A modeling for effect of iron compounds on methane formation in the coal

Skoblik, A. P.; Shanina, B. D.; Kolesnik, V. N.; Konchits, А. A.; Gavriljuk, V.G.

doi:10.1016/j.fuel.2012.01.080

Cited by 7 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The changes are influenced heavily by technogenic processes connected with coal mining. Mineral coal composition and conditions of coal seam formation may result in the development of coal capabilities for different gas-dynamic phenomena (GDP) which manifestation is possible if such seams are extracted [11]- [14]. As a rule, characteristics of outburst hazardous coal differ from 'silent' coal having close V daf values.…”

Section: Introductionmentioning

confidence: 99%

“…outbursts are among the primary reasons of injury cases in coal industry. In addition to high gas content in coal as well as a gradient of changes in gas pressures depending upon the distance from a seam edge [11], intrusions and other abnormal geological conditions [9]- [11], physicochemical coal characteristics [9], [13]- [16] play an essential role in the initiation of outburst gas-dynamic phenomena.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coal from the outburst hazardous mine seams: Spectroscopic study

Krasnovyd¹,

Konchits²,

Shanina³

et al. 2023

Min. miner. depos.

View full text Add to dashboard Cite

Purpose is to analyze influence mechanisms of physicochemical coal properties on the degree of outburst risk as well as desorption kinetics of methane. Methods of scanning electron microscopy (SEM), electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR), infrared spectroscopy (IR) and Raman scattering (RS) have been applied. The samples have been taken from Donbas coal seams varying in their ranks (i.e. carbonization degree). Findings. It has been identified that in the context of outburst hazardous zones, the ratio between integral intensity of spectral RS bands D and G, K = I(D)/I(G) shows abnormal dependence upon the nominal amount of volatile compounds connected with the impact by iron impurities. It has been defined that within the ferriferous coal samples, concentration of spins ns (i.e. the broken carbon bonds) correlates with iron content. Methane adsorption/desorption processes in the studied coal samples have been studied with the help of NMR method; in addition, they have been described using superposition of diffusion and filtration mechanisms. Originality. It has been understood that high iron content is typical for coal with a greater outburst hazardous degree. The abovementioned iron content and I(D)/I(G) and Ns correlation between the values determines the key role of iron impurities for coal metamorphism processes. For the first time, correlation between the outburst hazardous degree of coal seam and intensity of 3030 cm-1 IR band, stipulated by aromatic CH groups where hydrogen is in atomic status, has been identified. Practical implications. Predictability of outburst risk has been improved in the context of coal seam mining.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coal from the outburst hazardous mine seams: Spectroscopic study

Krasnovyd¹,

Konchits²,

Shanina³

et al. 2023

Min. miner. depos.

View full text Add to dashboard Cite

show abstract

“…Therefore, volatile matter and total organic carbon content were the most important internal factors of biogenic methane conversion of coals and mudstones, respectively. Mineral composition, mainly pyrite, is likely to limit the biogenic methane generation from mudstones, though the iron compounds (pyrite and siderite) have a catalytic effect on thermogenic methane formation . However, sulfide is a toxic substance for the metabolism of anaerobic microflora .…”

Section: Resultsmentioning

confidence: 99%

“…Mineral composition, mainly pyrite, is likely to limit the biogenic methane generation from mudstones, though the iron compounds (pyrite and siderite) have a catalytic effect on thermogenic methane formation. 77 However, sulfide is a toxic substance for the metabolism of anaerobic microflora. 78 Therefore, pyrite inhibits the efficiency of biogenic methane generation.…”

Section: Resultsmentioning

confidence: 99%

Potential and Constraints of Biogenic Methane Generation from Coals and Mudstones from Huaibei Coalfield, Eastern China

Bao

Huang

et al. 2018

Energy Fuels

View full text Add to dashboard Cite

Coalbed methane (CBM) resources formed biogenically and thermogenically have been discovered in the Permian coalbeds of the Huaibei coalfield. Four coals, three mudstones, and five coalbed-produced water samples collected from the Linhuan, Luling, and Haizi coal mines of the Huaibei coalfield were characterized geochemically and biologically to gain an understanding of the biogenic methane generation potential and the microbial communities involved in situ and in coalbed-produced water-enriched samples. The 16S rRNA gene high-throughput sequencing results showed that the archaeal communities from in situ and enriched cultures were dominated by Methanolobus and Methanobacterium species. The organic material of coals and mudstones could be biodegraded under an anaerobic incubation. The maximum biogenic methane generation potentials of coal and mudstones were 98.5 and 72.5 μmol/g within 123 days, respectively. Volatile matter and total organic carbon (TOC) content were the most important internal factors affecting biogenic methane generation from coals and mudstones. The Na-SO 4 water type resulted in a low methane generation potential.

show abstract

“…At the same time, macromolecules in the pyrolysis gas can enter the pores of the catalyst and undergo cracking to form small molecular substances.Acids can be converted to hydrocarbon compounds by a decarboxylation reaction with the aid of a catalyst. Oxygenates can be converted into small molecules, such as CO 2 , CO and H 2 O, which reduce the molecular size of the bio-oil and make the bio-oil more stable (Skoblik et al, 2012). As a result, the amount of gaseous product in the catalytic pyrolysis product increases, and the corresponding amount of bio-oil decreases.…”

Section: Products Yieldsmentioning

confidence: 99%

Aromatics Production With Cobalt-Modified Ultra-Stable Y Zeolites As Catalysts In Catalytic Pyrolysis of Ginkgo Biloba Residue

yousaf

Tian

et al. 2021

Preprint

View full text Add to dashboard Cite

The current research studied the performance of novel and cheap catalysts, ultra-stable Y zeolites (USY) and cobalt-modified USY for the efficient production of aromatics from the ginkgo Biloba residue (GBR) using a pyrolysis reactor. Cobalt-modified USY improved the quality of the pyrolysis products e.g. removed unwanted impurities from bio-oil, increased the yield of gases, and overall boosted the GBR conversion. Under the action of USY modified with cobalt, the yield of CO, CH4, and CO2 in the gas production increased significantly, while the yield of H2 was dropped. The selectivity of naphthalene and 1-methylnaphthalene gradually decreased. The composition of aromatic hydrocarbons was reduced, while the content and selectivity ratios of toluene and xylene were increased. This study describes a high-value method using GBR, which could be used as a sustainable resource for the production of hydrocarbons, especially for the preparation of high-quality toluene and phenols.

show abstract

A modeling for effect of iron compounds on methane formation in the coal

Cited by 7 publications

References 7 publications

Coal from the outburst hazardous mine seams: Spectroscopic study

Coal from the outburst hazardous mine seams: Spectroscopic study

Potential and Constraints of Biogenic Methane Generation from Coals and Mudstones from Huaibei Coalfield, Eastern China

Aromatics Production With Cobalt-Modified Ultra-Stable Y Zeolites As Catalysts In Catalytic Pyrolysis of Ginkgo Biloba Residue

Contact Info

Product

Resources

About