of Materials
• 出版年：2009
• 出版时间：August 25, 2009
• 年：2009
• 卷：21
• 期：16
• 页码：3810-3815
• 全文大小：843K
• 年卷期：v.21,no.16(August 25, 2009)
• ISSN：1520-5002

文摘

A key issue regarding the use of clathrates and semi-clathrate hydrates for practical gas storage is the pressure−temperature stability of the material. For many practical applications, the avoidance of cooling, gas overpressure, and mechanical mixing would be very desirable. Here, we show that porous emulsion-templated polymer supports greatly enhance methane uptake kinetics in tetra-iso-amylammonium bromide semi-clathrate hydrates without introducing complex mixing technologies. These systems show unprecedented thermal stability and can be decomposed upon demand to release the gas. Single crystal X-ray structure analysis of the semi-clathrates loaded with methane or krypton were obtained, confirming that the gases are stored in the dodecahedral A′ and A′′ cages.