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Gravimetric method gas adsorption testing device

A technology of gas adsorption and testing equipment, applied in the direction of using material absorption and weighing, etc., can solve the problem of low pressure, achieve the effect of shortening the test time and improving the test efficiency

Pending Publication Date: 2022-05-06
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the device used for gravimetric gas adsorption test in the prior art can test the low pressure, and provide a gravimetric gas adsorption test device

Method used

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  • Gravimetric method gas adsorption testing device
  • Gravimetric method gas adsorption testing device
  • Gravimetric method gas adsorption testing device

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Embodiment 1

[0051] This embodiment discloses a gravimetric gas adsorption test device, such as Figure 1-3 As shown, it includes a detection component, one end of the detection component has an inlet, and the detection component has a closed sample holding chamber, the sample holding chamber is used to place the sample to be tested, and the inlet is connected to the sample holding chamber cavity, the detection component is provided with a filter membrane, and the filter membrane is located between the inlet and the sample to be tested.

[0052] In this embodiment, the sample holding chamber is set to be airtight, and the test device can withstand a pressure of up to 200 Bar; by setting a filter membrane in the sample holding chamber, the sample to be tested is always in a stable and clean space, preventing the The sample to be tested is blown away by the high-pressure airflow during the air and air intake process. The test device is capable of high-pressure gas adsorption test, and compa...

Embodiment 2

[0067] refer to Figure 4 It should be understood that the sample compartment 10 of the gravimetric gas adsorption testing device of this embodiment is a hollow and elongated cylindrical structure, the interior of the sample compartment 10 forms a sample holding chamber, and the inlet is located on the left side of the sample holding chamber. By adopting the above-mentioned structural form, the effective volume of the sample holding chamber is greatly increased under the condition that the outer surface area is as small as possible.

[0068] There is a VCR joint 503 at the inlet, and the filter membrane is set inside the VCR joint 503, wherein the filter membrane is set inside the VCR joint 503, which can prevent the light sample to be tested from being brought to the position of other parts by the airflow during the inflation process Contaminate and affect test results.

[0069] The gravimetric gas adsorption testing device also includes a four-way joint 90, the first end of...

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Abstract

The invention discloses a gravimetric method gas adsorption testing device which comprises a detection assembly, one end of the detection assembly is provided with an inlet, the detection assembly is internally provided with a closed sample containing cavity, the sample containing cavity is used for placing a sample to be tested, the inlet is communicated with the sample containing cavity, the detection assembly is internally provided with a filter membrane, and the filter membrane is communicated with the sample containing cavity. The filter membrane is positioned between the inlet and the sample to be detected. The sample accommodating cavity is closed, and the testing device can bear the pressure as high as 200Bar; the filter membrane is arranged in the detection assembly, so that the to-be-detected sample is always located in a stable and clean space, and the to-be-detected sample is prevented from being blown away by high-pressure airflow in the deflation and air inlet processes. The testing device can be used for high-pressure gas adsorption testing, and compared with a volumetric method, the testing time of gas adsorption under high pressure is greatly shortened, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to the field of gravimetric adsorption testing, in particular to a gravimetric gas adsorption testing device. Background technique [0002] Atoms or molecules on the solid surface have surface (excess) free energy. When gas molecules come into contact with it, some of them will temporarily stay on the surface, so that the concentration of gas on the solid surface is greater than that in the gas phase. This phenomenon is called Adsorption phenomenon, physical adsorption is also called van der Waals adsorption, which is caused by the force between adsorbate and adsorbent molecules, and this force is also called van der Waals force. Since van der Waals forces exist between any two molecules, physical adsorption can occur on any solid surface. [0003] Devices for testing gas sorption generally use volumetric and gravimetric sorption tests. The volumetric method uses the Clapeyron equation to calculate the amount of gas adsorbed by ...

Claims

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Application Information

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IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 章跃标陶宇贺海龙
Owner SHANGHAI TECH UNIV
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