The relationship between the molecular composition of coal and the conversion of its organic matter during thermal dissolution

Safin, V. A.; Kuznetsov, Petr; Avid, B.; Кузнецова, Л. И.; Fan, Xing; Исмагилов, З. Р.

doi:10.1007/s42823-022-00344-8

Cited by 3 publications

(2 citation statements)

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“…The coal dissolution was carried out according to [13,16] using an experimental unit equipped with a 2 l stainless steel autoclave with a mechanical stirrer. The autoclave was charged with a coal/ solvent slurry (900 g with a proportion of 1:2 by the weight), and the reaction was carried out at 380 °C for 60 min at autogenous pressure.…”

Section: Reactor Unit and Dissolution Proceduresmentioning

confidence: 99%

“…The use of commercial hydrocarbon residues as the non-recycling solvents for coal dissolution can be a promising way because it allows co-processing of the hydrocarbon residues with coal into high value added demanded chemicals and fuels, in addition to significant savings in solvent regeneration. We studied recently [13][14][15][16] the dissolution of various coals at mild temperature to produce quinoline-soluble substances using a variety of commercially available coal-and petroleum-derived hydrocarbon fractions as solvents. The dissolution of bituminous coals in the liquid-phase solvent medium at a mild temperature of 350-380 °C was supposed to occur through depolymerization via weak linkages between the aromatic units.…”

Section: Introductionmentioning

confidence: 99%

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The Composition and Properties of Soluble Products from the Coal ThermoSolvolysis with Hydrocarbon Residues and Blends as Solvents

Kuznetsov¹,

Ismagilov

Kuznetsova³

et al. 2022

Eurasian Chem.-Technol. J.

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The dissolution of bituminous coal at mild temperature was studied using a variety of commercially available coal- and petroleum-derived hydrocarbon fractions, hydrorefined derivatives and blends as solvents. The chemical and molecular composition of the coal, solvents and extracts were characterized by chemical and group analyses, and by IRFT, 1H NMR, GC-MS and liquid chromatography. Low volatile solvents like highly aromatic coal tar (CT), its anthracene fraction (AFCT), petroleum-derived solvent (HGOCC) and binary blends were found to exhibit high performance for coal dissolution into quinoline solubles (to 79‒82%), and the yields of gases being no more than 0.5%. The extracts obtained using CT and AFCT solvents represented pitch-like matter consisting of rarely substituted aromatic molecules with 4‒5 condensed rings. HGOCC extract was much less aromatic, the aromatic rings being highly substituted with fairly large alkyl substituents. The blended solvents yielded more extracts, and their molecular indexes were average between those obtained with each solvent separately. A remarkable finding was that the extracts obtained were characterized by significantly lower content of benzo(a) pyrene (BaP) compared to solvents used, its content further decreased as the time of coal dissolution increased.

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Section: Reactor Unit and Dissolution Proceduresmentioning

confidence: 99%