Abstract
A novel high pressure multi-component diffusion cell (HPMCDC) apparatus has been designed and built to measure single and binary gas diffusion, including co-current and counter-diffusion, from low to high pressures. The apparatus incorporates capability to investigate scale effects in solid coal specimens, up to 25 mm in diameter and 25 mm in thickness. Future experiments will be conducted to measure diffusion and counter-diffusion of CH4 and CO2 gases in solid coal, at various temperatures, pressures and for three distinct ranks of coal. The experiments will also address the frequent and controversial literature conclusions that the apparent-diffusion of CH4, inconsistent with gas diffusion theory.
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