Properties of pitch-like materials obtained using coal extraction

Avid, B.; Battsetseg, M.; Purevsuren, B.; Shiirav, G.; Kuznetsov, Petr; Кузнецова, Л. И.; Каменский, Е. С.

doi:10.1007/s42823-021-00297-4

Cited by 5 publications

(5 citation statements)

References 31 publications

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“…To characterize these different fractions, FTIR was used, and the results were shown in Figure . Within the specific number range of 3700–3000 cm –1 (hydroxyl structure region), 3000–2800 cm –1 (fatty hydrocarbon structure region), 1800–1000 cm –1 (oxygen-containing functional group structure region), and 900–600 cm –1 (aromatic hydrocarbon structure region), the HCT from different distillation temperatures exhibited relatively similar peaks . This suggests that the components of HCT do not undergo significant changes when it is fractionated at different temperatures.…”

Section: Results and Discussionmentioning

confidence: 93%

“…According to the fitting curve in Figure a–f, there are multiple peaks in the range of 900–600 cm –1 , primarily corresponding to the vibrational modes of aromatic C–H bonds, which involve the out-of-plane bending of these bonds . This suggests that aromatic rings contain numerous substituents .…”

Section: Results and Discussionmentioning

confidence: 97%

“…Within the specific number range of 3700−3000 cm −1 (hydroxyl structure region), 3000−2800 cm −1 (fatty hydrocarbon structure region), 1800−1000 cm −1 (oxygencontaining functional group structure region), and 900−600 cm −1 (aromatic hydrocarbon structure region), 9 the HCT from different distillation temperatures exhibited relatively similar peaks. 10 This suggests that the components of HCT do not undergo significant changes when it is fractionated at different temperatures. In an effort to gain deeper insight into the difference in the chemical structure between the HCT and HCT fractions obtained at various distillation temperatures, FTIR measurements for the unprocessed HCT were fitted in different structural regions using the Origin software.…”

Section: Ftir Analysis Of Heavy Coal Tar Cut By Different Fractions 3...mentioning

confidence: 98%

“…According to the fitting curve in Figure 7a−f, there are multiple peaks in the range of 900−600 cm −1 , 20 primarily corresponding to the vibrational modes of aromatic C−H bonds, which involve the out-of-plane bending of these bonds. 10 This suggests that aromatic rings contain numerous substituents. 21 Specific to the aromatic substituted hydrocarbons, CH (adjacent H, adjacent 2H, and adjacent 4H) exhibits characteristic peaks at 875, 810, and 750 cm −1 , respectively.…”

Section: 214mentioning

confidence: 99%

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Infrared Spectrum and Principal Component Analysis of Heavy Tar Cut by Different Fractions from Tar-Rich Coal

Zhang,

Xue,

Shu

2023

ACS Omega

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The composition and content of heavy tar vary significantly depending on the pyrolysis conditions and separation methods. This study aimed to effectively identify the main components and content of heavy coal tar and provide a theoretical basis for its subsequent utilization. To achieve this, simulated distillation and infrared spectrum analysis of heavy coal tar were conducted with a focus on understanding the impact of simulated distillation on the composition and structure of tar. The results showed that the fraction content in the tar underwent significant changes after simulated distillation at different temperatures. Specifically, the content of light oil decreased from 4.3 to 0.1%, while the asphalt content increased from 77.6 to 90.6%. Infrared spectrum and peak fitting revealed that the distilled coal tars exhibited similar characteristic peaks in regions associated with hydroxyl, aliphatic hydrocarbon, oxygen-containing functional group, and aromatic hydrocarbon structure. Based on the infrared spectrum of heavy coal tar, principal component analysis was conducted on different fractions. When using two principal components, the cumulative value reached 96.93%. It was found that PC1 displayed strong peak signals around 749 and 687 cm −1 , while PC2 exhibited strong peak signals near 2356 and 1143 cm −1 .

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Section: Results and Discussionmentioning

confidence: 93%

Section: Results and Discussionmentioning

confidence: 97%

Section: Ftir Analysis Of Heavy Coal Tar Cut By Different Fractions 3...mentioning

confidence: 98%

Section: 214mentioning

confidence: 99%

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Infrared Spectrum and Principal Component Analysis of Heavy Tar Cut by Different Fractions from Tar-Rich Coal

Zhang,

Xue,

Shu

2023

ACS Omega

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“…However, PP is limited in exhibiting high specific surface area and microporosity because of its stable micro-graphite structure, low softening point, and hard-to-create micropores due to their structural firmness [ 28 ]. Therefore, PP requires additional treatments to be used as an ACs precursor, including pre-heat treatments, solvent extractions, and melt filtrations [ 29 , 30 , 31 , 32 ]. Surface oxidation is another simple strategy to overcome the limitations of PP.…”

Section: Introductionmentioning

confidence: 99%

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

Kim

Lee

et al. 2022

Molecules

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Electric double-layer capacitors (EDLCs) are an excellent electrochemical energy storage system (ESS) because of their superior power density, faster charge–discharge ability, and longer cycle life compared to those of other EES systems. Activated carbons (ACs) have been mainly used as the electrode materials for EDLCs because of their high specific surface area, superior chemical stability, and low cost. Petroleum pitch (PP) is a graphitizable carbon that is a promising precursor for ACs because of its high carbon content, which is obtained as an abundant by-product during the distillation of petroleum. However, the processibility of PP is poor because of its stable structure. In this study, pre-oxidized PP-derived AC (OPP-AC) was prepared to investigate the effects of pre-oxidation on the electrochemical behaviors of PP. The specific surface area and pore size distribution of OPP-AC were lower and narrower, respectively, compared to the textural properties of untreated PP-derived AC (PP-AC). On the other hand, the specific capacitance of OPP-AC was 25% higher than that of PP-AC. These results revealed that pre-oxidation of PP induces a highly developed micropore structure of ACs, resulting in improved electrochemical performance.

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Control of the properties of a binder pitch to enhance the density and strength of graphite blocks

Kim

2023

Carbon Lett.

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Properties of pitch-like materials obtained using coal extraction

Cited by 5 publications

References 31 publications

Infrared Spectrum and Principal Component Analysis of Heavy Tar Cut by Different Fractions from Tar-Rich Coal

Infrared Spectrum and Principal Component Analysis of Heavy Tar Cut by Different Fractions from Tar-Rich Coal

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

Control of the properties of a binder pitch to enhance the density and strength of graphite blocks

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