Biogenic methane generation using solutions from column reactions of lignite with hydrogen peroxide

Haq, Shofa Rijalul; Tamamura, Shuji; Ueno, Akira; Tamazawa, Satoshi; Aramaki, Noritaka; Murakami, Takahiro; Alam, A.K.M. Badrul; Igarashi, Toshifumi; Kaneko, Katsuhiko

doi:10.1016/j.coal.2018.08.007

Cited by 11 publications

(8 citation statements)

References 45 publications

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“…In a previous study, Liu et al 31 reported the achieved TOC concentration of 3185 mg/L (14.7% of original coal carbon) after the pretreatment of a subbituminous coal sample with 3% H 2 O 2 for 7 months 31 . Haq et al 26 employed column experiments for the pretreatment of pulverized lignite sample with 3% H 2 O 2 and observed the maximum dissolved organic carbon concentration of 6330 mg/L at a low flow rate 26 . The present study could show the optimal course of reaction of coal with H 2 O 2 under ambient conditions, as the maximum TOC concentration was achieved in 20 days (data not shown).…”

Section: Resultsmentioning

confidence: 99%

“…Chen et al 22 reported that the oxidative pretreatment of a subbituminous coal sample led to a 10 times increase in the yield of methane 22 . Pretreated coal (using H 2 O 2 ) was also studied using column experiments to investigate the bioavailability and accumulation of organic acids 25,26 . Jones et al 23 reported an increase in bioavailability following treatment with a 5% H 2 O 2 solution 23 .…”

Section: Resultsmentioning

confidence: 99%

“…Among chemical pretreatments, the application of hydrogen peroxide (H 2 O 2 ) and potassium permanganate (KMnO 4 ) has been investigated the most regarding their ability to generate bioavailable coal‐derived substrates for methanogenesis 13,20,24,25 . H 2 O 2 can disrupt the macromolecular structure of various ranks of coal, including lignite and subbituminous, leading to the production of volatile and short‐chain organic acids, which can serve as methanogenic substrates 13,22‐27 . These organic acids can be converted into methane by methanogens.…”

Section: Introductionmentioning

confidence: 99%

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Biogenic methane generation from Vietnamese coal after pretreatment with hydrogen peroxide

et al. 2021

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Summary The application of coal as a methanogenic substrate is limited due to its recalcitrant nature, thus, requiring pretreatment for increasing bioavailability of coal. This paper describes the pretreatment of Vietnamese coal from the Red River Basin. The coal sample was treated with 3% (vol/vol) hydrogen peroxide, which resulted in 45.4% (weight %) solubilization of coal and release of various organics into the liquid phase. This dissolved fraction was analyzed for total dissolved organic carbon, Fourier transform infrared spectroscopy, high‐performance size exclusion chromatography, and high‐performance liquid chromatography. The detailed analytical investigations revealed the presence of aliphatics and aromatics hydrocarbons in the liquid phase. Short‐chain organic acids, including oxalic, citric, malic, malonic, formic, and acetic acids were also observed. The dissolved fraction was subjected to methanogenesis. Methane generation achieved the peak at 218.5 μmol/g coal after 500 days of incubation. The effect of the pretreatment process on inorganic matter of the residual coal samples was also assessed using inductively coupled plasma mass spectrometry. The pretreatment caused a reduction in metal content of the residual coal sample. The findings of the paper can be prospected as a feasibility study of methane production from Vietnamese coal after its pretreatment using hydrogen peroxide.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biogenic methane generation from Vietnamese coal after pretreatment with hydrogen peroxide

et al. 2021

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“…5 A series of measures have been carried out to increase methane production, including chemical, physical, and biological pretreatment, and supplying extra carbon resources. 6,7 Among them, co-degradation of coal and straw has been reported to significantly increase methane production under different coal ranks and different types of straw. Yoon et al first reported the feasibility of enhancing biogenic CBM by co-degradation and found that the mass ratio of rice to lignite needed to be more than 33.3% to increase methane production.…”

Section: Introductionmentioning

confidence: 99%

“…However, the biomethane productions reported by previous studies are relatively low 4 which is generally believed to be mainly due to the complexity of coal structure 5 . A series of measures have been carried out to increase methane production, including chemical, physical, and biological pretreatment, and supplying extra carbon resources 6,7 . Among them, co‐degradation of coal and straw has been reported to significantly increase methane production under different coal ranks and different types of straw.…”

Section: Introductionmentioning

confidence: 99%

The succession of microorganisms and organics in the process of methane generation by co‐degradation of anthracite and rice straw

Cheng

Duan

et al. 2022

Intl J of Energy Research

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Summary Compared with the biodegradation of coal, the co‐degradation of coal and straw can significantly improve methane production, which is potential to increase biogenic coalbed methane (CBM) production. In the laboratory tests, the succession of microbial communities and organic compounds in the process of methane generation from among degradations of coal (C), rice straw (RS), and coal‐rice straw (CRS) were investigated by using with MiSeq and GC‐MS analytical instruments. The experimental results indicated that methane production in the cultivation CRS was about 12 times higher than that of C. A shift of dominant methanogen in inoculum was observed in the process of co‐degradation from acetoclastic Methanosaeta to methylotrophic Methanomethylovorans on the seventh day, finally to hydrogenotrophic Methanobacterium. The structures of bacteria and fungi also changed significantly in the process of co‐degradation which mainly enriched macromolecules degrading and volatile fatty acids (VFAs) metabolizing microbes to facilitate methane generation. Moreover, the value of pH decreased with enrichment of VFAs, especially butanoic acid, because VFAs were dominant in the intermediates of co‐degradation. The contents of VFAs were negatively corelated with methane production during cultivation suggesting they would contribute to methane production. The component of intermediates in co‐degradation was distinct from those in cultivations of C and RS especially after 7 days as revealed by principal component analysis and heatmap analysis. These results revealed that adding rice straw into coal biodegradation changed the metabolic pathway and methanogenesis in co‐degradation.

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A review on microbial metabolism to increase coalbed methane generation and coal pretreatment to improve its bioavailability

Tang

Chen

et al. 2023

Front. Earth Sci.

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Biogenic methane generation using solutions from column reactions of lignite with hydrogen peroxide

Cited by 11 publications

References 45 publications

Biogenic methane generation from Vietnamese coal after pretreatment with hydrogen peroxide

Biogenic methane generation from Vietnamese coal after pretreatment with hydrogen peroxide

The succession of microorganisms and organics in the process of methane generation by co‐degradation of anthracite and rice straw

A review on microbial metabolism to increase coalbed methane generation and coal pretreatment to improve its bioavailability

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