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Fourier transform infrared spectrum measuring device for in-situ monitoring of chemical and chemical reaction

A technology of Fourier transform and infrared spectroscopy, applied in the field of instruments and meters, can solve the problems of slow heating rate, inconvenient reaction mechanism research, and many side reactions, and achieve the effects of fast temperature change rate, high modularization degree, and high integration

Pending Publication Date: 2022-03-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing Fourier transform infrared spectroscopy measurement devices for in-situ monitoring of chemical and chemical reactions mostly use resistance blocks instead of laser heating, and the temperature of the heating device is tested instead of the sample. The heating rate is slow, and there are many side reactions, which is inconvenient. To study the reaction mechanism
Liquid nitrogen rapid refrigeration can quickly freeze the reaction that occurs at a high speed, which can be used to study the reaction mechanism; the combination of laser heating and liquid nitrogen refrigeration with in-situ Fourier transform infrared spectroscopy measurement device has the advantage of rapid detection of changes in infrared spectroscopy during the reaction process , but no report

Method used

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  • Fourier transform infrared spectrum measuring device for in-situ monitoring of chemical and chemical reaction
  • Fourier transform infrared spectrum measuring device for in-situ monitoring of chemical and chemical reaction
  • Fourier transform infrared spectrum measuring device for in-situ monitoring of chemical and chemical reaction

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Experimental program
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Effect test

Embodiment 1

[0046] The experimental sample is an acidic molecular sieve. First, measure the infrared spectrum of the background environment. The general control 7-1 of the instrument controls the infrared light source 1 to emit infrared light, and controls the aperture 2 to a suitable size. The infrared light enters the beam splitter 3 after reflection and is divided into two beams. , enter the interferometer 4, control the movement of the moving mirror 4-2 of the interferometer, the infrared light enters the sample cell 5 without samples after interference, and the detector 6 collects light intensity data at different optical paths and feeds it back to the overall control of the instrument 7-1 , and then feed back to the computer 7-2 to perform Fourier transform on the optical path difference to obtain the infrared spectrum of the blank background, and deduct the influence of water vapor, carbon dioxide and other gases on the sample test; then measure the infrared sample of the acidic mole...

Embodiment 2

[0048] Test the linkage between the in-situ reaction cell and the laser heating module and the liquid nitrogen cooling module. image 3 It shows the temperature change and power change curve of the in-situ reaction pool laser heating module of this product. The laser heating starts at 2 minutes, and the power rises rapidly to 200W, which can quickly rise to 1000°C in a short period of time, and then maintain at a power of 150W. Constant temperature; Figure 4 It shows the temperature change and injection volume curve of the in-situ reaction pool liquid nitrogen cooling module of this product. Liquid nitrogen is injected at a constant speed, and the temperature drops rapidly to -180°C and remains at this temperature for a long time.

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Abstract

The invention relates to a Fourier transform infrared spectrum measurement device and method for in-situ monitoring of chemical and chemical reaction. Wherein infrared light emitted by the infrared light source sequentially passes through the diaphragm, the beam splitter, the interferometer and the sample cell and enters the detector; the data acquisition system serves as a master controller and is connected with the infrared light source, the diaphragm, a moving mirror in the interferometer, the sample pool and the detector; the measuring method comprises the following steps: setting the temperature of a reaction sample, wherein infrared light emitted by the infrared light source passes through the beam splitter and the interferometer and then penetrates through the sample; a moving mirror in the interferometer controls the optical path difference of the two beams of light separated by the beam splitter to form interference; the infrared light penetrating through the sample detects a light intensity signal through an infrared detector, the light intensity signal is fed back to a data acquisition system, and data is processed through Fourier transform to obtain an infrared spectrum of the sample. The in-situ monitoring device can be used in linkage with an in-situ reaction tank, the temperature is regulated and controlled in a laser heating and liquid nitrogen refrigeration mode, and the in-situ monitoring device is suitable for in-situ monitoring of chemistry and chemical engineering reactions.

Description

technical field [0001] The invention belongs to the field of instruments and meters, specifically a Fourier transform infrared spectrum measurement device and method for in-situ monitoring of chemical and chemical reactions, especially under the condition that the temperature of the sample can be adjusted, the infrared spectrum information of the sample can be observed in situ instruments and methods. Background technique [0002] Infrared spectroscopy belongs to molecular spectroscopy and is a powerful tool for determining molecular composition and structure. According to the intensity, position and shape of the absorption peak in the infrared spectrum of the unknown, it can be determined which groups are contained in the molecule of the unknown, and thus the structure of the unknown can be deduced. Infrared spectroscopy can be used for qualitative analysis, quantitative analysis, and analysis of unknown substances. Infrared spectroscopy has a wide range of applications. ...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N21/03
CPCG01N21/35G01N21/0332G01N2021/3595
Inventor 韩克利赵文远杨阳刘建勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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