Oxidation of ionic potassium-coal adducts

The behaviour of potassium-graphite intercalation compounds (GIC) and directly prepared potassium-coal adducts (PCA) was studied during their oxidation by oxygen. The reactions were carried out in dry state or after dispersion in a solvating medium. The reaction rate in THF was found to be higher. E...

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Bibliographic Details
Published in:Fuel (Guildford) 1990-03, Vol.69 (3), p.322-326
Main Authors: Nosyrev, Igor E., Stefanova, Maja D., Marinov, Stephan P., Lazarov, Lazarin
Format: Article
Language:English
Subjects:
adducts
Applied sciences
electron spin resonance
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
potassium
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:The behaviour of potassium-graphite intercalation compounds (GIC) and directly prepared potassium-coal adducts (PCA) was studied during their oxidation by oxygen. The reactions were carried out in dry state or after dispersion in a solvating medium. The reaction rate in THF was found to be higher. E.s.r. data showed that the KO 2 produced in the oxidation process was in the form of a complex in the interlayer space of graphite or inserted between the parallel layers of condensed aromatic nuclei in the case of coal adducts. This state of KO 2 explains the fact that its e.s.r. signal was registered at room temperature. This work revealed an approach for the mild oxidation of PCA with a view to structural investigation of solubilized coal.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(90)90094-7