Analysis and characterization of ash-free coals from the Pechora coal basin obtained by organic solvent extraction
- Authors: Burdelnaya N.S.1, Burtsev I.N.1, Bushnev D.A.1, Kuzmin D.V.1, Mokeev M.V.2
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Affiliations:
- Institute of Geology, Komi Science Center, Ural Branch
- Institute of Macromolecular Compounds
- Issue: Vol 477, No 2 (2017)
- Pages: 1473-1477
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/191748
- DOI: https://doi.org/10.1134/S1028334X17120224
- ID: 191748
Cite item
Abstract
The probability of obtaining of ash-free coal extracts, so-called “hyper-coals,” has been shown for coals of the Pechora basin for the first time. The ash content in them does not exceed a few percent, whereas initial coals contain up to 20% ash. High-resolution 13C NMR shows the similarity in the structure of the initial coal and the extract. It is demonstrated that the solvent selected for hyper-coal extraction is not chemically inert, and the products of interaction of N-metylpyrrolidone and organic matter of coal are present in the composition of the extracts obtained.
About the authors
N. S. Burdelnaya
Institute of Geology, Komi Science Center, Ural Branch
Author for correspondence.
Email: burdelnaya@geo.komisc.ru
Russian Federation, Syktyvkar, 167000
I. N. Burtsev
Institute of Geology, Komi Science Center, Ural Branch
Email: burdelnaya@geo.komisc.ru
Russian Federation, Syktyvkar, 167000
D. A. Bushnev
Institute of Geology, Komi Science Center, Ural Branch
Email: burdelnaya@geo.komisc.ru
Russian Federation, Syktyvkar, 167000
D. V. Kuzmin
Institute of Geology, Komi Science Center, Ural Branch
Email: burdelnaya@geo.komisc.ru
Russian Federation, Syktyvkar, 167000
M. V. Mokeev
Institute of Macromolecular Compounds
Email: burdelnaya@geo.komisc.ru
Russian Federation, St. Petersburg, 199004