Comparison of coal rank for enhanced biogenic natural gas production

Fallgren, Paul H.; Jin, Song; Zeng, Cuiping; Ren, Zhiyong Jason; Lu, Anhuai; Colberg, Patricia J.S.

doi:10.1016/j.coal.2013.01.014

Cited by 81 publications

(48 citation statements)

References 14 publications

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“…Chapter 2-4 (Fallgren et al, 2013a), while the results of another study has indicated that there is no correlation between coal maturity and CH4 production . Coal organic components, which can be seen microscopically, are called macerals, and are comparable to minerals in rocks (Table 1).…”

Section: Coal Formationmentioning

confidence: 99%

“…The application of MECoM is most likely to be site specific and dependent on the geology, geochemistry and microbiology of the site involved, which highlights the need for assessing the potential of individual sites (Hamilton et al, 2015). Several studies have underlined the influence of different coal types and ranking for CH4 production Fallgren et al, 2013a;, but others have found no relationship Xiao et al, 2013). Hamilton et al (2015) established a stepwise basin analysis approach to assist in identifying sweet spot areas for developing coal as a bioreactor.…”

Section: Global Biogenic Cbm Potentialmentioning

confidence: 99%

“…At the time this thesis was developed, there had been few studies focused on investigating the effects of coal as a substrate for microbial methanogenesis (Fallgren et al, 2013a;Jones et al, 2008). In addition, the changes in microbial community structure in cultures of different coal substrates were still unknown.…”

Section: Introductionmentioning

confidence: 99%

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Biogenic methane in Indonesian coal : assessing the potential using culture enrichment, molecular phylogenetic and isotopic analysis

Susilawati¹

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Biogenic coal bed methane (CBM) has gained considerable interest because of its potential to be regenerated. The research reported in this thesis evaluated the potential to develop Indonesian coals as CH 4 bioreactors using culture enrichment, molecular phylogenetic and isotopic composition analysis methods. The results increase the current understanding on microbial methanogenesis in coal, with a specific focus on Indonesian coals.Indonesian coals range in rank from lignite to bituminous, with anthracites occurring in specific areas. The coals are low in ash yield and dominated by vitrinite group macerals, with abundant liptinite group macerals, which is thought to make them good targets for methanogenesis.Stable isotope analysis of gas from pilot production wells confirmed the hypothesis that Indonesian CBM is partly biogenic in origin. Culture enrichment studies of formation water from these CBM pilot wells also indicated the presence of active coal to CH 4 consortia that has the capability for degrading native South Sumatra Basin (SSB) coals and foreign Surat Basin coal from Australia. Among the Indonesian coal basins, the SSB currently has the greatest CBM potential and good accessibility for gas, water, and coal sampling that is required to assess the biogenic CH 4 potential of Indonesian coal. Therefore, SSB was targeted for the experiments conducted in this thesis. The investigation of the microbial methanogen community structure grown on different coal substrates showed temporal changes in community structure over time, and suggested some influence of coal substrate on the microbial community composition. The community structure exhibited greater similarity when grown on coal from the same seam but of different ranks (Mangus iii sub-bituminous (SB) Rv 0.5% and Mangus Anthracite (A) Rv 2.2%) than for coal of similar types (Mangus SB Rv 0.5% and Burung SB Rv 0.39%). The obligate acetoclastic Methanosaeta members favor Burung SB coal, while metabolically versatile Methanosarcina members favor the Mangus coals and the obligate hydrogenotrophic methanogens are significant in the control cultures without coal. Regardless of the community structure similarities across all coal cultures, more CH 4 was generated from the lower rank sub-bituminous coal cultures relative to the one high-rank semi anthracite coal. These results suggest a potential relationship between coal type and rank, microbial community composition and CH 4 production, which warrants further investigation.While CH 4 measurements and molecular phylogenetic analysis confirmed the production of biogenic CH 4 in the cultures, the gas sampled from the culture headspace had δ 13 C-CH 4 values ( 52.2‰ to 22.6‰) that mostly fell outside the range currently considered to indicate a biogenic origin. In this study, the apparent carbon fractionation factor (α c =1.02±0.006) and isotope effect (ε c = 20.1‰±15.3) were found to be more useful indicators of methanogenic pathways than the absolute δ 13 C-CH 4 values. Both values agreed with the calculat...

