Optimization of biogenic methane production from coal

Fuertez, John; Nguyen, V. D.; McLennan, John; Adams, D.; Han, Kyu Bum; Sparks, Taylor D.

doi:10.1016/j.coal.2017.09.014

Cited by 19 publications

(15 citation statements)

References 46 publications

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“…Coal is the most buried fossil fuel on the planet and accounts for around 30% of the global energy use [10,11,34]. However, coal releases several pollutants, such as dust, sulfur oxides, nitrogen oxides, and carbon dioxide during use [10,35,36].…”

Section: Discussionmentioning

confidence: 99%

“…To date, the methane conversion of coal has been mainly improved by increasing the bioavailability of coal, biostimulation, and bioaugmentation. The bioavailability of coal can be increased to some extent by reducing the coal particle size, increasing the porosity, and adding surfactants [10,11]. Bioaugmentation and biostimulation, in which a microbial consortium or inorganic nutrients, such as nitrogen, phosphorus, trace elements, and vitamins, are supplied to the coal bed, have also been used effectively for promoting coal conversion to methane [2,3,12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Bioaugmentation and biostimulation, in which a microbial consortium or inorganic nutrients, such as nitrogen, phosphorus, trace elements, and vitamins, are supplied to the coal bed, have also been used effectively for promoting coal conversion to methane [2,3,12,13]. However, the methane yield obtainable from 1 g of coal is still only a few tens of µL to a few mL [2,5,11,14]. The organic content of coal varies depending on the coalification degree, and in the case of lignite, is 0.5-0.8 g COD (chemical oxygen demand) per g of coal.…”

Section: Introductionmentioning

confidence: 99%

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Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

2018

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This study demonstrated the enhancement of biogenic coal conversion to methane in a bioelectrochemical anaerobic reactor with polarized electrodes. The electrode with 1.0 V polarization increased the methane yield of coal to 52.5 mL/g lignite, which is the highest value reported to the best of our knowledge. The electrode with 2.0 V polarization shortened the adaptation time for methane production from coal, although the methane yield was slightly less than that of the 1.0 V electrode. After the methane production from coal in the bioelectrochemical reactor, the hydrolysis product, soluble organic residue, was still above 3600 mg chemical oxygen demand (COD)/L. The hydrolysis product has a substrate inhibition effect and inhibited further conversion of coal to methane. The dilution of the hydrolysis product mitigates the substrate inhibition to methane production, and a 5.7-fold dilution inhibited the methane conversion rate by 50%. An additional methane yield of 55.3 mL/g lignite was obtained when the hydrolysis product was diluted 10-fold in the anaerobic toxicity test. The biogenic conversion of coal to methane was significantly improved by the polarization of the electrode in the bioelectrochemical anaerobic reactor, and the dilution of the hydrolysis product further improved the methane yield.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

2018

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“…In recent years many studies are being focused on analyzing the potential of various coal seams to produce methane. Coal of various ranks like bituminous (Wang et al 2016), (Rathi et al 2015), subbituminous (Jones et al 2008) (Fuertez et al 2017), and lignite (Wang et al 2017) are being used as substrate.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the utilization of coal washery rejects by different microbial sources for biogenic methane production

Ponnudurai¹,

Rajarathinam²,

Muthuvelu³

et al. 2022

Chemosphere

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“…In this context, unconventional gas resources, including coalbed methane (CBM), have gained attention from both the government and investors (Wang et al 2016a, b;Wang and Lin 2014;Fuertez et al 2017). The latest round of national petroleum resources assessment by the Ministry of Land and Resources estimates the amount of CBM resources within 2000 m at 30 trillion cubic meters, of which 12.5 trillion cubic meters are potentially recoverable (the Ministry of Land and Resources 2015).…”

Section: Introductionmentioning

confidence: 99%

An approach to grading coalbed methane resources in China for the purpose of implementing a differential production subsidy

Xia

Yin

Yu³

et al. 2019

Pet. Sci.

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The heterogeneity of coalbed methane (CBM) resources was not taken into account when the current indiscriminate subsidy policy was developed. In it, limited subsidy funds are given first to high-quality resources and even to subsidize profitable projects. Thus, the policy has had less than the intended effect in improving CBM production. To implement a new type of differential subsidy, it is necessary to grade the CBM resources, as will be discussed in this paper. After the factors affecting the resources value are systemically examined, sorted and merged, the relationship between the key factors and economic value is analyzed by an engineering economics method, and the production profile type, peak production (or stable production) and buried depth are used as grading factors. The production profile type is used to categorize, and peak production and buried depth are used to grade resources within the same category. The grading method is as follows: use subsidy levels at the economic critical point (NPV = 0) to identify the grades of resources, and determine the combination of peak production and buried depth for different resources grades base on indifference curves drawn according to the relationship between the economic value and peak production and buried depth.

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Optimization of biogenic methane production from coal

Cited by 19 publications

References 46 publications

Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

Investigation on the utilization of coal washery rejects by different microbial sources for biogenic methane production

An approach to grading coalbed methane resources in China for the purpose of implementing a differential production subsidy

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