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Gas adsorption and desorption test apparatus

A technology of adsorption and desorption and test equipment, which is applied in the direction of analyzing materials and instruments, can solve the problems of non-existing isothermal adsorption, etc., and achieve the effects of reducing free space, improving experimental efficiency, and maintaining constant temperature

Active Publication Date: 2013-04-10
HENAN POLYTECHNIC UNIV
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Problems solved by technology

However, there is no experimental device capable of isothermal adsorption and gas release

Method used

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  • Gas adsorption and desorption test apparatus

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Embodiment Construction

[0014] Such as figure 1 The shown gas adsorption and desorption test device includes an air charging system, a degassing system, a gas adsorption and desorption system and a temperature control system connected by pipelines.

[0015] The inflation system includes a high-pressure gas source 19 and a gas decompression valve 22 on the high-pressure gas source 19 . The high-pressure gas source 19 is a high-purity methane gas cylinder with a concentration of 99.999% and a pressure of 13.6Mpa produced by Beijing Hepu Gas Company. The gas pressure reducing valve 22 adjusts the gas to the pressure required for the experiment, so as to provide the gas adsorption and desorption system Provide constant pressure air source.

[0016] The degassing system includes a vacuum pump 15, a composite vacuum gauge 8, a vacuum gauge 12 and a vacuum piping system 13. A vacuum pumping control valve 14 is provided on the upper part of the vacuum piping system 13, and a control valve 23 is provided on ...

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Abstract

The invention relates to a gas adsorption and desorption test apparatus, which comprises an inflation system, a degassing system, a gas adsorption and desorption system and a temperature control system. The gas adsorption and desorption test apparatus with a simple structure is used for determining the adsorption constant and the ultimate gas desorption quantity of coal, can determine the parameters such as the quantity of lost gas, the drilling cuttings desorption index, the diffusion coefficient and the like under the conditions of different temperature, different pressure, different degree of metamorphism and different particle sizes, and is suitable for a test of particles of coal gas adsorption and desorption laws. The gas adsorption and desorption test apparatus can simulate the underground reservoir environment, can simultaneously conduct gas adsorption and desorption tests of four groups of different particle sizes of cuttings coal samples at different temperatures, can conduct isothermal adsorption tests and gas diffusion tests, and can directly determine the gas adsorption loss amount and the ultimate gas desorption quantity. The gas adsorption and desorption test apparatus can simultaneously conduct multiple groups of gas adsorption and diffusion tests and effectively increase the test efficiency, and the determining precision is high.

Description

technical field [0001] The invention belongs to the technical field of gas experiment devices, in particular to a gas adsorption and desorption test device. Background technique [0002] Coal bed gas content and gas pressure are key reservoir parameters to characterize the characteristics of coal bed methane reservoirs. Accurately obtaining coal bed gas content and gas pressure is of great significance for the exploration and development of coal bed methane resources and the prevention and control of coal mine gas disasters. According to the underground direct measurement method of coal seam gas content (GBT23250-2009) and the coal seam gas content measurement method during the geological exploration period (GB / T23249-2009), the coal seam gas content is equal to the sum of desorbed gas content, residual gas content and lost gas content . The desorbed gas content and residual gas content are directly measured through the desorption test; the lost gas content is the amount of...

Claims

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Application Information

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IPC IPC(8): G01N7/04
Inventor 魏建平王云刚李波鄢桂云吴松刚秦恒洁李盟
Owner HENAN POLYTECHNIC UNIV
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