Akademik Veri Yönetim Sistemi
SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI, cilt.28, sa.1, ss.49-65, 2010 (ESCI)
Methane released from coal mines is an effective greenhouse gas in addition to its flammability even at lower concentrations (5-15%). Drainage of the methane being available at coal seam/ seams is possible by using conventional methods prior to, during and after the mining. Drained methane may be utilized for various purposes depending on its concentration. Low amount of methane that can't be produced by drainage methods, is released into atmosphere from mine exhaust as diluted by mine ventilation. The methane released into atmosphere via mine exhaust, constitutes globally approximately 60-70% of the methane emissions from underground coal mining although it has low concentrations. In recent years, attempts enabling the utilization of low concentration methane released into atmosphere have gradually increased. These studies focused on the oxidation of the methane are based on the use of the captured ventilation air as the principle or auxiliary fuel. CO2 and heat released from the oxidation of methane, can also be utilized to produce energy, if meets the demands. In this study, an assessment of mitigation and utilization technologies of low concentration methane released into atmosphere from mine exhaust is presented. Additionally, a comparison of the technologies is given from various aspects and some applications are mentioned.