SUPERCRITICAL PHASE-SEPARATION IN H2O-N2 MIXTURES

被引：34

作者：

COSTANTINO, M

RICE, SF

机构：

[1] Department of Chemistry and Materials Science, L-369, Lawrence Livermore National Laboratory, Livermore

[2] Sandia National Laboratories, Livermore

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 23期

关键词：

D O I：

10.1021/j100176a004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report phase separation of supercritical mixtures of H2O and N2 at pressures to 2.1 GPa and temperatures to 830 K on the 75 mol% water isopleth. The composition is fixed by loading a diamond anvil cell with a known mixture at temperatures above 400-degrees-C and pressures above 150 MPa. We measure the pressure using the pressure dependence of the Sm3+:YAG fluorescence line at 6178 angstrom. The shape of the coexistence curve for this isopleth implies a critical curve with a relatively weak dependence of the phase separation pressure on the temperature.

引用

页码：9034 / 9036

页数：3

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