Next Article in Journal
Preparation and Characterization of Char Carbon Obtained by Carbonization of Unused Cigarette Filter Rods: The Product Application Assessment
Previous Article in Journal
Biomass, Phyto-Ash, and Biochar from Beech Wood as Functional Additives for Natural Rubber-Based Elastomer Composites
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Materials
Volume 18
Issue 7
10.3390/ma18071660
materials-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Comprehensive Characterization of the Molecular Structure and Properties of Pitch-like Products from Coal Dissolution at Mild Temperature Using Heavy Solvents of Coal and Petroleum Origin

by
Peter Kuznetsov
1,*,
Budeebazar Avid
2,
Ludmila Kuznetsova
1,
Xing Fan
3,
Jian-Fang Xu
3,
Evgeniy Kamenskiy
1 and
Sergey Lyrschikov
4
1
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SBRAS”, 50-24 Akademgorodok, Krasnoyarsk 660036, Russia
2
Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ave. Enkhtaivan, 54b, Ulaanbaatar 13330, Mongolia
3
State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China
4
Institute of Coal Chemistry and Material Science SB RAS, FRC CCC SB RAS, 18 Sovetskij Ave., Kemerovo 650000, Russia
*
Author to whom correspondence should be addressed.
Materials 2025, 18(7), 1660; https://doi.org/10.3390/ma18071660
Submission received: 3 February 2025 / Revised: 24 March 2025 / Accepted: 29 March 2025 / Published: 4 April 2025
Browse Figures
Versions Notes

Abstract

The chemical composition and molecular structure of the pitch-like products obtained by liquid-phase reaction of bituminous coal with heavy hydrocarbon fractions of coal and petroleum origin as solvents at a moderate temperature were comprehensively characterized in terms of a new aromatic feedstock for needle coke and other valuable high-tech carbon materials. The molecular parameters of the products were characterized by using FTIR, 1H NMR, 13C NMR and XPS. Liquid-phase chromatography was used to analyze benzo(a)pyrene (BaP) as a carcinogenicity marker. The chemical composition and the characteristics of the molecular structure of the products were shown to depend greatly on the solvent used. The product obtained using coal tar as a solvent was highly aromatic, its polyaromatic nuclei consisted predominantly of protonated and pericondensed cycles sparsely substituted by CH3 and occasionally CH2 groups. The product obtained using petroleum-derived heavy gas oil as solvent was much less aromatic and prone to autogenous surface oxidation. Its aromatic nuclei contained mainly protonated and highly alkylated catacondensed chains. The intermediate structural parameters were characteristic of the product obtained using binary solvent. A remarkable feature of the pitch-like products obtained was a reduced BaP concentration (up to 40 times compared to typical coal-tar pitch). In terms of the molecular structure, the pitch-like products obtained by low-temperature dissolution of coal can serve as a new polyaromatic feedstock with a reduced carcinogenicity for the production of valuable high-tech carbon materials, needle coke, in particular.
Keywords: coal; solvents; dissolution; pitch; aromaticity; needle coke coal; solvents; dissolution; pitch; aromaticity; needle coke
Graphical Abstract

Share and Cite

MDPI and ACS Style

Kuznetsov, P.; Avid, B.; Kuznetsova, L.; Fan, X.; Xu, J.-F.; Kamenskiy, E.; Lyrschikov, S. Comprehensive Characterization of the Molecular Structure and Properties of Pitch-like Products from Coal Dissolution at Mild Temperature Using Heavy Solvents of Coal and Petroleum Origin. Materials 2025, 18, 1660. https://doi.org/10.3390/ma18071660

AMA Style

Kuznetsov P, Avid B, Kuznetsova L, Fan X, Xu J-F, Kamenskiy E, Lyrschikov S. Comprehensive Characterization of the Molecular Structure and Properties of Pitch-like Products from Coal Dissolution at Mild Temperature Using Heavy Solvents of Coal and Petroleum Origin. Materials. 2025; 18(7):1660. https://doi.org/10.3390/ma18071660

Chicago/Turabian Style

Kuznetsov, Peter, Budeebazar Avid, Ludmila Kuznetsova, Xing Fan, Jian-Fang Xu, Evgeniy Kamenskiy, and Sergey Lyrschikov. 2025. "Comprehensive Characterization of the Molecular Structure and Properties of Pitch-like Products from Coal Dissolution at Mild Temperature Using Heavy Solvents of Coal and Petroleum Origin" Materials 18, no. 7: 1660. https://doi.org/10.3390/ma18071660

APA Style

Kuznetsov, P., Avid, B., Kuznetsova, L., Fan, X., Xu, J.-F., Kamenskiy, E., & Lyrschikov, S. (2025). Comprehensive Characterization of the Molecular Structure and Properties of Pitch-like Products from Coal Dissolution at Mild Temperature Using Heavy Solvents of Coal and Petroleum Origin. Materials, 18(7), 1660. https://doi.org/10.3390/ma18071660

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop