A mini review on biotransformation of coal to methane by enhancement of chemical pretreatment

Zhang, Dan; He, Huan; Ren, Yi; Haider, Rizwan; Urynowicz, Michael A.; Fallgren, Paul H.; Jin, Song; Ali, Muhammad Ishtiaq; Jamal, A. Rahman A.; Sabar, Muhammad Adnan; Guo, Hongguang; Liu, Fang-Jing; Huang, Zaixing

doi:10.1016/j.fuel.2021.121961

Cited by 27 publications

(7 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methane was produced by acetoclastic, methylotrophic, and hydrogenotrophic methanogens [ 2 ]. The largest abundance of methanogens in the original flora in this study was Methanoculleus [ 3 ], the most reported methanogenic microorganism in the literature.…”

Section: Resultsmentioning

confidence: 99%

“…Many reports have indicated that nearly 20% of the methane gas in the developed CBM resources is produced by microorganisms [ 1 ]. This has drawn the attention of many researchers worldwide to the promotion of CBM production by microorganisms and proposed a mechanism for the bioconversion of coal to methane [ 2 ]. Biogas obtained from in-lab gas production simulation experiments typically consists of methane and unconverted hydrogen and carbon dioxide [ 3 – 5 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biogasification of methanol extract of lignite and its residue: A case study of Yima coalfield, China

et al. 2022

Self Cite

View full text Add to dashboard Cite

To investigate the biogas generation characteristics of the organic matter in lignite, methanol extraction was conducted to obtain the soluble fraction and the residual of lignite, which were subsequently taken as the sole carbon source for biogas production by a methanogenic consortium. Afterward, the composition of compounds before and after the fermentation was characterized by UV-Vis, GC-MS, and HPLC-MS analysis. The results indicated that the methanogenic microorganisms could produce H2 and CO2 without accumulating CH4 by utilizing the extract, and the methane production of the residue was 18% larger than that of raw lignite, reaching 1.03 mmol/g. Moreover, the organic compounds in the methanol extract were degraded and their molecular weight was reduced. Compounds such as 1, 6-dimethyl-4-(2-methylethyl) naphthalene, 7-butyl-1-hexylnaphthalene, simonellite, and retene were completely degraded by microorganisms. In addition, both aromatic and non-aromatic metabolites produced in the biodegradation were detected, some of which may have a negative effect on the methanogenesis process. These results revealed the complexity of the interaction between coal and organism from another point of view.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biogasification of methanol extract of lignite and its residue: A case study of Yima coalfield, China

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…In general, microbial coal transformation is summarized and denoted as the ABCDE system (A = alkali, oxidative; B = biocatalysts; C = chelators; D = detergents; and E = esterases) [ 2 , 53 ]. In most bacteria and actinomycetes, alkaline action and chelation play the primary role, while enzymes play the most crucial role in fungi.…”

Section: Coal Materials As Substrates For Microorganismsmentioning

confidence: 99%

“…Ultimately, the various known microbial metabolic pathways are associated with the wide array of organic substrates, carbon and oxygen content, aromaticity, and relative moisture in coal. Moreover, some natural coals serve as a reservoir of microbial strains able to degrade lignin, having a molecular structure similar to those of coal components [ 2 ]. Coals are categorized into several ranks based on depositional, physicochemical, and coalification characteristics that eventually reflect coal microbiology.…”

Section: Introductionmentioning

confidence: 99%

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Akimbekov

Digel

Tastambek

et al. 2022

Biology

View full text Add to dashboard Cite

It was generally believed that coal sources are not favorable as live-in habitats for microorganisms due to their recalcitrant chemical nature and negligible decomposition. However, accumulating evidence has revealed the presence of diverse microbial groups in coal environments and their significant metabolic role in coal biogeochemical dynamics and ecosystem functioning. The high oxygen content, organic fractions, and lignin-like structures of lower-rank coals may provide effective means for microbial attack, still representing a greatly unexplored frontier in microbiology. Coal degradation/conversion technology by native bacterial and fungal species has great potential in agricultural development, chemical industry production, and environmental rehabilitation. Furthermore, native microalgal species can offer a sustainable energy source and an excellent bioremediation strategy applicable to coal spill/seam waters. Additionally, the measures of the fate of the microbial community would serve as an indicator of restoration progress on post-coal-mining sites. This review puts forward a comprehensive vision of coal biodegradation and bioprocessing by microorganisms native to coal environments for determining their biotechnological potential and possible applications.

show abstract

“…Coal reservoirs in China are commonly known to have low porosity, low permeability, and high CBM adsorption. ,, Thus, the use of new technologies, including hydraulic fracturing technology, and the use of chemical methods and microbially enhanced CBM to improve the parameters of coal seam properties have become necessary. − However, investigating the effect of fractures using a PNM for fluid flow simulations has always been a challenge. In this study, a PNM was constructed using focused ion beam scanning electron microscopy (FIB-SEM) images.…”

Section: Introductionmentioning

confidence: 99%

Novel Discrete Fracture Network Model for Multiphase Flow in Coal

Liu

Cai

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Multiphase flow intensely affects the movement and accumulation of other fluids in coal and plays an essential role in predicting the permeability of coal during coalbed methane (CBM) production. Fractures have played a decisive role in the transport of CBM after hydraulic fracturing has occurred. In this study, a multiscale pore network model (PNM) was constructed on the basis of focused ion beam scanning electron microscopy (FIB-SEM) image results. Additionally, a novel discrete fracture network model, fracture–pore network model (F–PNM), was proposed to investigate the effect of fracture density, fracture developing direction, and wettability on multiphase flow. The results reveal that the permeability of F–PNM increases with the increase of the fracture density, which could be the result of the predominance of snap off. The permeability decreases as the angle between the fracture and flow direction increases; initially, the permeability decreases steeply and then it tends to remain stable; and for angles between 0° and 15°, the permeability decreased by as much as 61.8%. Moreover, the wettability of coal has limited impact on its water relative permeability; however, it has a measurable effect on gas relative permeability, which could be owing to water accumulation on the coal surface under different wettability conditions. A good wetting performance would have a negative effect on the CBM production and reduce flowback efficiency.

show abstract

A mini review on biotransformation of coal to methane by enhancement of chemical pretreatment

Cited by 27 publications

References 82 publications

Biogasification of methanol extract of lignite and its residue: A case study of Yima coalfield, China

Biogasification of methanol extract of lignite and its residue: A case study of Yima coalfield, China

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Novel Discrete Fracture Network Model for Multiphase Flow in Coal

Contact Info

Product

Resources

About