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2015 | 128 | 3 | 264-267
Article title

Groups of Paramagnetic Centres in Reduced and Methylated Low Rank Coal

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Abstracts
EN
Low rank Illinois No. 6 coal was studied by electron paramagnetic resonance EPR spectroscopy. The parameters of EPR spectra (spectroscopic splitting factors g, linewidths ΔB_{pp}, concentrations of paramagnetic centres N) were measured for row and chemically treated coal (demineralized, reduced and methylated samples). The multi-component structure of experimental spectra of this coal was proved. Two groups of paramagnetic centres responsible for broad Lorentzian 1 and narrow Lorentzian 2 lines exist in studied samples. Paramagnetic centres connected with component lines revealed different behaviour during chemical treatments.
Keywords
Contributors
author
  • Centre of Polymer and Carbon Materials of the Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
author
  • Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
author
  • Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
  • Institute of Physics, University of Zielona Góra, Z. Szafrana 4a, 65-516 Zielona Góra, Poland
  • Institute of Molecular Physics of the Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
  • Institute of Physics, University of Zielona Góra, Z. Szafrana 4a, 65-516 Zielona Góra, Poland
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv128n305kz
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