等容条件下H2O-CO2-CH4混合流体的高温拉曼光谱就位分析

陈晋阳; 郑海飞; 曾贻善; 孙樯

doi:10.11858/gywlxb.2003.01.002

等容条件下H2O-CO2-CH4混合流体的高温拉曼光谱就位分析

doi: 10.11858/gywlxb.2003.01.002

北京大学地质学系，北京 100871

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通讯作者:
陈晋阳

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出版历程
- 收稿日期: 2002-02-25
- 修回日期: 2002-04-18
- 发布日期: 2003-03-05

An in-Situ Raman Spectroscopy Study of Isochoric H2O-CO2-CH4 Fluids under High Temperature

Department of Geology, Peking University, Beijing 100871, China

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Corresponding author: CHEN Jin-Yang

摘要

摘要: 以合成包裹体作为腔体，用显微激光拉曼探针就位分析了H2O-CO2-CH4混合流体的高温特性。研究结果表明，在高温下，CH4和CO2相互之间对各自拉曼光谱的影响不大，水分子对它们的拉曼峰有比较大的影响。在等容条件下，流体均一前，随着温度的升高，水分子的氢键几乎呈线性减少，均一为气相的流体，水分子伸缩振动拉曼峰的变化与一般气体变化相似；随着温度升高，体系压力的增加，最大峰频率呈很微小的降低趋势。均一为液相的流体中的水分子，在均一温度时，氢键变化发生了转折，均一后流体中水分子的氢键受温度的影响比均一前明显要小，在测量的最高温度520 ℃，水分子存在着一定的氢键作用。一直到拉曼光谱测量的最高温度580 ℃还未均一的流体，液相中水分子存在比较强的氢键作用。
- 合成包裹体 /
- 等容 /
- 流体结构 /
- 高温 /
- 拉曼光谱 /
- 氢键
Abstract: The characteristics of the H2O-CO2-CH4 fluid at high temperature were studied by Raman spectroscopy. The results show that the Raman spectra of CH4 and CO2 do not influence each other, but they are both affected by H2O at high temperature. The hydrogen bonding of water decreases linearly before it becomes homogenous under isochoric condition. As the fluid becomes a homogenous gas, the Raman spectroscopy has little change with temperature. The hydrogen bonding of water, however, still remains in the homogenous liquid, even at the highest temperature of 520 ℃ in experiment. For the homogenous fluid at the highest temperature of 580 ℃ during measurement, the hydrogen bonding of liquid water remains relatively stronger.
- synthetic inclusion /
- isochoric /
- fluid structure /
- high temperature /
- Raman spectroscopy /
- hydrogen bonding

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