A Method and System for Evaluating the Gas Diffusion Capacity of Coal Micropores under Competitive Adsorption
A technology of competitive adsorption and gas diffusion, applied in diffusion analysis, suspension and porous material analysis, instruments, etc.
Active Publication Date: 2022-04-26
CHINA UNIV OF MINING & TECH (BEIJING)
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[0005] The purpose of this application is to provide a method and system for evaluating the gas diffusion capacity of coal micropores under competitive adsorption, so as to solve or alleviate the problems in the above-mentioned prior art
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[0048] The present application will be described in detail below with reference to the accompanying drawings and embodiments. Each example is provided by way of explanation of the application, not limitation of the application. In fact, those skilled in the art will recognize that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Accordingly, it is intended that the present application cover such modifications and variations as come within the scope of the appended claims and their equivalents.
[0049] Existing research focuses on the adsorption and migration of single-component gases, following the classic Fick’s diffusion law, but the amount of gas adsorption predicted according to the diffusion coefficient deviates greatly from the experimental result...
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This application relates to the technical field of testing or analyzing materials by means of measuring their chemical or physical properties, and provides a method and system for evaluating the gas diffusion capacity of coal microchannels under competitive adsorption. The method includes: obtaining the time-varying curve of the cumulative gas adsorption capacity of each component gas in the coal particle mixture gas; establishing a certain component gas in the coal particle mixture gas according to the Langmuir isotherm adsorption equation and the law of mass conservation of the mixture gas Dimensional model of radial flow; according to the preset dimensionless parameters of coal particles, the dimensional model of the radial flow of the component in the coal particle mixture gas is transformed into the radial flow of the component gas Dimensionless model; according to the dimensionless model of the component flowing in the radial direction, the dimensionless cumulative adsorption capacity of the component in the coal particle mixture gas is obtained; the dimensionless cumulative adsorption capacity curve of the component gas is transformed For the dimensional cumulative adsorption capacity curve, the inversion calculation obtains the micropore diffusion coefficient of the component gas in the coal particle mixture gas.
Description
technical field [0001] This application relates to the technical field of testing or analyzing materials by means of measuring their chemical or physical properties, in particular to a method and system for evaluating the gas diffusion capacity of coal micropores under competitive adsorption. Background technique [0002] Coal is widely used as a main fossil fuel in my country. Due to the continuous reduction of shallow coal resources, the mining level continues to extend to the deep during the actual mining process, resulting in the increasing intensity and frequency of gas accidents, which not only poses a threat to the country and Coal mining enterprises have brought huge losses, and have also brought great harm to the life safety of coal miners. [0003] Gas is also called coal bed gas. As an associated resource of coal, it is not only a major source of danger for coal mine safety production, but also a green and clean energy source. The scientific and effective extracti...
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IPC IPC(8): G01N13/00G01N15/08G06F30/23
CPCG01N13/00G01N15/08G06F30/23G01N2013/003
Inventor 刘伟褚翔宇张凤杰韩冬阳祁明辉毋凡徐浩王猛李浩然白财金
Owner CHINA UNIV OF MINING & TECH (BEIJING)