Scholarlink

<p>Recently, various epoxy (oxirane) compounds have been identified as novel methane hydrate formers, and their hydrates’ structural and thermodynamic properties have been studied. However, most epoxy compounds reported, thus far, are relatively small molecules that form structure-II (sII) hydrates. This study demonstrates that two epoxy compounds, 1,2-epoxycyclooctane and 1,2,5,6-diepoxycyclooctane, which have cyclooctane backbones with one and two epoxy groups, respectively, can form structure-H (sH) hydrates with CH<sub>4</sub> help gas and serve as thermodynamic promoters of CH<sub>4</sub> hydrates. Crystallographic, spectroscopic, and phase equilibrium analyses indicate that the epoxy group of LGM has minimal effect on the composition of CH<sub>4</sub> hydrates (i.e., CH<sub>4</sub> storage) but significantly influences equilibrium conditions. The moderate hydrophilicity induced by the epoxy group significantly enhances the thermodynamic stability of the CH<sub>4</sub> hydrates. These findings suggest that epoxy compounds have potential as thermodynamic promoters in various hydrate-based technologies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structure-H Type Hydrates Containing Cyclooctane-Based Epoxy (Oxirane) Compounds

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年1月13日

查看全文
  • Jiwoong Seol

摘要

Recently, various epoxy (oxirane) compounds have been identified as novel methane hydrate formers, and their hydrates’ structural and thermodynamic properties have been studied. However, most epoxy compounds reported, thus far, are relatively small molecules that form structure-II (sII) hydrates. This study demonstrates that two epoxy compounds, 1,2-epoxycyclooctane and 1,2,5,6-diepoxycyclooctane, which have cyclooctane backbones with one and two epoxy groups, respectively, can form structure-H (sH) hydrates with CH4 help gas and serve as thermodynamic promoters of CH4 hydrates. Crystallographic, spectroscopic, and phase equilibrium analyses indicate that the epoxy group of LGM has minimal effect on the composition of CH4 hydrates (i.e., CH4 storage) but significantly influences equilibrium conditions. The moderate hydrophilicity induced by the epoxy group significantly enhances the thermodynamic stability of the CH4 hydrates. These findings suggest that epoxy compounds have potential as thermodynamic promoters in various hydrate-based technologies.