Isothermal phase equilibria for the methane plus ethylene mixed gas hydrate system

被引：27

作者：

Sugahara, T ^{[1
]}

Makino, T ^{[1
]}

Ohgaki, K ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Chem Engn, Toyonaka, Osaka 5608531, Japan

来源：

FLUID PHASE EQUILIBRIA | 2003年 / 206卷 / 1-2期

关键词：

clathrate hydrate; solid-fluid equilibria; data; Raman spectroscopy; mixture; methane; ethylene;

D O I：

10.1016/S0378-3812(02)00313-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Isothermal phase equilibria for the methane + ethylene mixed gas hydrate system were investigated at 284 and 293 K by means of gas chromatography. In addition, the equilibrium composition in the mixed gas hydrate crystal was investigated at 293 K by means of Raman spectroscopy. At 293 K, the system exhibits behavior similar to an azeotrope as observed with vapor-liquid equilibria, with a pressure minimum point in the isothermal pressure-composition diagram. The results of Raman spectroscopic measurements reveal that the methane + ethylene mixed gas hydrate constructs the structure-I lattice in the whole composition range. This implies that solid phase transition from structure-I to -II, which is observed in the methane + ethane mixed hydrate system, for example, does not occur at 293 K in the methane + ethylene mixed hydrate system. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：117 / 126

页数：10

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