Effect of montmorillonite on hydrate-based methane separation from mine gas
Journal of Central South University(2018)
Abstract
Three types of mine gas samples were used in the solutions of tetrahydrofuran (THF), sodium dodecyl sulfate (SDS) and THF-SDS with/without MMT respectively to investigate the effect of montmorillonite (MMT) on separation characteristics of methane recovered from mine gas based on hydrate method. The partition coefficient, separation factor and recovery rate were used to evaluate the effects of MMT, and the selection factor was primarily proposed to define the selectivity of mine gas hydrate in the relative target gases. The experimental results indicate that MMT could improve the following factors including hydration separation factor, the selection factor, the partition coefficient, and the recovery rate. Furthermore, the effect of SDS on the function of MMT is analyzed in the process of hydration separation. Finally, due to the results of the experiment, it is concluded that MMT hydration mechanism explores the effect of MMT enrichment methane from mine gas.
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Key words
mine gas,hydrate,montmorillonite,separation effect,partition coefficient,separation factor,recovery rate,selection factor
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