...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Chemical Physics >On the phase behaviors of hydrocarbon and noble gas clathrate hydrates: Dissociation pressures, phase diagram, occupancies, and equilibrium with aqueous solution
【24h】

On the phase behaviors of hydrocarbon and noble gas clathrate hydrates: Dissociation pressures, phase diagram, occupancies, and equilibrium with aqueous solution

机译：在烃类烃类和惰性气体包合物水合物的相行为：与水溶液的解离压力，相图，占用和平衡

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We apply a statistical mechanical theory on clathrate hydrates to an exploration of the phase behaviors of hydrocarbon and noble gas clathrate hydrates. Two- and three-phase coexisting conditions in the whole space of thermodynamic variables (temperature, pressure, and composition) are evaluated only from intermolecular interactions for water and guest species. The occupancy of guest molecules in various types of cages is also calculated. We find that a small difference in the guest size gives rise to a rich variety of phase behaviors, notably for the shape of the two-phase boundary and the occupancy. Ethane clathrate hydrate is found to exhibit the most drastic and intriguing features in various properties arising from its non-stoichiometry. We investigate the phase behaviors of clathrate hydrate in terms of the partial molar quantities derived from the chemical potentials of guest and water. Our method also allows exploring the aqueous solution of an apolar guest molecule in the low temperature and high pressure regime coexisting with the corresponding clathrate hydrate for which the free guest fluid phase is substituted at high temperatures. It is shown that the temperature dependence of methane solubility in liquid water in the presence of clathrate hydrate is opposite to that being in equilibrium with the methane fluid without clathrate hydrate. This phenomenon is elucidated by a substantial decrease in the chemical potential of methane from the hydrate/guest boundary to the hydrate/water. Published by AIP Publishing.
机译：我们在Clathrate水合物上应用统计机械理论，探索烃类和惰性气体包合物水合物的相位行为。在热力学变量（温度，压力和组成）的整个空间中的两个和三相共存条件仅从水和客销物种的分子间相互作用评估。还计算了各种类型的笼子中的客体分子的占用。我们发现客人大小的差异会产生丰富的相位行为，特别是为两相边界的形状和占用。发现乙烷包合物水合物在其非化学计量中出现的各种性质中表现出最激烈和有趣的特征。我们研究了衍生自客气和水化学势的部分摩尔量的包合物水合物的阶段行为。我们的方法还允许在低温和高压调节中探索具有相应包合物水合物的低温和高压调节的含水溶液，其中自由客剂流体相在高温下被取代。结果表明，在包合物水合物存在下甲烷溶解度在液体水中的温度依赖性与甲烷流体的平衡相反，没有包合物水合物。通过从水合物/客体边界到水合物/水的甲烷的化学潜力的实质性降低，阐明这种现象。通过AIP发布发布。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号