Microscopic Equilibrium Determination for Structure-H (sH) Clathrate Hydrates at the Liquid-Liquid Interface: Krypton-Liquid Hydrocarbon-Water System

被引：11
作者：
Jin, Yusuke [1 ]
Kida, Masato [1 ]
Nagao, Jiro [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Methane Hydrate Res Ctr, Prod Technol Team, Toyohira Ku, Sapporo, Hokkaido 0628517, Japan
来源：
JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2012年 / 57卷 / 09期
关键词：
PHASE-EQUILIBRIUM; METHANE; STABILITY;
D O I：
10.1021/je300761q
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The dissociation temperature of clathrate hydrates in the krypton (Kr)-liquid hydrocarbon (methylcyclohexane, MCH and methylcyclopentane, MCP)-water systems was established in the temperature range of (273.2 to 285.6) K and pressure range of (0.5 to 2.4) MPa using optical scanning microscopy. From powder X-ray diffraction data, it was established that the clathrate hydrates formed in the Kr-MCH-water and Kr-MCP-water systems had the structure H (sH). The dissociation pressure-temperature (pT) conditions of the krypton-liquid hydrocarbon-water systems are milder than the pT conditions of Kr hydrate. Large guest molecules captured in the 5(12)6(8) cage affect the phase stability of the sH hydrate when compared to the phase-equilibrium data in the Kr-neohexane-water system.
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页码：2614 / 2618
页数：5
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