A multi-tool structural change investigation of Indian vitrinite rich bituminous coal due to CS2/NMP interaction

Jaiswal, Yash; Pal, Sunder Lal; Jain, Anusha; Kush, Lav; Jaiswal, Harsh; Srivastava, S C

doi:10.1016/j.molliq.2020.114599

Cited by 12 publications

(2 citation statements)

References 54 publications

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“…The previous studies have demonstrated that CS 2 has a significant effect on the microcrystalline structure of coal. ,− Our previous study illustrated that the aromatic structure accounts for the majority in raw coal, while the aliphatic structure accounts for a relatively small proportion in anthracite . Among them, CS 2 has mainly extracted the aliphatic and aromatic structures (Figure a).…”

Section: Resultsmentioning

confidence: 88%

Effects of CS₂ Solvent Extraction on Nanopores in Coal

Si,

Liu,

Lin

et al. 2023

Energy Fuels

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This study investigates the effects of the carbon disulfide (CS2) extraction on nanopores of the anthracite samples. Comprehensive pore measurement techniques, including high-pressure mercury intrusion (HPMI), low-temperature nitrogen adsorption (LTNA), and low-temperature CO2 adsorption (LTCA), were employed to analyze the variations of nanopore structure and fractal characteristics. After CS2 extraction, the macropore average diameter and volume increase, while the macropore area and fractal dimension decrease, indicating the pore-enlarged and fractal dimension-reduced effects of CS2 extraction on macropores. The pore-generated and fractal dimension-increased effects of CS2 extraction on mesopores induce reduction in the average diameter and an increase in mesopore volume, area, and fractal dimension. The pore-enlarged and fractal dimension-reduced effects of CS2 extraction on micropores cause an increase in the average diameter and reduction in micropore volume, area, and fractal dimension. These effects of CS2 extraction on nanopore structure are conducive to enhancing CBM transport. This study can provide a theoretical basis on the chemical reservoir stimulation technique with CS2 extraction.

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Section: Resultsmentioning

confidence: 88%

Effects of CS₂ Solvent Extraction on Nanopores in Coal

Si,

Liu,

Lin

et al. 2023

Energy Fuels

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“…It provides a basis for studying the pore evolution, swelling mechanism, and ordering of coal. Jaiswal et al, 2021, Yuan et al, 2021, and Chen et al, 2021 used HRTEM to identify aromatic clusters and graphite-like structures distinguished in thermally altered coal and their genesis. Yuan et al, (2021) used HRTEM image analysis to detect samples with different deterioration grades, such as anthracite and CDNG.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of coal oxidation and spontaneous combustion in Baishihu Mine, Xinjiang, China

Zhang

Zeng

2023

Front. Earth Sci.

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The characteristics of oxidized spontaneous combustion of coal can reflect the performance of coal, and an appropriate structural model can reflect it more intuitively. In this study, samples from Baishihu Coal Mine were used to study the macromolecular structure, microcrystal structure, and oxidation process of coal by X-ray photoelectron spectroscopy (XPS), carbon nuclear magnetic resonance (13C-NMR), and Fourier infrared spectroscopy (FTIR). The molecular formula C198H164O40N2 and the molecular structure model were obtained. ChemDraw and Materials Studio were used for the experimental data, and high-resolution transmission electron microscopy (HRTEM) was used to verify the aromatic ring structure built to make the constructed structural model more accurate. In the water evaporation stage, the high ring aromatic layer is converted into the low ring number. Furthermore, in the high-temperature stage, the low ring aromatic layer is transformed due to the coking and condensation reaction of the coal sample. The C element in the coal sample mainly participates in the reaction in C–C and C–H forms. The spacing and effective number of aromatic layers are relatively stable. The aggregation state of coal is a macromolecular group formed between molecules with different aromatic structures and fat structures, which is formed by the interaction of internal defects and pores of molecular groups. With the increase in the treatment temperature, water loss is heavier, oxygen absorption and weight gain are perplexing, and the value of the burnout temperature is higher. The apparent activation energy of the coal–oxygen reaction increases, and the reaction is more intricate to achieve. This study furthers the understanding of coal spontaneous combustion in this mining area, provides a reference for the prevention and control of coal spontaneous combustion.

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A study on the abnormal thermal behaviors of barkinite by ReaxFF molecular dynamics simulation

Wang,

Zhao

et al. 2023

J Therm Anal Calorim

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A multi-tool structural change investigation of Indian vitrinite rich bituminous coal due to CS2/NMP interaction

Cited by 12 publications

References 54 publications

Effects of CS₂ Solvent Extraction on Nanopores in Coal

Effects of CS₂ Solvent Extraction on Nanopores in Coal

Characteristics of coal oxidation and spontaneous combustion in Baishihu Mine, Xinjiang, China

A study on the abnormal thermal behaviors of barkinite by ReaxFF molecular dynamics simulation

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A multi-tool structural change investigation of Indian vitrinite rich bituminous coal due to CS2/NMP interaction

Cited by 12 publications

References 54 publications

Effects of CS2 Solvent Extraction on Nanopores in Coal

Effects of CS2 Solvent Extraction on Nanopores in Coal

Characteristics of coal oxidation and spontaneous combustion in Baishihu Mine, Xinjiang, China

A study on the abnormal thermal behaviors of barkinite by ReaxFF molecular dynamics simulation

Contact Info

Product

Resources

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Effects of CS₂ Solvent Extraction on Nanopores in Coal

Effects of CS₂ Solvent Extraction on Nanopores in Coal