Thermodynamic study on the compositions of fluid phases in the C-O-H system under high temperature and pressure
被引:0
|
作者:
Bai Z.
论文数: 0引用数: 0
h-index: 0
机构:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, GuangzhouGuangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
Bai Z.
[1
]
Wang X.
论文数: 0引用数: 0
h-index: 0
机构:
Lanzhou Institute of Geology, Chinese Academy of Sciences, LanzhouGuangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
Wang X.
[2
]
机构:
[1] Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou
[2] Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou
来源:
Chinese Journal of Geochemistry
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1998年
/
17卷
/
2期
基金:
中国国家自然科学基金;
关键词:
fluid phase;
high temperature and high pressure;
thermodynamics;
nonbiogenesis;
natural gas;
D O I:
10.1007/BF03166831
中图分类号:
学科分类号:
摘要:
Based on the fluid phase equilibrium and the C-O-H system, the compositions of carious fluid phases under high temperatures and pressures have been calculated in terms of the available thermodynamic data and new P-V-T data and on the assumption of PT = ΣPi in this paper. The results indicate that in this system there are 5 major fluid phases in different proportions at various T and P. CH4 is the dominant phase (about 70%) under relatively lower T and P. Its proportion obviously decreases with increasing T, P and fO2. The results provide sufficient theoretical grounds for discussing the possibility of CH4 formation and the physical-chemical conditions of its stable occurrence and proportion in the geological environment.