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Method and system for detecting adsorption capacity of solid sample to hydrogen-atom-containing gas

A technology of hydrogen atom and adsorption amount, which is applied in the direction of nuclear magnetic resonance analysis, etc., can solve the problems that the contribution of adsorption cannot be determined, the accuracy of measurement equipment is high, and there are many measurement equipment.

Active Publication Date: 2014-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has high requirements on the accuracy of the measuring equipment, involves many measuring equipment, and is complicated to operate, so the cost is relatively high
In addition, the above methods cannot determine the contribution of pores of different sizes in solid samples to the adsorption

Method used

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  • Method and system for detecting adsorption capacity of solid sample to hydrogen-atom-containing gas
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  • Method and system for detecting adsorption capacity of solid sample to hydrogen-atom-containing gas

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Embodiment 1, the system that detects the adsorption capacity of solid sample to methane

[0072] image 3 A system for detecting the amount of methane adsorbed by a solid sample is shown. Such as image 3 As shown, the system includes a nuclear magnetic resonance instrument 110, and the nuclear magnetic resonance instrument 110 includes a sample bottle 111 for containing a solid sample (such as coal, shale, etc.) to be tested. The system also includes a cylinder 1 for containing methane gas. The gas cylinder 1 communicates with the sample bottle 111 and is used for inputting methane gas into the sample bottle 111 . The outlet of the gas cylinder 1 is provided with a first pressure gauge 3 for controlling the amount of methane gas input into the sample bottle 111 , that is, controlling the methane pressure in the sample bottle 111 . In addition, a first pressure gauge 7 may also be provided on the pipeline at the outlet of the sample bottle 111 for detecting the met...

Embodiment 2

[0072] image 3 A system for detecting the amount of methane adsorbed by a solid sample is shown. Such as image 3 As shown, the system includes a nuclear magnetic resonance instrument 110, and the nuclear magnetic resonance instrument 110 includes a sample bottle 111 for containing a solid sample (such as coal, shale, etc.) to be tested. The system also includes a cylinder 1 for containing methane gas. The gas cylinder 1 communicates with the sample bottle 111 and is used for inputting methane gas into the sample bottle 111 . The outlet of the gas cylinder 1 is provided with a first pressure gauge 3 for controlling the amount of methane gas input into the sample bottle 111 , that is, controlling the methane pressure in the sample bottle 111 . In addition, a first pressure gauge 7 may also be provided on the pipeline at the outlet of the sample bottle 111 for detecting the methane pressure in the first pressure gauge 7 to more accurately control the methane pressure in the ...

Embodiment 3

[0079] Embodiment 3, the method for detecting the porosity of solid sample

[0080] This embodiment uses the system described above, and specifically includes the following steps.

[0081] (1) Use the same steps as in Example 2 to determine the constant A i and the constant B i .

[0082] (2) Open the second valve 6 and vacuum the sample bottle 111 with the vacuum pump 5 . Put the coal sample to be tested in the sample bottle 111 . Close the second valve 6 and open the first valve 4, and inject methane gas at a pressure of 1Mpa into the sample bottle 111. The nuclear magnetic resonance instrument 110 collects the adsorption nuclear magnetic resonance signal in the sample bottle 111 , and sends the adsorption nuclear magnetic resonance signal to the analysis device 120 . Based on the nuclear magnetic resonance signal of the coal sample to be tested, the analysis device 120 determines the signal area S of the adsorption nuclear magnetic resonance signal of the coal sample t...

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Abstract

The invention discloses a method for detecting the adsorption capacity of a solid sample to hydrogen-atom-containing gas. The method comprises the following steps: (1) collecting an adsorption nuclear magnetic resonance signal of the solid sample by using a nuclear magnetic resonance spectrometer; (2) determining the adsorption capacity of the solid sample to the hydrogen-atom-containing gas according to the adsorption nuclear magnetic resonance signal of the solid sample. The method disclosed by the invention is convenient to operate, simple in system, high in precision and low in cost, can be used for measuring the adsorption capacity of the solid sample to the hydrogen-atom-containing gas such as methane, so as to draw an adsorption-desorption curve, and can also be used for measuring contributions of different pores to adsorption / desorption so as to analyze the porosity characteristic of the solid sample. Correspondingly, the invention also provides a system for detecting the adsorption capacity of the solid sample to the hydrogen-atom-containing gas, a method for detecting the porosity of a solid and a method for drawing the adsorption-desorption curve of the solid sample to the hydrogen-atom-containing gas.

Description

technical field [0001] The present invention relates to the field of pore analysis of solid samples, in particular to a method and system for detecting the adsorption amount of a solid sample to a gas containing hydrogen atoms, a method for detecting pores of a solid sample, and drawing adsorption-desorption of a gas containing hydrogen atoms curve method. Background technique [0002] Porosity analysis of solids such as coal and shale can be performed by plotting the adsorption-desorption curve of the solid for methane gas. At present, the methods for drawing the adsorption-desorption curve of methane include volumetric method and gravimetric method. The volumetric method determines the volume of methane adsorbed by the sample to be tested by the pressure change in the sample bottle containing the sample to be tested, so as to draw the adsorption-desorption curve of methane according to the pressure and adsorption volume. The gravimetric method uses weighing devices such ...

Claims

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Application Information

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IPC IPC(8): G01N24/08
Inventor 胥蕊娜姜培学薛华庆
Owner TSINGHUA UNIV
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