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Section: Coal Formationmentioning

confidence: 99%

Section: Global Biogenic Cbm Potentialmentioning

confidence: 99%

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Biogenic methane in Indonesian coal : assessing the potential using culture enrichment, molecular phylogenetic and isotopic analysis

Susilawati¹

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“…This coal formation process is known as coalification [4,19]. Depending on the geological history, the coal is classified into different ranks which are defined as the extent or level of coal maturation [8,20,21]. Low coal ranks are typically located close to the surface and are relatively 'younger' compared to higher coal ranks which have been buried deeper over longer time periods [8,22].…”

Section: Csg Extractionmentioning

confidence: 99%

“…Apart from methane, additional gases such as nitrogen and carbon dioxide also have the potential to migrate through the coal strata and consequently get adsorbed into the coal matrix in varying amounts [8,27]. Geological investigation techniques and organic geochemistry analysis can reveal the most likely source and process from which the gas originated [20,23].…”

Section: Csg Extractionmentioning

confidence: 99%

Economic Synergies from Tighter Agri-Business and Coal Seam Gas Integration

Mehreen¹,

Underschultz²

2018

Agricultural Value Chain

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In addition to government royalties, Australia's coal seam gas (CSG) development has been beneficial in terms of facilitating regional economic development and growth, expansion of remote populations and facilities, increased employment opportunities and improved regional infrastructure, mainly in regional Queensland. There is substantial revenue potential for the Australian economy from the export of the resource to international energy markets. Many current CSG operations in Australia are located in prime agricultural-cattle grazing regions. Failure to identify potential coexistence opportunities between agribusiness promoting industries (API's) and the CSG industry could limit the agriculture value chain and consequently restrict Australia's food security and agricultural export potential. The economic benefits of the CSG industry combined with the importance of a sustained agricultural industry lay the foundation for investigating coexistence opportunities between these industries. Emphasis has been placed on potential synergies exhibited by the CSG industry (namely from CSG by-products) and the local agricultural industry which is typically dominated by API's.

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Influence of bioconversion on pore structure of bituminous coal

Chai

Zhou

et al. 2020

Asia-Pacific J Chem Eng

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Microbial-enhanced coalbed methane is a feasible technique to improve gas recovery and achieve antipenetration, and the coal pores determine the gasadsorption capacity and permeability. To study the pore structure of bituminous coal before and after microbial treatment mercury intrusion porosimetry, nitrogen-gas adsorption, scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy was used. The results showed that the microbial treatment increased the macropores volume of the high volatile bituminous coal and sub-bituminous coal, and decreased the micropore and mesopore volume. The porosity increased by 33.80% and 22.89% for the high volatile bituminous coal and sub-bituminous coal, respectively. The effect of bioconversion on the pore structure increases as the degree of coal evolution increases. Because of bioconversion, the oxygen-containing functional groups and the degree of coal crystallization were reduced and the organic matter was degraded, which lead to an enhancement of the pore connectivity. The optimal pH of the nutrient solution for microbial changes to the pore structure was 7. Compared with pure water, the reference of mine water to configure the nutrient solution was more conducive to microbial activity and had a greater impact on the pore structure. K E Y W O R D Scoalbed methane, bituminous coal, pore structure, pH, bio-enhancement

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Comparison of coal rank for enhanced biogenic natural gas production

Cited by 81 publications

References 14 publications

Biogenic methane in Indonesian coal : assessing the potential using culture enrichment, molecular phylogenetic and isotopic analysis

Biogenic methane in Indonesian coal : assessing the potential using culture enrichment, molecular phylogenetic and isotopic analysis

Economic Synergies from Tighter Agri-Business and Coal Seam Gas Integration

Influence of bioconversion on pore structure of bituminous coal

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