Experimental study on isothermal desorption of methane from outburst-prone briquette

doi:10.16265/j.cnki.issn1003-3033.2017.07.021

Abstract

Abstract: In order to research characteristics of desorption of methane from outburst-prone coal, experiments were carried out on briquettes made of outburst-prone coal. Influence of the minimum equilibrium pressure on the adsorption constants during desorption experiment was analyzed. Reversibility of methane adsorption and desorption processes, the reasonable pressure conditions for gas isothermal desorption experiment and its data processing method were discussed. The results show that the minimum equilibrium pressure has a great influence on the fitting results of adsorption constants during desorption experiment, that the experiment processes are typically reversible, and there is a delay in the desorption process, that the isothermal desorption curves still obey Langmuir equation, and that to improve the reliability of the experiment results, the data on complete desorption state (desorption equilibrium pressure is 0 MPa and the residual adsorption is 0 mL/g) should be considered in firring, and the minimum equilibrium pressure for desorption experiment should not be higher than 0.51 MPa.

Key words: outburst-prone coal, briquette, isothermal desorption, reversibility, data processing, minimum equilibrium pressure

CLC Number:

X936

ZHANG Zunguo, CAO Shugang, HONG Lin, GUO Ping, ZHANG Yifu, QI Xiaohan. Experimental study on isothermal desorption of methane from outburst-prone briquette[J]. China Safety Science Journal, 2017, 27(7): 115-120.

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