Characterization of a subsurface coal bed methanogenic culture and its role in coalbed methane recovery and CO2 utilization

Characterization of Anthracite-Degrading Methanogenic Microflora Enriched from Qinshui Basin in China

“…The results suggest that the microflora was able to survive salinity as high as 2%. In another study, similar phenomenon was observed for the degradation of bituminous coal by thermophilic bacteria with an upper limit of 4% salinity …”

“…In another study, similar phenomenon was observed for the degradation of bituminous coal by thermophilic bacteria with an upper limit of 4% salinity. 43 Five different coal particle size ranges were used to evaluate their effect on the yield and rate of methane production. The results showed that there were two groupings with respect to the methane yield (Figure 2c), one in the range of less than 0.15 mm (0.075−0.15 mm and <0.075 mm) producing approximately 240 μmol of methane/g of coal and another in the range of more than 0.15 mm (0.425−0.85 mm, 0.25− 0.425 mm, and 0.15−0.25 mm) producing approximately 205 μmol/g of coal.…”

Microbial Methane Potential for the South Sumatra Basin Coal: Formation Water Screening and Coal Substrate Bioavailability

“…As significant methane was produced by the SSB2 cultures when grown on both H 2 -CO 2 and acetate, it is also possible that the high water salinity provided unfavorable conditions for the growth of coal degrader bacteria, whereas the methanogen population seemed to be unaffected. It has been previously proposed that salinity affects the growth of consortia with the ability to convert coal to methane [2,24]. The negative number of net methane yield in SSB2 coal treated culture may also indicate microbial methane oxidation.…”

Modeling Framework for Biogenic Methane Formation from Coal

“…In others, low levels of permeability in the coal bed, resulting in there being no migration path or a low reservoir pressure, prevents gas from reaching production wells. Some of these problems can be overcome with the use of methanogenic microbial communities . Since there is disagreement within the scientific community about whether CBM results from coal breakdown at elevated temperatures (thermogenic coal gasification), coal bed methane capture, or from the concerted activity of methanogenic communities in the coal bed (biogenic methane), the degradation process that coal undergoes is not well understood. , While subsurface methane can accumulate through any of these methods, this study is focused on biogenic coal bed methane generation.…”

“… In situ biodegradation of coal to methane offers an innovative and attractive alternative to the prevailing methods of harnessing the energy potential of coal. This alternative approach employs a community of microorganisms to biologically generate methane from unmined coal and has the promise of causing less pollution, reducing the environmental impact of mining, and being potentially less expensive. ,,− The goal of our work is to develop a novel, comprehensive, and quantitative mathematical modeling framework to better understand the process of biogenic methane formation from coal. Intermediate chemical species and metabolic pathways are identified using existing literature information and are incorporated into a lumped kinetic model, referred to as the Coal to Methane (C2M) Kinetic Model.…”