Supercritical carbon dioxide phase balancing apparatus and use method thereof

A technology of carbon dioxide and phase balance, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of large visible window area, difficult to ensure sealing, and high requirements, so as to improve the efficiency of experimental testing, reduce experimental errors, and operate Convenient and fast effect

Inactive Publication Date: 2016-08-17
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an apparatus for studying properties such as phase behavior (phase separation), concentration changes over time without affecting their quality. By measuring these quantities accurately with this technique, researchers have been able to better interpret how different materials behave differently at certain temperatures. Additionally, it provides technical means for analyzing multi-ratio mixtures containing various components like plasticizers.

Problems solved by technology

Technological Problem addressed in this patents relates to current techniques such as extractive analysis and testing devices for determining properties like specific types of compounds present within fluids. These conventional technologies require expensive instruments and involve complicated procedures involving complex processes. There is an urgent technical problem being solved through new approaches called supersymetry.

Method used

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  • Supercritical carbon dioxide phase balancing apparatus and use method thereof
  • Supercritical carbon dioxide phase balancing apparatus and use method thereof
  • Supercritical carbon dioxide phase balancing apparatus and use method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0069] Add 1 g of polymethyl methacrylate to the phase balance measuring device 1, fill the upper part of the second intermediate container 6 with acetic acid, transfer the carbon dioxide in the storage tank 4 to the phase balance measuring device 1, and use the formula ① to obtain the added carbon dioxide The mass of acetic acid is 100g, and the acetic acid in the second intermediate container 6 is added to the phase balance measuring device 1, and the mass of the added acetic acid is obtained by formula ② as 5g. Measure the phase behavior of the medium in the phase balance measuring device 1, use the formula 3. to obtain the density of the system under the cloud point pressure, and draw the supercritical carbon dioxide-acetic acid-polymethyl methacrylate system (three kinds of material mass ratio 100:5: 1) The cloud point pressure and density change curve with temperature, such as image 3 shown.

Embodiment 2

[0071]Keep the experimental condition of embodiment 1, repeat step (8), continue to join the acetic acid in the second intermediate container 6 in the phase balance measuring device 1, utilize formula 2. the quality that obtains the acetic acid that adds for the second time is 5g (in the system The total mass of acetic acid is 10g). Repeat step (9), measure the phase behavior of the medium in the phase balance measuring device 1, utilize formula 3. to obtain the density of the system at the cloud point pressure, draw the supercritical carbon dioxide-acetic acid-polymethyl methacrylate system (three kinds of substances Mass ratio 100:10:1) cloud point pressure and density change curve with temperature, such as Figure 4 shown.

Embodiment 3

[0073] Keep the experimental conditions of Example 2, repeat step (7), continue to add the carbon dioxide in the storage tank 4 in the phase balance measuring device 1, utilize the formula 1. to obtain the quality of the carbon dioxide added for the second time to be 50g (total carbon dioxide in the system Mass is 150g). Repeat step (9), measure the phase behavior of the medium in the phase balance measuring device 1, utilize formula 3. to obtain the density of the system at the cloud point pressure, draw the supercritical carbon dioxide-acetic acid-polymethyl methacrylate system (three kinds of substances Mass ratio 150:10:1) cloud point pressure and density change curve with temperature, such as Figure 5 shown.

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Abstract

The invention discloses a supercritical carbon dioxide phase balancing apparatus. The supercritical carbon dioxide phase balancing apparatus comprises a phase balance measuring device, a carbon dioxide gas source, a first middle container, a storage tank, a balance, a second middle container, a six-way valve, a water storage tank, a pump, a first pressure meter, a second pressure meter, a third pressure meter, a fourth pressure meter and a safety valve. The invention also discloses a use method of the supercritical carbon dioxide phase balancing apparatus. The phase behavior and the density of a system are evaluated by adopting a cloud point pressure curve technology, so the influence of polymer swelling on an experiment result in the extraction technology measurement process is avoided. Carbon dioxide or a liquid to be detected is continuously added through the middle containers under a constant pressure at a constant temperature in the experiment process to realize continuous determination of the phase behavior and the density of same components and various ratios and avoid measurement result inaccuracy caused by repeated dismounting of devices and measurement condition disunity caused by addition of a medium to be measured of routine measurement methods.

Description

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Claims

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Application Information

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Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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