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Device and method for measuring supercritical carbon dioxide solubility performance based on micro visibility technology

A carbon dioxide and measuring device technology, which is applied to measuring devices, material analysis through optical means, instruments, etc., can solve the problems of difficulty in keeping the temperature of the circulation pipeline consistent, difficulty in accurately judging the equilibrium state, and large consumption of supercritical carbon dioxide. The effect of shortening the test time, reducing the cost of the experiment, and small sample volume

Active Publication Date: 2015-07-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN2715835 is such a method, but this type of device largely relies on the naked eye to identify whether there is a cloud point, the error is large, and the equilibration time is long, which limits its application
Chinese patent CN103512826 is exactly this kind of method, the shortcoming of this kind of method is that it is difficult to accurately judge whether the two have really reached equilibrium, and the consumption of supercritical carbon dioxide is relatively large
Chinese patent CN1975381 is such a method. The disadvantage of this method is that it is difficult to keep the temperature of the entire circulation pipeline consistent. In the circulation pipeline, the phase balance is constantly broken due to temperature changes, which may cause the chemical agent to change from supercritical carbon dioxide Condensation and precipitation in the middle will cause measurement errors

Method used

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  • Device and method for measuring supercritical carbon dioxide solubility performance based on micro visibility technology
  • Device and method for measuring supercritical carbon dioxide solubility performance based on micro visibility technology
  • Device and method for measuring supercritical carbon dioxide solubility performance based on micro visibility technology

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Embodiment 1

[0065] A device for measuring the solubility of supercritical carbon dioxide based on microscopic visualization technology, including a pressure-resistant holder, a temperature control system, a microscopically etched glass model, an ultrasonic disperser29, and a microscope image acquisition and analysis system;

[0066] The pressure-resistant holder is used to clamp the microscopic etched glass model, and simulate the formation pressure through liquid pressure regulation outside the microscopic etched glass model;

[0067] The temperature control system is used to adjust the working temperature of the device;

[0068] The microscopic etched glass model includes a transparent cavity for guiding flow and bearing pressure, an outlet and an inlet, and the outlet and the inlet are all set downward;

[0069] The ultrasonic disperser 29 dissolves carbon dioxide in the sample to be tested entering the transparent cavity;

[0070]The microscope image acquisition and analysis system i...

Embodiment 2

[0072] A kind of supercritical carbon dioxide solubility measuring device based on microscopic visualization technology as described in Example 1, its difference is that the pressure-resistant holder includes a top cover 12, a bottom cover 31 and a middle tank 22;

[0073] Wherein: the middle tank 22 is used to place the microscopic etched glass model and the ultrasonic disperser 29 connected thereto; the top of the middle tank 22 uses a stainless steel ring to fasten the microscopic etched glass model in the middle tank 22 by means of countersunk screws;

[0074] The top cover 12 and the bottom cover 31 are respectively fixed with sapphire glass 20 and sapphire glass 30 . The high light transmittance and pressure resistance of the sapphire glass are used to realize the visual observation of the entire dissolution process under high pressure conditions, and the top cover and the bottom cover are connected to the middle groove with hexagonal nuts; in order to ensure the tightnes...

Embodiment 3

[0079] A kind of supercritical carbon dioxide solubility measuring device based on microscopic visual technology as described in embodiment 1, 2, its difference is, the preparation method of the transparent cavity of described microscopically etched glass model is as follows:

[0080] Adopt transparent plexiglass, utilize existing photoetching technology, etch out a cuboid groove 43 on the inner surface of two pieces of plexiglass sheets of the same size, and etch a pair of opposite corners of the cuboid groove 43 The two ends of the diversion path are the inlet and outlet of the etched plexiglass sheet, and then the above two plexiglass sheets are glued together. The two pieces of transparent plexiglass are fused together, and are 80mm long x 80mm wide x 10mm thick. A cuboid groove 43 with a length of 50mm x width 50mm x 3mm thick is etched inside. The injection line 44 in the flow guide channel and the discharge line 45 in the flow guide channel are etched at the corners. I...

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Abstract

The invention provides a device for measuring supercritical carbon dioxide solubility performance based on a micro visibility technology. The device comprises a pressure-proof clamper, a temperature control system, a micro etching glass model, an ultrasonic dispersion instrument and a microscope image acquisition analysis system, wherein the pressure-proof clamper is used for clamping the micro etching glass model and regulating the pressure through liquid outside the micro etching glass model so as to simulate the formation pressure; the temperature control system is used for regulating the working temperature of the device; the micro etching glass model comprises a pressure-bearing and transparent diversion cavity, an outlet and an inlet; the outlet and the inlet are formed downwards; the ultrasonic dispersion instrument dissolves carbon dioxide in a to-be-tested sample which enters into the transparent cavity; the microscope image acquisition analysis system comprises a microscope camera and an image acquisition analysis system; the microscope camera is capable of acquiring the solubility parameter of the to-be-tested sample in supercritical carbon dioxide by virtue of the transparent cavity.

Description

technical field [0001] The invention relates to a device and method for measuring the solubility of supercritical carbon dioxide based on microscopic visualization technology, and belongs to the technical field of supercritical fluids. Background technique [0002] In recent years, with the strengthening of people's awareness of environmental protection, the unique physical and chemical properties of supercritical fluids have aroused great interest in the field of green chemistry. Supercritical carbon dioxide refers to the temperature and pressure above its critical value (T c =31.1°C, P c =7.39MPa) carbon dioxide fluid. Compared with other supercritical fluids, supercritical carbon dioxide conditions are easy to achieve, which is conducive to meeting the requirements of the environment, equipment manufacturing, and economy, and has attracted much attention. [0003] Supercritical carbon dioxide fluid is a high-density gas. In terms of physical properties, it has dual ch...

Claims

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Application Information

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IPC IPC(8): G01N21/84
Inventor 李兆敏张超鹿腾王飞刘己全董全伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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