Effect of stress, concentration and temperature on gas diffusion coefficient of coal measured through a direct method and its model application

•Diffusion coefficients of coal were directly measured with stable concentration gradient.•The influence of stress on diffusion coefficient is much smaller than seepage.•The influence trend of gas pressure/concentration is different between adsorptive gas and non-adsorptive gas.•The diffusion model...

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Veröffentlicht in:	Fuel (Guildford) 2022-03, Vol.312, p.122991, Article 122991
Hauptverfasser:	An, Fenghua, Jia, Hongfu, Feng, Yao
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorptivity Coal Coefficient of variation Concentration gradient Desorption Diffusion coefficient Diffusion model Direct measurement method Gaseous diffusion Helium Measurement methods Oxidation Stress Stress concentration
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