Gas Storage in "Dry Water" and "Dry Gel" Clathrates
Gas Storage in "Dry Water" and "Dry Gel" Clathrates
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DOI：
10.1021/la903120p
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发表时间：
2010-03-02
期刊：
影响因子：
3.9
通讯作者：
Cooper, Andrew I.
中科院分区：
文献类型：
--
作者：
Carter, Benjamin O.;Wang, Weixing;Cooper, Andrew I.
“干水”(DW)是一种由水、疏水二氧化硅颗粒和空气高速混合而成的自由流动粉末。我们最近证明了DW可以显著提高甲烷气体水合物(MGH)的甲烷吸收速率。在这里，我们扩展了我们的初步工作，证明了DW可以用来增加甲烷以外气体(如CO(2)和Kr)的气体笼合物的形成动力学。我们还表明，通过加入凝胶剂形成“干凝胶”，可以提高体系的凝聚稳定性，从而显著提高材料的可回收性。例如，添加结冷胶可以在至少八个包合周期内有效重复使用，而不需要重新混合。DW及其“干凝胶”改性可能代表着一种潜在的平台，可用于在静态、未混合的系统中在实际时间尺度上进行可回收气体存储或气体分离。
"Dry water" (DW) is a Free-flowing powder prepared by mixing water, hydrophobic silica particles, and air at high speeds. We demonstrated recently that DW can be used to dramatically enhance methane uptake rates in methane gas hydrate (MGH). Here, we expand on our initial work, demonstrating that DW can be used to increase the kinetics of formation of gas clathrates for gases other than methane, such as CO(2) and Kr. We also show that the stability of the system toward coalescence can be increased via the inclusion of a gelling agent to form a "dry gel", thus dramatically improving the recyclability of the material. For example, the addition Of gellan gum allows effective reuse Over at least eight clathration cycles without the need for reblending. DW and its "dry gel" modification may represent a potential platform for recyclable gas storage or gas separation on a practicable time scale in a static, unmixed system.