Origin of anomalously stabilizing ice layers on methane gas hydrates near rock surface
Origin of anomalously stabilizing ice layers on methane gas hydrates near rock surface
复制标题
岩石表面附近甲烷气体水合物异常稳定冰层的起源
DOI：
10.1039/d2cp04883c
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发表时间：
2023
影响因子：
3.3
通讯作者：
Boström, Mathias
中科院分区：
文献类型：
--
作者：
Li, Yang;Corkery, Robert W.;Carretero-Palacios, Sol;Berland, Kristian;Esteso, Victoria;Fiedler, Johannes;Milton, Kimball A.;Brevik, Iver;Boström, Mathias
在接近冰点温度的水中，气体水合物（GH）可以通过形成冰层而稳定。在最近的一项工作中[Bostrom等人，太空人。太空人，A54，650，2021]，发现具有部分气体稀释的表面区域对于获得纳米至微米尺寸的非稳定冰层可能是必要的。在本文中，它表明，在多层系统中的Casimir Lifshitz自由能可以诱导更薄，但更稳定，在空腔中的冰层比那些发现在一个大型水库的冷水中的气体水合物。在充满冷水的孔隙中，这种冰层的厚度和稳定性会影响气体分子的泄漏。额外的贡献，例如盐引起的应力，也可以是重要的，并简要讨论。
Gas hydrates (GHs) in water close to freezing temperatures can be stabilised via the formation of ice layers. In a recent work [Boström et al., Astron. Astrophys., A54, 650, 2021], it was found that a surface region with partial gas dilution could be essential for obtaining nano- to micron-sized anomalously stabilizing ice layers. In this paper, it is demonstrated that the Casimir–Lifshitz free energy in multi-layer systems could induce thinner, but more stable, ice layers in cavities than those found for gas hydrates in a large reservoir of cold water. The thickness and stability of such ice layers in a pore filled with cold water could influence the leakage of gas molecules. Additional contributions, e.g. from salt-induced stresses, can also be of importance, and are briefly discussed.