A Study of the Products of Supercritical Fluid Extraction of Coals from the Chadan Deposit by Thermogravimetry and IR Spectroscopy

被引：0

作者：

Ondar, S. A. ^{[1
,2
]}

Soldup, Sh N. ^{[1
]}

Mikhailenko, M. A. ^{[2
]}

Tas-ool, L. Kh ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Tuvinian Inst Explorat Nat Resources, Kyzyl 667007, Tuva Republic, Russia

[2] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Novosibirsk 630128, Russia

来源：

SOLID FUEL CHEMISTRY | 2019年 / 53卷 / 02期

关键词：

supercritical fluid extraction (SFE) of coal; coal; unextractable solid residue; coal bitumen; thermal analysis; IR spectra;

D O I：

10.3103/S0361521919020095

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The thermal properties of the solid products of supercritical fluid extraction of coal from the Chadan deposit in benzene and the composition of bitumens separated in different temperature ranges (to 120, 120-200, 200-285, and 285-400 degrees C) were studied. In contrast to the original coal, the thermal destruction of insoluble solid coal residue from extraction began at a higher temperature, and it was accompanied by a lower yield of volatiles. A comparative analysis of the characteristic parameters of the IR spectra and chromatograms showed changes in the composition of bitumen as a function of the extraction temperature: at low temperatures, oil components were extracted from coal, and the concentrations of tars and asphaltenes increased with temperature.

引用

页码：71 / 75

页数：5

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