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http://dx.doi.org/10.7842/kigas.2013.17.2.36

The Analysis of ECBM Efficiency about Sorption Rate between CH4 and CO2  

Kim, Kihong (Dept. of Natural Resource and Environmental Engineering, Hanyang University)
Sung, Wonmo (Dept. of Natural Resource and Environmental Engineering, Hanyang University)
Han, Jeongmin (Dept. of Natural Resource and Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korean Institute of Gas / v.17, no.2, 2013 , pp. 36-43 More about this Journal
Abstract
In order to asses gas production behavior for $CO_2$ ECBM, the sorption charcteristics on coal are considered to be a key factor. In this study, we have investigated the change of the sorption rate of adsorbed gas as a function of pressure and temperature below the appropriate depth for $CO_2$-ECBM. The experiment were carried out under four different temperatures varying from $15^{\circ}C$ to $45^{\circ}C$, while the coal pressure was varied from atmosphere to 1,400 psi for every temperature. From this results, the sorption rate both $CO_2$ and $CH_4$ increased with increasing the coal pressure. Otherwise, the sorption rate both $CH_4$ and $CO_2$ decreased linearly as the coal temperature increased. From the sensitivity studies on pressure and temperature change, it was experimentally identified that $CO_2$ sequestration rate and $CH_4$ production rate are better at deeper depths below a depth of 800 m in coal seams. However, the results showed continued decline in the increasing ratio of ECBM with formation depth.
Keywords
ECBM; sorption rate; experiment; depth; efficiency;
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