Abstract
In this work, [Cu(INA)2] metal–organic framework (MOF) adsorbent has been used to recover methane from coal mine methane (CMM) using vacuum pressure swing adsorption process (VPSA). The adsorption capacity and separation performance were investigated at one bar and different temperatures (288 K, 298 K and 308 K) for methane, nitrogen and oxygen. The breakthrough curves of the single component and gas mixture were experimentally obtained through a dynamic fixed-bed experiment. Based on the LDF model, the mass transfer coefficient was investigated according to the experimental breakthrough curves. VPSA process was also developed using adsorption equilibrium and kinetics parameters to achieve the maximum recovery of methane. The VPSA operational parameters were optimized involving feed gas flow rate, adsorption time, adsorption pressure and evacuation pressure. The maximum 90% recovery of methane with 50% purity can be achieved.
Published Version
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