High-pressure temperature control experiment device for micro laser-Raman spectrum

Abstract

The invention relates to an experiment device, in particular to a high-pressure temperature control experiment device for a micro laser-Raman spectrum, comprising an air supply device, a pressure sensor, a temperature sensor, a reaction kettle, a data acquisition unit and a control unit, wherein the air supply unit is connected with the reaction kettle through the pressure sensor; the temperature sensor is arranged on the reaction kettle; and the pressure sensor and the temperature sensor are respectively connected with the data acquisition unit which is connected with the control unit. The high-pressure temperature control experiment device takes a small-sized high-pressure reaction kettle as a core, is suitable for the in situ observation of the micro laser-Raman spectrum, can control the temperature and the pressure, can be used for in situ observation of hydrates of depositions in different types and overcomes the defects of the current existing device.

Description

technical field [0001] The invention relates to an experimental device, in particular to a high-pressure temperature-control experimental device for micro-laser Raman spectroscopy. Background technique [0002] Microscopic laser Raman spectroscopy is an advanced microscopic analysis method, which is widely used in the study of material structures in materials, archaeology, and geological inclusions. At present, microscopic laser Raman spectroscopy has been successfully applied to the structure determination of gas hydrates. [0003] Since natural gas hydrate is a product under low temperature and high pressure, it is very unstable at room temperature and easily decomposed. Therefore, when using large-scale instruments such as microscopic laser Raman spectroscopy to determine its structure, it must be ensured that the hydrate will not decompose during the experimental determination. Typically, very low temperatures (-120°C) are required at atmospheric pressure. In addition...

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Problems solved by technology

However, since it cannot control the pressure (only under normal pressure), it can only measure one state of hydrate, and cannot perform in-situ monitoring of hydrate formation and decomposition process

High-pressure capillary quartz tubes can be used for in-situ observation, but since the inner diameter of capillary quartz tubes is only tens of microns, it is difficult to exchange gas and liquid, and it is difficult to observe hydrates in sediments, and the pressure can only be added at one time, which is cumbersome to operate

At present, there are also diamond reactors, the pressure can be as high as hundreds of MPa, but the temperature is difficult to control, and the volume is also small, expensive, and has great limitations.

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