Phase equilibrium for structure-H hydrates at temperatures below the freezing point of water

被引：16

作者：

Ohmura, R ^{[1
]}

Matsuda, S ^{[1
]}

Uchida, T ^{[1
]}

Ebinuma, T ^{[1
]}

Narita, H ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Toyohira Ku, Sapporo, Hokkaido 0628517, Japan

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2005年 / 50卷 / 03期

关键词：

D O I：

10.1021/je0495381

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Four-phase (ice + structure-H hydrate + large-molecule guest substance liquid + methane-rich vapor) equilibrium pressure-temperature conditions were measured at temperatures from 252 K to 272 K in systems of water + methane + LMGS, where LMGS is a large-molecule guest substance for a structure-H hydrate. The tested LMGSs were 2,2-dimethylbutane (neohexane), methylcyclohexane, and tert-butyl methyl ether. The results obtained in the 2,2-dimethylbutane system agree with the corresponding data reported by Makogon et al., which were the only data set on the structure-H hydrate phase equilibrium at temperatures below the freezing point of water. Among the three systems studied, the lowest equilibrium pressure at a given temperature was observed in the 2,2-dimethylbutane system, and the highest, in the tert-butyl methyl ether system.

引用

页码：993 / 996

页数：4

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