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首页> 外文会议>International Workshop on Water Dynamics >OH stretching vibration changes of water at water-rock interface under high temperatures and pressures: An in-situ study using infrared spectroscopy
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OH stretching vibration changes of water at water-rock interface under high temperatures and pressures: An in-situ study using infrared spectroscopy

机译：高温下水岩界面延伸水的振动变化：红外光谱法的原位研究

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摘要

In order to investigate effects of molecular behavior of interfacial water on rock surface, high temperature-pressure cell (up to 400 degrees C and 50 MPa) was developed to measure infrared (IR) and Raman spectra, which was attached with optical microscopy, therefore, in situ and microscopic measurements were enable at high temperature and pressure (HT & BP) conditions. IR spectra of water on metal, interfacial water on quartz surface and synthetic quartz solution were measured. As a result of IR spectroscopic measurements of water on metal, the broad peak at ca. 3400 cm(-1), attributed to OH stretching vibration of water molecules, was observed at high temperature and pressure conditions. Continuous shift of the OH vibration mode was obtained from room to hydrothermal conditions. Compared with the result of IR properties of water on a metal, IR properties of water on a quartz surface exhibit different trend: the peak position shifted to higher wavenumber with increasing temperature and slightly shifted with pressure. IR property of water was changed by environmental conditions such as temperature, pressure and substrate. Molecular structure of interfacial water on the rock and rock-forming mineral at elevated temperatures and pressures were not only changes due to physical conditions such as temperature and pressure but also interaction between water and solid rock materials.
机译：为了研究界面上界面水的分子行为的影响，开发出高温压力池（高达400℃和50MPa）以测量用光学显微镜连接的红外（IR）和拉曼光谱，因此，原位和微观测量在高温和压力（HT＆BP）条件下能够实现。测量金属上的水的IR光谱，石英表面和合成石英溶液上的界面水。由于金属对水的IR光谱测量，宽峰在CA.在高温和压力条件下观察到水分子的OH拉伸振动的3400cm（-1）。 OH振动模式的连续偏移是从水热条件的空间获得的。与金属水的IR属性的结果相比，石英表面上的水的IR属性表现出不同的趋势：峰值位置随着温度的增加而越来越大而略微移位。环境条件如温度，压力和基材等环境条件改变了水。在升高的温度和压力下岩石和岩石形成矿物质上的界面水的分子结构不仅因温度和压力等物理条件而变化，而且在水和固体岩石材料之间相互作用而变化。

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