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- W2393064488 abstract "Gas adsorption constants of coal samples are fundamental parameters for gas control and drainage in coal mines.The accuracy of these values plays an important role in gas content measurement and gas extraction.Even though the adsorption equilibrium time is defined in 7 hours by the standard of MT/T 752—1997,it is found that the most of coal samples cannot reach the state of adsorption equilibrium in 7 hours during the experimental work conducted.In order to understand the effect of adsorption time upon the value of gas adsorption constants,two gas adsorption constants,a and b were measured under different adsorption time for three different coal ranks.The result shows that the higher the coal rank,the higher the adsorption capacity and higher the value of gas adsorption constant a.The value of gas adsorption constant b presents the trend of decreasing with the increase of coal ranks under identical experimental conditions.In addition,with the increase of coal ranks,the gas adsorption constant a is more sensitive to adsorption time,which has prolonged adsorption equilibrium time.Therefore,when conducting the tests for gas adsorption constants,reasonable adsorption equilibrium time should be adjusted on the basis of a coal rank,particularly to these coal samples with a higher degree of metamorphism.For such coal samples,adsorption equilibrium time should be extended so as to enhance the reliability and accuracy of adsorption constant values measured" @default.
- W2393064488 created "2016-06-24" @default.
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- W2393064488 date "2013-01-01" @default.
- W2393064488 modified "2023-09-23" @default.
- W2393064488 title "Effect of adsorption equilibrium time on determination of gas adsorption constants" @default.
- W2393064488 hasPublicationYear "2013" @default.
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