Sequential extraction and characterization of liquefaction residue from Shenmu–Fugu subbituminous coal

Li, Peng; Zong, Zhi‐Min; Liu, Fang-Jing; Wang, Qianqian; Wei, Xian‐Yong; Fan, Xing; Zhao, Yun‐Peng; Zhao, Wei

doi:10.1016/j.fuproc.2014.04.013

Cited by 30 publications

(5 citation statements)

References 64 publications

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“…Asphaltene should be separated from coal liquefaction residue to effectively utilize. Various solvents and methods were used to extract and separate asphaltene from direct coal liquefaction residue, such as cyclohexane, methanol, acetone, carbon disulfide, n-hexane, toluene, benzene, tetrahydrofuran, acetone, 10 subcritical water, 11 and supercritical fluid extraction. 12 The extraction temperature, solvent physicochemical property, and solvent/ solid ratio are the important factors on the separated asphaltene molecular weight distribution and chemical composition.…”

Section: ■ Introductionmentioning

confidence: 99%

From Coal-Heavy Oil Co-refining Residue to Asphaltene-Based Functional Carbon Materials

Qin

Jiang

et al. 2019

ACS Sustainable Chem. Eng.

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Asphaltene-based carbon fiber, needle coke, and porous carbon nanosheets were synthesized using the extracted asphaltene from coal-heavy oil co-refining residue. Asphaltene with high average molecular weight and aromaticity is considered proper to be polymerized or crosslinked, and is a high-performing precursor to synthesize carbon materials. It can be transferred into pitch after pyrocondensation polymerization; the resultant asphaltenebased carbon fiber with a tensile strength of 0.92 GPa was obtained via spinning, preoxidization, and carbonization. While high graphitized needle coke was formed when asphaltene underwent thermal polycondensation, delayed coking, and carbonization, it provided a facile route to produce needle coke from asphaltene. A porous carbon nanosheet with a high surface area of 1717 m 2 /g and pore volume of 0.94 cm 3 /g was synthesized using asphaltene as carbon precursor, melamine as nitrogen resource, and molten salt as template; the porous carbon nanosheet showed high CO 2 adsorption amount and outstanding adsorption selectivity for CO 2 -N 2 and CO 2 -CH 4 . It indicated that asphaltene was an excellent precursor to prepare functional carbon materials for its adjustable molecular weight distribution, high aromaticity, controllable thermal condensation, and easy graphitization. It provided an effective strategy to tailor solid residue from coal and heavy oil co-refining and developed directional conversion or utilization of asphaltene.

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Section: ■ Introductionmentioning

confidence: 99%

From Coal-Heavy Oil Co-refining Residue to Asphaltene-Based Functional Carbon Materials

Qin

Jiang

et al. 2019

ACS Sustainable Chem. Eng.

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“…. From a previous report, the difference in alkylation distribution for molecules in coals obviously worked on coal reactivity in hydroliquefaction . Each additional aliphatic ring or double bond eliminates two hydrogen atoms, and thus causes an increase in the DBE number of 1.…”

Section: Resultsmentioning

confidence: 97%

Analysis of soluble components in coals and interpretations for the complex mass spectra

Fan

Xia

et al. 2017

Rapid Comm Mass Spectrometry

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“…For this reason, various processes such as pyrolysis and liquefaction have been tried to produce solid and liquid fuels or chemical raw materials from coal. There are many studies on this subject in the literature [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Investigation of Improvement in Coal Liquefaction Product Efficiency

Korkmaz

Bentli

2019

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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The aim of this study is to improve the yields of Malatya-Arguvan lignite liquefaction products (char, preasphaltene, asphaltene, oil-gas). For this purpose, the liquefaction experiments of coal which was firstly raw and then enriched by spiral have been carried out. The chemical characterizations of the obtained products have been determined by proximate and ultimate analysis. The composition of the oil was identified by GC-MS. As a result of the enrichment, the char yield decreased by 9.28% whereas the preasphaltene yield increased by 5.31% and the oil + gas yield increased by 4.18%. Total conversion increased from 47.57% to 56.85%. It has been concluded that the enrichment process has a positive effect on the liquefaction yields.

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Sequential extraction and characterization of liquefaction residue from Shenmu–Fugu subbituminous coal

Cited by 30 publications

References 64 publications

From Coal-Heavy Oil Co-refining Residue to Asphaltene-Based Functional Carbon Materials

From Coal-Heavy Oil Co-refining Residue to Asphaltene-Based Functional Carbon Materials

Analysis of soluble components in coals and interpretations for the complex mass spectra

A Study on the Investigation of Improvement in Coal Liquefaction Product Efficiency

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